Journal articles: 'Quenc'

1

Dreer, Igor. "L’application de la théorie de « phonologie comme comportement humain » à l’analyse de la distribution phonotactique des consonnes et des voyelles dans les mots monosyllabiques du français standard." SHS Web of Conferences 46 (2018): 09002. http://dx.doi.org/10.1051/shsconf/20184609002.

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Dans cet article, nous appliquons la théorie de « phonologie comme comportement humain »à-dire qui consiste à atteindre le maximum de communication avec le minimum d’effort [30]. En d’autres mots, l’analyse va montrer qu’il existe un rapport direct entre l’effort que les locuteurs font pour contrôler les muscles des organes phonateurs, impliqu és dans la production des phonèmes, et la fré quence plus é levée ou plus faible de ces phonèmes dans différentes distributions phonotactiques. D’une part, nous allons montrer quantitativement que les suites de mouvements qui sont plus faciles à articuler et, par consé quent, plus faciles à apprendre à contrôler sont préférées à celles qui exigent une augmentation d’effort et, donc, qui sont plus difficiles à apprendre à contrôler. D’autre part, on augmente un effort pour créer un plus grand nombre de distinctions qui peuvent être clairement perçues dans la communication.

2

Sasaki, K., T. Ogitsu, N. Ohuchi, and K. Tsuchiya. "Study of quench propagation with quench antennas." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 416, no. 1 (October 1998): 9–17. http://dx.doi.org/10.1016/s0168-9002(98)00617-2.

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3

Choi, J. Y., D. H. Ko, P. K. Seo, S. H. Cha, and B. M. Kim. "Prediction of Hardness of Hot Stamped Parts Using the Quench Factor Analysis." Transactions of Materials Processing 23, no. 6 (October 1, 2014): 357–62. http://dx.doi.org/10.5228/kstp.2014.23.6.357.

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4

Roux, Jacques, and André Lefèvre. "A fast-quench device for internally heated pressure vessels." European Journal of Mineralogy 4, no. 2 (April 21, 1992): 279–82. http://dx.doi.org/10.1127/ejm/4/2/0279.

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5

Guo, Xing Long. "Multi-Field Coupling Simulation on Quench Process in Superconducting Magnet." Advanced Materials Research 926-930 (May 2014): 3096–99. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.3096.

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Quench protection system is a necessary part in superconducting magnets design. Rational design of quench protection system requires understanding of heat transfer and electromagnetic process in the magnet during quench process. A multi-field coupling model was developed to study quench process. This model sequentially solves two different physics environments, one is thermal physics environment, and the other one is electromagnetic physics environment. This model was applied to simulate one solenoid magnet in practical engineering. The main parameters results during quench process were presented. This research enriches the theory of numerical simulation on quench process of superconducting magnet, and provides theoretical guidance for the design of quench protection system.

6

Wang, Shudan, Mingzhi Guan, Jiaxiang Chen, Xingzhe Wang, and Youhe Zhou. "A visual and full-field method for detecting quench and normal zone propagation in HTS tapes." Superconductor Science and Technology 35, no. 2 (December 29, 2021): 025010. http://dx.doi.org/10.1088/1361-6668/ac3f9d.

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Abstract A fast and effective quench detection method is especially challenging in the development of high-field high-temperature superconducting (HTS) magnets for their safe operations and reliably releasing the stored energy during a quench. The occurrence and propagation of a quench are often accompanied by strong thermal and magneto-mechanical responses within superconducting magnets. Aiming to detect a quench in the whole process and capture the thermoelastic behavior associated with it, a new detection technique with a visual and full-field perception based on the digital image correlation (DIC) method is proposed in the present study. The experiment of a quench triggered thermally by a local spot heater is conducted for a YBCO coated conductor tape in a cryogenic chamber. The evolution and characteristics of the full-field strain in the HTS tape during the processes of a non-quench, a quench occurrence and quench propagation are intuitively presented with experimental observations. For the comparison purpose, the conventional quench detection methods by monitoring temperature and voltage signals during a quench are also utilized experimentally. The results verify the visual and full-field quench detection method, which uses a criterion of thermoelastic strain-rate for the quench occurrence and the evolution of strain contours for the normal zone propagating aspect. Additionally, a numerical quench model of coupled thermoelasticity to simulate the experiment is established and solved with the aid of Comsol multiphysics software. The quantitative results are in good agreement with the experimental measurements to prove the reliability and availability of the developed detection method. Since the DIC method is non-contact and insensitive to intense electromagnetic interferences, it is expected to provide a new technique on quench issues and some basic measurements on strain/stress behaviors in extreme environments of high-field HTS magnets in the future.

7

Weriono, Weriono. "Karekteristik Proses Full Annealing Dengan Variasi Media Quench Terhadap Kekuatan Mekanik Aisi 1045." JURNAL UNITEK 11, no. 2 (August 12, 2020): 166–74. http://dx.doi.org/10.52072/unitek.v11i2.40.

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Baja AISI 1045 biasanya dipakai sebagai komponen automotif yang aplikasinya sering mengalami pembebanan, gesekan dan tekanan. Tujuan penelitian untuk pelunakan sehingga kekuatan Tarik, kekuatan Impak dan kekerasan menjadi lebih baik sehingga dilakukan proses full annealing quench oli dan air. Rata-rata kecepatan pendinginan adalah faktor menentukan kekerasan suatu material. Proses full annealing quench oli adanya pelunakan cukup baik yang menurunkan kekerasan dengan kekerasan tertinggi 3,5 HRC temperatur 8500C sedangkan quench air kekerasan tertinggi 43 HRC temperatur 8000C. Kekuatan impak quench oli tertinggi temperatur 7500C bernilai 10,95x104 Joule/m2 sedangkan quench air tertinggi temperatur 7500C bernilai 16,71x104 Joule/m2. Kekuatan ulur tertinggi pada suhu 8000C quench oli bernilai 949,02 N/mm2 sedangkan kekuatan ulur tertinggi pada suhu 7500C quench air bernilai 1683,23 N/mm2 tetapi material ini rapuh dibandingkan dengan quench oli yang mempunyai keliatan yang cukup baik.

