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Статті в журналах з теми "35NCD16"
1
Jha, Abhay K., K. Sreekumar, M. C. Mittal, and P. P. Sinha. "Failure of 35NCD16 steel fastener – A metallurgical investigation." Engineering Failure Analysis 16, no. 1 (January 2009): 302–8. http://dx.doi.org/10.1016/j.engfailanal.2008.05.003.
Повний текст джерела
2
Kurek, Marta, and Tadeusz Łagoda. "Estimation of Fatigue Life of Materials with Out-of-Parallel Fatigue Characteristics under Block Loading." Materials Science Forum 726 (August 2012): 181–88. http://dx.doi.org/10.4028/www.scientific.net/msf.726.181.
Повний текст джерелаАнотація:
The paper presents the algorithm of fatigue life estimation for materials with out-of-parallel fatigue characteristics under block loading. Brass CuZn40Pb2, medium-alloy steel 30CrNiMo8 and high-alloy steel 35NCD16 belong to such materials. Brass CuZn40Pb2 was used for analysis. The experimental results were compared with those calculated according to the assumed model, and satisfactory results were obtained.
3
Kurek, Marta, and Tadeusz Łagoda. "Fatigue Life Estimation under Cyclic Loading Including Out-of-Parallelism of the Characteristics." Applied Mechanics and Materials 104 (September 2011): 125–32. http://dx.doi.org/10.4028/www.scientific.net/amm.104.125.
Повний текст джерелаАнотація:
The paper presents an algorithm of fatigue life determination for materials with no parallel fatigue characteristics under pure bending and pure torsion. The presented model uses the iteration method, and the applied fatigue criterion is function of the ratio of normal and shear stresses coming from bending and torsion, respectively. Three materials were applied for analysis: CuZn40Pb2 brass, 30CrNiMo8 medium-alloy steel and 35NCD16 high-alloy steel.
4
Benaissa, Mohamed, Fethi Benkhenafou, Abdelkader Ziadi, Luis Borja Peral Martinez, Francisco Javier Belzunce, and Lyes Douadji. "The Effects of Shot Peening on the Surface Characteristics of 35NCD16 Alloy Steel." Periodica Polytechnica Mechanical Engineering 64, no. 3 (July 16, 2020): 199–206. http://dx.doi.org/10.3311/ppme.13229.
Повний текст джерелаАнотація:
Shot-peening is a surface mechanical treatment, widely used to treat metallic parts in the aerospace and automotive industries. This mechanical surface treatment should not be confused with other common applications of other peening treatments, oriented towards cleaning, preparation or surface finishing. Shot peening is a mechanical treatment used to improve the service life of metallic components, especially when they are submitted to cyclic loads. The effect of shot peening on the surface work hardening and residual stress profile of a 35NCD16 steel was studied in this work.
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Kurek, M., T. Łagoda, and F. Morel. "Estimation of the Fatigue Life of 35NCD16 Alloy Steel Under Random Loading." Materials Science 52, no. 4 (January 2017): 492–99. http://dx.doi.org/10.1007/s11003-017-9981-1.
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Gaci, Mounir, Fedaoui Kamel, Lazhar Baroura, and Amar Talhi. "Numerical study of TRIP transformation in 35NCD16 steel-effects of plate orientation and some criteria." Frattura ed Integrità Strutturale 16, no. 59 (December 22, 2021): 444–60. http://dx.doi.org/10.3221/igf-esis.59.29.
Повний текст джерелаАнотація:
This study aims to analyze the effect of thermo mechanical coupling damage in the presence of a phase change (austenite/martensite) in 35NCD16 steel. The impact of increasing mechanical traction load, accompanied by a martensitic transformation on the scale of a single grain with boundary has been studied. The prediction transformation of induced plasticity (TRIP) was evaluated by taking into account the following parameters: twenty shear directions of the martensitic plates, two values of the shear deformation of the martensitic plates, energetic and thermodynamics criteria for getting in order the transformation of the martensitic plates, elastoplastic behavior of the two areas in the first case (martensitic plate and grain boundary) and elastic behavior for the grain boundary in the second case. The numerical calculation is carried out using the finite element method (FEM), implemented in the Zebulon calculation code. The developed approach is validated using the available experimental results reported in the literature. The numerical results showed that the estimation of TRIP given by the energetics criteria with the values of the shear deformation (γ0 = 0.16) are closer to the experiment results.
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Pons, F., J. C. Pivin, and G. Farges. "Inhibition of tribo-oxidation preceding wear, by single-phased TiNx films formed by ion implantation into TiAl6V4." Journal of Materials Research 2, no. 5 (October 1987): 580–87. http://dx.doi.org/10.1557/jmr.1987.0580.
Повний текст джерелаАнотація:
Single-phased films of α-Ti1−x Nx, ∊-Ti2Nx, or δ-TiNx with a homogeneous composition on more than 400 nm were produced by ion implantation at several different energies in the TiAl6V4 alloy. Secondary ion mass spectroscopy (SIMS) profiles and ionic images recorded within the tracks after incremented cycles of friction against a 35NCD16 steel ball in air have shown that a Ti–O–C–N film is progressively formed on the surface of α solid solutions, while more concentrated nitride films resist oxidation. The friction and abrasion resistances of ∊ or δ nitride films are initially improved for a time lasting for as long as their N content increases, but they are finally self-destroying. On the contrary, the hardening effect of N in an α-Ti matrix keeps a really severe amount of abrasion from occurring during running in of the implanted surface, without suppressing the building up of a lubricant oxide hardened by N.
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Jimenez, Jose, and