8

Xu, Dao Kui, Paul A. Rometsch, Hua Chen, and Barry C. Muddle. "Influence of Solution Treatment on Microstructure and Quench Cracking in a Water-Quenched Aluminium Alloy 7150." Materials Science Forum 654-656 (June 2010): 934–37. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.934.

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In this work, the influence of multi-step solution (MSS) treatments on the constituent particle dissolution, overheating and associated quench cracking behaviour in room temperature water-quenched 7150 Al alloy has been investigated. For comparison, the microstructure and quench cracking behaviour of single step solution treated samples water-quenched from 505°C were also investigated. Based on optical microscopy of differently quenched samples, the quench cracking mode and the influence of overheating of constituents on the quench cracking behaviour have been demonstrated. The results reveal that the constituent particles can be effectively dissolved in the MSS-505°C samples. When the quench temperature of MSS-505°C samples is equal to or higher than 485°C , macro quench cracks can be clearly observed. Moreover, the density and length of the quench cracks increase with increasing quench temperature. Etched microstructures indicate that the quench crack propagation mode is intergranular. However, for samples directly heated to 505°C , typical overheating can be observed at the triple junctions and these regions preferentially act as crack propagation routes.

9

Lalpoor, Mehdi, Tim Vossen, Michael Xhonneux, and Arne Schlegel. "Investigation of Quench Sensitivity in 6xxx Aluminum Alloys." Materials Science Forum 941 (December 2018): 796–801. http://dx.doi.org/10.4028/www.scientific.net/msf.941.796.

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Quench trials were performed on AA6005A and AA6016 alloys to assess the sensitivity of their tensile properties as well as bendability to quench after solution heat treatment. Results indicate that the tensile properties in T4 and in the paint-baked state (2% pre-strain + 185 °C/20 min) are hardly affected by quench rate as long as the exit temperature (Texit) is sufficiently low. The bendability however, appears to be more sensitive to quench rate, and the sensitivity depends on the chemical composition of the alloy. The alloy with a higher excess Si content exhibits higher sensitivity to natural aging which in turn affects the bending and hemming performance of the material. Therefore, it is not only the quench rate which affects the bendability but also the temperature of the material at the end of quench. DSC analysis revealed how cluster formation proceeding the solution heat-treatment (SH) and quench provokes the quench sensitivity.

10

Dou, Rui Feng, Zhi Wen, Xun Liang Liu, and Guo Feng Lou. "Heat Transfer Model of Roller Quench in Strip Continuous Heat Treatment Process." Advanced Materials Research 160-162 (November 2010): 536–43. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.536.

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Roller quench is a rapid cooling technique used in strip continuous heat-treatment process, which is one of the most important processes in producing cold-rolled strip steel. Heat transports by contact heat transfer in roller quench, for the complex characteristics of contact heat transfer, roller quench is very difficulty to simulate. In this paper a roller quench heat transfer model is build based on Fourier-Kirchhoff differential equations. A new correlation function of contact conductance is developed from statistical mechanics model results by least square method. This correlation function solves the heat transfer boundary condition in contact region between strip and roller. In this model the contact radiation is also considered. The roller quench model predicts the heat transfer characteristics of roller quench. The model is useful for the designing and controlling of the roller quench system.

11

Kassner, M. E., P. Geantil, and X. Li. "A Study of the Quench Sensitivity of 6061-T6 and 6069-T6 Aluminum Alloys." Journal of Metallurgy 2011 (May 19, 2011): 1–5. http://dx.doi.org/10.1155/2011/747198.

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The purpose of this study is to investigate the quench sensitivity of the mechanical properties of 6061 and 6069 aluminum alloys. The relationship between mechanical properties and quench delay time at various temperatures between 200–500°C was determined. It was concluded that the 6069-T6 was somewhat more quench sensitive than 6061, which may be consistent with the composition difference. This study also provides increased data on the quench sensitivity of the traditional alloy, 6061-T6.

12

MacKenzie, D. Scott. "Sizing Quench Tanks for Batch Immersion Quenching." AM&P Technical Articles 172, no. 6 (June 1, 2014): 42–44. http://dx.doi.org/10.31399/asm.amp.2014-06.p042.

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Abstract A quench tank must contain sufficient fluid to quench the load without an excessive rise in temperature of the quenching fluid. This brief article describes the basics of sizing quench tanks for immersion quenching and offers a methodology for sizing the temperature-control system.

13

Wu, Chun Li, and Hai Liang Yang. "Finite Element Analysis of Quench Propagation Velocity in Bi-2223/Ag Superconducting Multifilamentary Tape." Materials Science Forum 546-549 (May 2007): 1931–34. http://dx.doi.org/10.4028/www.scientific.net/msf.546-549.1931.

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Quench propagation velocity is an important parameter to the stability and protection issues of superconducting magnet. In this paper, the finite element method (FEM) numerical simulation of quench propagation velocity has been performed for using the powerful analysis software COSMOS by establishing a suitable thermal analysis model of Bi-2223/Ag superconducting multifilamentary tape. The effects of quench energy and operating temperature on the quench propagation velocity have been studied. The analysis shows that the simulation result basically coincides with the experimental result.

14

Liu, Mengyun, Zhan Zhang, Francis Breton, and X. Grant Chen. "Quench Sensitivity and Phase Transformation Kinetics of AlSi7MnMg High Pressure Vacuum Die Casting." MATEC Web of Conferences 326 (2020): 02001. http://dx.doi.org/10.1051/matecconf/202032602001.

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The quench sensitivity of an AlSi7MnMg alloy in high-pressure vacuum die (HPVD) casting was investigated by time-temperature-transformation and time-temperature-property diagrams with an interrupted quench technique. The quench sensitive temperature range of the alloy is from 260 to 430 °C and its nose temperature is 350 °C. The mechanical strength versus cooling rates of the HPVD casting was predicted using quench factor analysis method and veriﬁed by experimental results. The critical cooling rate is 6 °C/s to remain 95% of the maximal mechanical strength. The coefﬁcients k2 - k5, related to the nucleation and precipitation kinetics of TTP curves, and phase transformation diagrams were determined. The precipitation of Mg2Si phase in the castings was observed during isothermal treatment using transmission electron microscope. Moreover, the quench sensitivity and kinetics of the phase transformation of AlSi7MnMg alloy and AlSi10MnMg alloys were compared. It reveals that the quench sensitivity and phase transformation rate of the former are lower than that of the latter.

15

Shuey, R. T., Murat Tiryakioğlu, Gary H. Bray, and James T. Staley. "Toughness after Interrupted Quench." Materials Science Forum 519-521 (July 2006): 1017–22. http://dx.doi.org/10.4028/www.scientific.net/msf.519-521.1017.

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We discuss data from a range of heat-treatable aluminum alloys, showing both yield strength and fracture toughness vs time at temperature of interrupted quench. Drop in toughness occurs at much shorter hold time than drop in strength. Concurrently the fracture becomes more intergranular. When later the yield strength falls, fracture becomes more transgranular, and toughness may rise. We attribute this pattern to two mechanisms: 1) Early quench precipitates nucleated on grain and/or subgrain boundaries grow to size sufficient to initiate fracture under tension, long before they withdraw significant solute from subsequent age-hardening. 2) Later quench precipitates nucleated on dispersoids and/or dislocations withdraw solute relatively uniformly, reducing matrix yield strength while increasing matrix ductility. We propose that quantitative modeling of change in strength and toughness with change in quench, requires multiple C-curves for multiple types of quench precipitates, and nonlinear relation of toughness to amount of boundary quench precipitate.

16

Liu, Mengyun, Zhan Zhang, Francis Breton, and X. Grant Chen. "Investigation of the Quench Sensitivity of an AlSi10Mg Alloy in Permanent Mold and High-Pressure Vacuum Die Castings." Materials 12, no. 11 (June 11, 2019): 1876. http://dx.doi.org/10.3390/ma12111876.

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The quench sensitivities of an AlSi10Mg alloy in permanent mold (PM) and high-pressure vacuum die (HPVD) castings were investigated with time–temperature–transformation and time–temperature–property diagrams using an interrupted quench technique. The quench-sensitive temperature range of the HPVD casting sample is 275–450 °C, and its nose temperature is 375 °C. The quench-sensitive range of the PM casting sample is 255–430 °C, and the nose temperature is 350 °C. The mechanical strength versus the cooling rate in both casting samples were predicted via a quench factor analysis and verified experimentally. The critical cooling rate of the HPVD casting sample is 20 °C/s whereas it is 17 °C/s for the PM casting sample. With a shorter critical time, higher nose temperature, and higher critical cooling rate, the HPVD casting sample exhibits a higher quench sensitivity than the PM casting sample. The differences in the quench sensitivities of the AlSi10Mg alloy due to the different casting processes is explained via the different precipitation behavior. At the nose temperature, coarse β-Mg2Si precipitates mainly precipitate along the grain boundaries in the HPVD casting sample, whereas rod-like β-Mg2Si precipitates distribute in the aluminum matrix in the PM casting.

17

Rossi, Lorenzo, Fausto Rossi, and Fabrizio Dolcini. "Real-space effects of a quench in the Su–Schrieffer–Heeger model and elusive dynamical appearance of the topological edge states." New Journal of Physics 24, no. 1 (January 1, 2022): 013011. http://dx.doi.org/10.1088/1367-2630/ac3cf6.

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Abstract The topological phase of the Su–Schrieffer–Heeger (SSH) model is known to exhibit two edge states that are topologically protected by the chiral symmetry. We demonstrate that, for any parameter quench performed on the half-filled SSH chain, the occupancy of each lattice site remains locked to 1/2 at any time, due to the additional time-reversal and charge conjugation symmetries. In particular, for a quench from the trivial to the topological phase, no signature of the topological edge states appears in real-space occupancies, independently of the quench protocol, the temperature of the pre-quench thermal state or the presence of chiral disorder. However, a suitably designed local quench from/to a SSH ring threaded by a magnetic flux can break these additional symmetries while preserving the chiral one. Then, real-space effects of the quench do appear and exhibit different dynamical features in the topological and in the trivial phases. Moreover, when the particle filling is different from a half and the pre-quench state is not insulating, the dynamical appearance of the topological edge states is visible already in a chain, it survives time averaging and can be observed also in the presence of chiral-breaking disorder and for instantaneous quenches.

18

Mariotto, S., and M. Sorbi. "Quench position reconstruction through harmonic field analysis in superconducting magnets." Superconductor Science and Technology 35, no. 1 (November 29, 2021): 015006. http://dx.doi.org/10.1088/1361-6668/ac39e8.

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Abstract The performances of superconducting magnets for particle accelerators are limited by instabilities or disturbances which lead to the transition of the superconducting material to the normal resistive state and the activation of the quench protection system to prevent damage to the magnet. To locate the position of the state transition, voltage taps or quench antennas are the most commonly used technologies for their reliability and accuracy. However, during the production phase of a magnet, the number of voltage taps is commonly reduced to simplify the construction process and quench antennas are generally used only for dipoles or quadrupoles to limit the antenna design complexity. To increase the accuracy in the reconstruction of the quench event position, a novel method, suitable for magnets with independent superconducting coils and quench protected without the use of quench heaters, is proposed in this paper. This method, based on standard magnetic measurement techniques for field harmonic analysis, can locate the position of the superconductor transition inside the magnet after the quench event when the magnet has been discharged. Analyzing the not allowed harmonics produced in the field quality at zero current, the position of the quenched coils can be retrieved for any magnet orders without increasing the complexity of the dedicated measurement technique.

19

Li, Zhi Hui, Bai Qing Xiong, Yon Gan Zhang, Xi Wu Li, Feng Wang, and Hong Wei Liu. "Quench Sensitivity and Quench-Induced Precipitation in High Strength 7xxx Series Aluminum Alloys." Advanced Materials Research 668 (March 2013): 907–11. http://dx.doi.org/10.4028/www.scientific.net/amr.668.907.

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This paper investigates the quench sensitivity of some selected 7xxx series Al alloys based on a Jominy End Quench method. The precipitate microstructures as a function of cooling rate during quenching are also characterized by using transmission electron microscopy (TEM). The results indicated that quench sensitivity and therefore the mechanical properties inhomogeneity in large plates or forgings can be predicted more accurately by the simultaneous combination of hardness and electrical conductivity measurements based on Jominy end quench. The hardness drop and conductivity increase in the novel alloy following a low cooling rate are much reduced compared to AA7050 and 7B04 because of a lower sensitivity to quench-induced precipitation on dispersoids. The novel alloy exhibited the least quench sensitivity, and the 7B04 Al alloy was the most quench sensitive. If the 90% of the maximum hardness is defined as the depth of quenching, the depth of 7B04 Al alloy, AA7050 through Jominy end quenching is about 20 and 55 mm respectively. Meanwhile, the depth of greater than 150 mm is achievable in the novel alloy, and hence it can be recommended to fabricate large section plates or forgings without compromising properties in the center of the part after a slow cool.

20

Martinovic, S., J. Majstorovic, V. Vidojkovic, and T. Volkov-Husovic. "Influence of the damage level during quenching on thermal shock behavior of low cement castable." Science of Sintering 42, no. 2 (2010): 211–19. http://dx.doi.org/10.2298/sos100518001m.

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In the recent decades, the use of unshaped monolithic refractories has been increasing greatly because of their significant advantages over other shaped refractory bricks of the same class. A low cement high alumina castable was synthetised and sintered at 1300?C in order to investigate thermal and mechanical properties, as well as thermal shock behavior. The water quench test was applied as an experimental method for thermal stability testing. Modification of the water quench test was performed by additional monitoring of the samples behavior during the water quench test such as implementation of image analysis and ultrasonic measurements. The image analysis program was applied on samples in order to measure the level of surface damage before and during the water quench test. Ultrasonic measurements were performed with the aim to measure the Young modulus of elasticity during the testing. Strength deterioration of the samples was calculated by the model based on ultrasonic velocity changes during the water quench test. The influence of monitoring the damage level before and during the quench experiment and its influence on thermal shock behavior will be discussed.

21

Ramírez-Rodríguez, Yon Govy, Nelly Ríos-Espino, and Eliana Gallardo-Echenique. "Quena amazónica: expresión artística y cultural en la música peruana." Revista Electrónica Complutense de Investigación en Educación Musical - RECIEM 19 (June 24, 2022): 121–39. http://dx.doi.org/10.5209/reciem.75752.

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La quena (también conocida por qqena, kena, kkena o kkhena) es un aerófono perteneciente a la familia de flautas o instrumentos de viento. Debido a su antigüedad, riqueza de variantes y sonido particular, el Instituto Nacional de Cultura del Perú (INC) declaró a la quena como Patrimonio Cultural Nacional, considerando su gran trascendencia en la música tradicional peruana. La quena amazónica es un instrumento que se origina a partir de la quena andina siendo sus estudios muy escasos. El propósito de este estudio fue analizar las percepciones de los docentes de música sobre la quena amazónica en las instituciones educativas de la provincia de Datem del Marañón, Loreto. Los métodos de investigación cualitativa se utilizaron en este estudio para abordar la pregunta de investigación. Un estudio de caso cualitativo fue el enfoque seleccionado para realizar el estudio. La entrevista cualitativa ha sido elegida como método para recopilar información de informantes clave (dos maestros de quena de una institución educativa) que tienen experiencias personales, actitudes, percepciones y creencias relacionadas con la quena amazónica. Los participantes recibieron una hoja informativa con detalles sobre el carácter voluntario de su participación, la confidencialidad y el anonimato, y la naturaleza y objetivos de la investigación. Este estudio utilizó el método de análisis temático para identificar temas, categorías, conceptos y significado. Los resultados indican que la quena amazónica es un instrumento importante ampliamente jugado en ceremonias y ocasiones festivas, donde preservan un papel y un simbolismo vinculados con la cultura popular y un fuerte sentido de identidad regional.

22

Waterman, Christopher A. "Chop and Quench." African Arts 31, no. 1 (1998): 1. http://dx.doi.org/10.2307/3337615.

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23

Arai, Shoshana R., Alice Butzlaff, Nancy A. Stotts, and Kathleen A. Puntillo. "Quench the Thirst." Biological Research For Nursing 16, no. 4 (October 16, 2013): 456–66. http://dx.doi.org/10.1177/1099800413505900.

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Thirst, as a symptom, has long been considered the most prevalent clinical complaint patients voice in healthcare settings. Yet, rarely have researchers examined thirst by its correlation with physiologic factors. This review was undertaken to examine the relationships between thirst ratings and factors mediating its primary physiologic correlates: plasma osmolality (pOsm) and arginine vasopressin peptide (AVP). A literature search was undertaken to identify clinical studies in human subjects that investigated the relationship of thirst to specific physiologic thirst-related correlates and associated thirst mediators. Thirst was induced in 17 selected clinical studies by hyperosmolar infusion, through water deprivation or exercise weight-loss regimens. Positive linear relationships between the subjects' thirst ratings and rising serum pOsm levels confirmed the presence of intact osmotic thirst drives. However, there were significant variations in normal compensatory rises in AVP levels that followed the rises in plasma osmolality after the subjects were exposed to cold, physical pre-conditioning and water immersion tests. Notably, older adults in the studies reported diminished thirst ratings. Weak correlations suggest that angiotensin II may play only a minor role in thirst mediation. Atrial natriuretic hormone's inhibitory effect on thirst was inconsistent. Findings indicated that older adults are at higher risk for profound dehydration due to sensory deficits along with failure to correct volume losses. The thirst trials results support the close correlation between serum pOsm values and patients' thirst ratings, with the exception of the older adult.

24

Mitra, Aditi. "Quantum Quench Dynamics." Annual Review of Condensed Matter Physics 9, no. 1 (March 10, 2018): 245–59. http://dx.doi.org/10.1146/annurev-conmatphys-031016-025451.

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25

Caux, Jean-Sébastien. "The Quench Action." Journal of Statistical Mechanics: Theory and Experiment 2016, no. 6 (June 27, 2016): 064006. http://dx.doi.org/10.1088/1742-5468/2016/06/064006.

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26

Doggen, Elmer V. H., and Jami J. Kinnunen. "Quench-induced delocalization." New Journal of Physics 16, no. 11 (November 24, 2014): 113051. http://dx.doi.org/10.1088/1367-2630/16/11/113051.

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27

Das, Sumit R. "Holographic quantum quench." Journal of Physics: Conference Series 343 (February 8, 2012): 012027. http://dx.doi.org/10.1088/1742-6596/343/1/012027.

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28

Kühnast, Wolfgang. "Quench im MRT: ein Phänomen der Kryophysik." Radiopraxis 14, no. 02 (June 2021): 73–82. http://dx.doi.org/10.1055/a-1189-9143.

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Dieser Artikel beschreibt eine kryophysikalische Besonderheit der supraleitenden Magnete – den Quench – mit dem Ziel, dieses Phänomen besser zu verstehen. Idealerweise können die Ursachen, die zu einem Quench führen, vermieden werden. Für den Fall, dass es zu einem Quench kommen sollte, werden Tipps gegeben die richtigen Maßnahmen einzuleiten, um größere Beeinträchtigungen sowohl des Patienten als auch an der Technik zu vermeiden.

29

Falorio, Iole, Edward A. Young, and Yifeng Yang. "Quench Characteristic and Minimum Quench Energy of 2G YBCO Tapes." IEEE Transactions on Applied Superconductivity 25, no. 3 (June 2015): 1–5. http://dx.doi.org/10.1109/tasc.2014.2375383.

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30

Trillaud, F., Min Cheol Ahn, J. Bascunan, Woo-Seok Kim, J. P. Voccio, and Y. Iwasa. "Quench Behavior, Quench Protection of a YBCO Test Coil Assembly." IEEE Transactions on Applied Superconductivity 18, no. 2 (June 2008): 1329–32. http://dx.doi.org/10.1109/tasc.2008.922278.

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31

Ogitsu, T., A. Terashima, K. Tsuchiya, G. Ganetis, J. Muratore, and P. Wanderer. "Quench observation using quench antennas on RHIC IR quadrupole magnets." IEEE Transactions on Magnetics 32, no. 4 (July 1996): 3098–101. http://dx.doi.org/10.1109/20.511531.

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32

Vermeiren, Vincent, and Annemie Bogaerts. "Plasma-Based CO2 Conversion: To Quench or Not to Quench?" Journal of Physical Chemistry C 124, no. 34 (August 5, 2020): 18401–15. http://dx.doi.org/10.1021/acs.jpcc.0c04257.

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33

Kurup, Vinod, Charles Witness Siyasiya, and Roelf Mostert. "Comparative Study of Quench and Partition Processes in High Si and High Al Steels." Materials Science Forum 1105 (November 29, 2023): 99–104. http://dx.doi.org/10.4028/p-5ncqhf.

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The quench and partition process is a means to develop third-generation high-strength steels using many possible process variants. In this work, two variants of quench and partitioning heat treatments, one-step and two-step, were carried out for high Si and high Al steel alloys. The kinetics of isothermal transformation occurring during the one-step quench and partition process were analysed using dilatometry. Experimental analysis revealed the swing-back phenomenon in high Si steel, and the transformation characteristics above and below the Ms temperature differed. The high Al alloy resulted in higher retained austenite (19%) compared to high Si steel (17%) during the one-step quench and partition process. Aluminium addition favoured bainite formation more than silicon addition. A comparison of two heat treatment variants shows the two-step quench and partition heat treatment seemed preferable as it produced more retained austenite (22%) in the high Si steel.

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Ranjbarrad, Samira, and Philip K. Chan. "The Effect of Conductive Heat Transfer on the Morphology Formation in Polymer Solutions Undergoing Thermally Induced Phase Separation." Polymers 14, no. 20 (October 15, 2022): 4345. http://dx.doi.org/10.3390/polym14204345.

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Owing to the fact that heat transfer during the thermally induced phase separation process is limited, a quench rate is inevitably entailed, which leads to the existence of temporal and spatial variations in temperature. Hence, it is of great importance to take into account the nonisothermality during the phase separation process, especially in high viscosity polymer solutions. In this study, the influence of conductive heat transfer on the morphology formation during the thermally induced phase separation process was investigated theoretically in terms of quench depth, boundary conditions, and enthalpy of demixing to elucidate the interaction between temperature and concentration through incorporating the nonlinear Cahn-Hilliard equation and the Fourier heat transfer equation in two dimensions. The Flory-Huggins free energy theory for the thermodynamics of phase separation, slow mode theory, and Rouse law for polymer diffusion without entanglements were taken into account in the model development. The simulation results indicated a strong interaction between heat transfer and phase separation, which impacted the morphology formation significantly. Results confirmed that quench depth had an indispensable impact on phase separation in terms of higher characteristic frequency by increasing the driving force for heat transfer. Applying quench from various boundaries led to a difference in the quench rate due to the high viscosity of the polymer solution. This led to a gradation in pore size and anisotropic morphology formation. The degree and direction of anisotropy depended on quench depth and rate, quench time, heat conduction rate inside the solution, solution viscosity, temperature evolution, and the enthalpy of demixing. It was also verified that the influence of enthalpy of demixing on phase separation could not be neglected as it increased the solution temperature and led to phase separation being accomplished at a higher temperature than the initial quench temperature.

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Lu, Yuan, Richard Sisson, and Michael Pershing. "Gas Quenching: Linking Steel Hardenability and Furnace Cooling Capability Tests." AM&P Technical Articles 175, no. 4 (May 1, 2017): 60–63. http://dx.doi.org/10.31399/asm.amp.2017-04.p060.

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White, Robert D., Aidan Beckett, Rishabh Chaudhary, Luisa Chiesa, Amish Desai, Odin Doolittle, Michael Emerling, Peter Moore, Makoto Takayasu, and Boning Zhang. "MEMS microphone arrays for quench detection in superconducting cables." Journal of the Acoustical Society of America 153, no. 3_supplement (March 1, 2023): A107. http://dx.doi.org/10.1121/10.0018325.

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An acoustic array is proposed as a quench detection method in superconducting magnets. A quench occurs when the current density in the superconductor exceeds a critical value, resulting in a loss of superconductivity and rapid local heating. This event is destructive and must be rapidly detected. It is thought that the quench may act as an acoustic source (Takayasu, 2019), which could be detected and localized by a microphone array inserted into the cryogenic coolant. A main advantage of this method is that acoustics propagate 1000 times faster than the normal zone propagation velocity in HTS conductors, providing for fast detection times. To demonstrate this concept, we first characterized the performance of a piezoelectric MEMS microphone and several potential preamplifiers under cryogenic conditions. An acoustic sense node was then constructed that operates down to 10 K. A cryogenic probe incorporating the MEMS array was used to study a quench event in a segment of a 2 mm wide REBCO tape. Quench experiments were carried out in a 7.6 cm diameter, 111 cm tall cryostat in Helium gas at 20 to 50 K. The MEMS array clearly detects a quench induced failure. Other observed acoustic features of unknown origin will be described.

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Xia, Yajun, Yuntao Song, Huajun Liu, Zhen Lu, Jinxing Zheng, Fang Liu, and Meng Song. "The Effect of Different Copper Discs on the Discharge of Superconducting Coils." Crystals 12, no. 8 (August 10, 2022): 1118. http://dx.doi.org/10.3390/cryst12081118.

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High temperature superconducting (HTS) magnets often work at high energy density and have slow quench propagation speed, so a quench will present a serious risk to the safety of magnets. The quench protection method based on the dump resistance can effectively reduce the current and release the energy in the HTS magnets. However, too large dump resistance may cause excessive voltage across the magnets. A quench protection system consisting of dump resistances and metal discs has been proposed. Copper discs are often embedded in HTS magnets for conducting cooling and mechanical support. In the discharging process of HTS magnets, the copper discs can absorb energy from the magnets through magnetic coupling, thus accelerating the current decay of the magnets. This quench protection method is more effective than using dump resistance alone. In this paper, the effect of different copper discs on the discharging process of HTS coils is discussed. Eight types of copper with different residual resistivity ratios (RRR) are applied. The results show that with the increase of the RRR of the copper disc, the current decay rate of the coil increases, and the energy absorbed by the copper disc from the coil increases. The role of different copper discs in the fast quench protection of the coil can be sorted as: RRR = 300 > RRR = 100 > RRR = 80 > RRR = 60 > RRR = 40 > RRR = 30 > RRR = 20 > RRR = 10. The copper disc with RRR of 300 shows the best performance in quench protection of HTS coils.

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ARKIN, H., and T. ÇELIK. "STUDY OF PHASE CONVERSION IN THREE-DIMENSIONAL q = 3 POTTS MODEL." International Journal of Modern Physics C 11, no. 07 (October 2000): 1313–20. http://dx.doi.org/10.1142/s0129183100001152.

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In order to see the phase conversion taking place in a weak first-order phase transition, we have simulated the q = 3 state Potts model in three dimensions and studied the time evolutions of oriented clusters forming after a rapid temperature quench. Our results indicate that the phase conversion mechanism following a deep temperature quench is spinodal decomposition while a rather shallow quench to temperatures near the phase transition point proceeds through usual nucleation.

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Verlaguet, Anne, and Fabrice Brunet. "Effect of incongruent dissolution on mineral solubility data derived from quench experiments." European Journal of Mineralogy 19, no. 6 (December 17, 2007): 783–89. http://dx.doi.org/10.1127/0935-1221/2007/0019-1772.

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ArslanHafeez, Muhammad, Muhammad Usman, Muhammad Adnan Arshad, and Malik AdeelUmer. "Nanoindentation-Based Micro-Mechanical and Electrochemical Properties of Quench-Hardened, Tempered Low-Carbon Steel." Crystals 10, no. 6 (June 15, 2020): 508. http://dx.doi.org/10.3390/cryst10060508.

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The nanoindentation technique is widely used to measure the micro-scale mechanical properties of various materials. Herein, the nanoindentation-based micro-mechanical and electrochemical properties of low-carbon steel were investigated after quench hardening and tempering processes. The steel was produced on a laboratory scale and subjected to quench hardening separately in two different media-water and brine (10 wt% NaCl)-and subsequent moderate temperature tempering. Microstructure analysis revealed that the lath martensite phase formed after all heat treatments, having different carbon percentages ranging from 0.26% to 0.58%. A ferrite phase was also observed in the microstructure in three different morphologies, i.e., allotriomorphic ferrite, idiomorphic ferrite, and Widmanstätten ferrite. Nanoindentation analysis showed that the brine quench hardening process provided a maximum twofold improvement in indentation hardness and a 51% improvement in stiffness with a 30% reduction in reduced elastic modulus compared with as-received steel. Electrochemical performance was also evaluated in a 1% HNO3 solution. The water quench-hardened and tempered sample exhibited the highest corrosion resistance, whereas the brine quench-hardened sample exhibited the lowest corrosion resistance among all heat-treated samples.

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Oh, S., S. Banerjee, and G. Yadigaroglu. "Reflooding With Steady and Oscillatory Coolant Injection: Part 2—Quench Front and Liquid Carryover Behavior." Journal of Heat Transfer 108, no. 2 (May 1, 1986): 448–56. http://dx.doi.org/10.1115/1.3246945.

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The reflooding of a tubular test section under oscillatory inlet flow conditions has been investigated experimentally for initial wall temperatures from 316° C to 760°C, oscillation periods from 2 to 6 s, and test section liquid level amplitudes up to 0.76 m. Compared to constant-injection reflooding, the oscillations always increase the liquid carryover rate in the early stages of reflooding. As reflooding progresses, the enhancement diminishes and becomes negative. The crossover point roughly coincides with saturation of the liquid at the quench front. The higher initial liquid carryover increases downstream heat transfer and speeds up quench front propagation, but it also reduces the test section mass accumulation rate, and for this reason delays quench front propagation at later stages. These effects are accentuated at higher oscillation amplitude and frequency. Large oscillations change the reflooding behavior substantially. Quantitative comparisons of quench front velocities and heat transfer immediately downstream of the quench front, obtained through the use of empirical local-condition correlations representing the steady-reflooding rate data, are presented.

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Breschi, M., L. Trevisani, M. Boselli, L. Bottura, A. Devred, P. L. Ribani, and F. Trillaud. "Minimum Quench Energy and Early Quench Development in NbTi Superconducting Strands." IEEE Transactions on Applied Superconductivity 17, no. 2 (June 2007): 2702–5. http://dx.doi.org/10.1109/tasc.2007.898373.

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Saravanan, M., M. Vasanth, Sampath Boopathi, M. Sureshkumar, and V. Haribalaji. "Optimization of Quench Polish Quench (QPQ) Coating Process Using Taguchi Method." Key Engineering Materials 935 (November 30, 2022): 83–91. http://dx.doi.org/10.4028/p-z569vy.

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In this research, the thickness of coating layer and hardness of coated 316L stainless steel surface has been improved by Quench Polish Quench (QPQ) coating process. The influences of nitriding Temperature(T), nitriding time(tc), and Oxidation time(to) on hardness and thickness of coated surface have also been investigated using Taguchi method. During this process, the percentage of carbonate and cyanate, post oxidation temperature, and time are constantly maintained. The experimental investigations have been performed using the Taguchi analysis to examine the effects and to predict the combination of optimum processing time settings. The nitriding time and temperature are significantly contributed to the hardness and maximizing the thickness respectively. The level-3 of all process parameters has been recommended to maximize the hardness (800 Hv) and layer thickness (19.6 µm). The microstructure of the Layer thickness on the coated stainless-steel surface has been illustrated using a Scanning Electron Microscope (SEM) image.

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Chen, Wei, Peng Song, Hao Jiang, Jiahui Zhu, Shengnan Zou, and Timing Qu. "Investigations on Quench Recovery Characteristics of High-Temperature Superconducting Coated Conductors for Superconducting Fault Current Limiters." Electronics 10, no. 3 (January 22, 2021): 259. http://dx.doi.org/10.3390/electronics10030259.

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Superconducting fault current limiters (SFCLs) are attracting increasing attention due to their potential for use in modern smart grids or micro grids. Thanks to the unique non-linear properties of high-temperature-superconducting (HTS) tapes, an SFCL is invisible to the grid with faster response compared to traditional fault current limiters. The quench recovery characteristic of an HTS tape is fundamental for the design of an SFCL. In this work, the quench recovery time of an HTS tape was measured for fault currents of different magnitudes and durations. A global heat transfer model was developed to describe the quench recovery characteristic and compared with experiments to validate its effectiveness. Based on the model, the influence of tape properties on the quench recovery time was discussed, and a safe margin for the impact energy was proposed.

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Chen, Nai Lu, Wei Min Zhang, Qiang Li, Chang Yin Gao, Bo Liao, and Jian Sheng Pan. "Optimization of Quench Tank Structure Based on CFD Simulation." Solid State Phenomena 118 (December 2006): 363–68. http://dx.doi.org/10.4028/www.scientific.net/ssp.118.363.

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In order to investigate the flow rate distribution and improve the flow rate uniformity of the quenchant in a quench tank, the ultrasonic Doppler velocimeter (UDV) was used to measure the flow rate of quenchant with agitation, and then a computational fluid dynamics (CFD) simulation was carried out to simulate the flow rate distribution without / with flow baffles. According to the CFD simulation results, the structures and positions of flow baffles in the draft-tube were optimized to obtain the uniform flow rate distribution in the quench zone, which were verified by experiments as well. The simulation and experimental results show that the UDV is suitable for measuring the flow rate of a large-size quench tank. This research provided a solid foundation for optimizing the structure design of flow baffles in production quench tanks.

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Noguchi, So, and Seok Beom Kim. "Stability of Toroidal SMES Using YBCO Tapes for Simultaneous Quench of a few Coils." Materials Science Forum 670 (December 2010): 3–10. http://dx.doi.org/10.4028/www.scientific.net/msf.670.3.

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We have investigated the stability of 2.0 GJ toroidal HTS-SMES, which consists of 90 element coils wound from YBCO tape. If one or more element coils are quenched, the storage energy reduces due to change of the magnetic field distribution. A series of quench for some element coils may occur, when the energy of the quenched coil cannot be consumed adequately. The simultaneous quench of some element coil may cause the system down. Therefore, it is necessary to investigate the simultaneous quench properties.

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Hasan, Hala S., Reham H. Khaleefah, Nasser A. Al haboubi, and Raad D. Salman. "Effect of Agitation, Temperature, and Quenching Medium on Cooling Curve and cooling rate for Steels." Al-Nahrain Journal for Engineering Sciences 21, no. 4 (December 20, 2018): 473–78. http://dx.doi.org/10.29194/njes.21040473.

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The control of quenching process has been investigated in this study by developing a quench system design to simulate the quenching process and measure the time – temperature history inside the sample during the cooling stage. The main purpose of this quench system is to evaluate the quench power of different quenchant at different conditions (type, temperature and agitation).A stainless steel sample was used with a suitable measurement as a probe in designing this quench system.The performance of two of quenchants (water and brine) with different conditions was investigated, and the designed probe was used to illustrate the effect of quenching parameters (quenchant type, temperature and its agitation) on cooling curves and cooling rate.The quenching system has proven its ability to work effectively and the results showed that heat transfer properties were significantly affected by quenchant parameters.

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Li, Hui, Jin Hu Sun, Qing Dong Zhong, Zhe Rui Huang, and Yu Lin Li. "Effect of the Bluing Solution on Corrosion Resistance of the Oxide Film Prepared in Steel." Materials Science Forum 893 (March 2017): 345–49. http://dx.doi.org/10.4028/www.scientific.net/msf.893.345.

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The process of Quench-bluing treatment on low-carbon steel were introduced. The continuity and corrosion resistance of the blue oxide film that is treated by different types of bluing solution and bluing solution with different concentrations of NaOH were evaluated by drip experiment and electrochemical test .The results show that Quench-bluing process can make the corrosion resistance better when use the solution of 500g/L NaOH and 150g/LNaNO2 as Quench liquid and 15% NaOH in the solution can form the blue oxide film with the best corrosion resistance.

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Clark, Andrew, Randy J. Bowers, and Derek O. Northwood. "Heat Treatment Effects on Distortion, Residual Stress, and Retained Austenite in Carburized 4320 Steel." Materials Science Forum 783-786 (May 2014): 692–97. http://dx.doi.org/10.4028/www.scientific.net/msf.783-786.692.

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The effects of heat treatment on distortion, residual stress, and retained austenite were compared for case-carburized 4320 steel, in both the austempered and quench-and-tempered condition. Navy C-ring samples were used to quantify both size and shape distortions, as well as residual stress. The austempering heat treatment produced less distortion and a higher surface residual stress. Both hoop and axial stresses were measured; the difference between them was less than seven percent in all cases. Depth profiles were obtained for residual stress and retained austenite from representative C-ring samples for the austempered and quench-and-tempered heat treatment conditions. Austempering maintained a compressive residual stress to greater depths than quench-and-tempering. Quench-and-tempering also resulted in lower retained austenite amounts immediately beneath the surface. However, for both heat treatments, the retained austenite content was approximately one percent at depths greater than 0.5 mm.

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De Sousa, Leonardo Fernandes, Luiz Eduardo Cabral Silva, Diego Fernando da Silva Paschoal, and Willian Tassio Gomes Novato. "Estudo de complexos de Zinco com quercetina em solução etanólica: uma abordagem entre teoria e experimento." Brazilian Journal of Development 8, no. 9 (September 27, 2022): 64442–59. http://dx.doi.org/10.34117/bjdv8n9-269.

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Um estudo teórico e experimental envolvendo reações de troca de ligantes cloretos por ligantes quercetinatos (QUERC‑) entre espécies de [Zn(H2O)(4-n)Cln](2-n) foi realizado e resultou em 4 tipos de complexos para análise: CPX1 – [ZnCl2(QUERC)]1- aniônico, CPX2 – (R/S)-[ZnCl(H2O)(QUERC)]0 neutro, CPX3 – [Zn(H2O)2(QUERC)]1+ catiônico e CPX4 – (R/S)-[Zn(QUERC)2]0 neutro. A partir de cálculos utilizando a Teoria do Funcional de Densidade (DFT) no nível B3LYP/6-31+G(2d)/IEF-PCM(UFF) foi possível constatar que CPX1 possui preferência na rota sintética em solução comparado as demais espécies, possuindo ΔHr = - 0,48 kcal mol-1 e ΔGr = - 4,23 kcal mol-1. CPX4 somente é favorecido pelo aumento entrópico TΔS = +8,52 kcal mol-1, proporcionado pelo efeito quelato. Os resultados experimentais das espectroscopias IV e UV-Vis são concordantes com os valores computacionais calculados. O modo de coordenação das espécies foi caracterizado em conjunto com os orbitais de fronteira descritos para os complexos abordados. A formação do complexo contribui para o efeito de ruptura do anel C da quercetina, e este efeito pode ser impedido quando o sistema é mantido com redução de temperatura e na ausência de luz.

Journal articles on the topic 'Quenc'

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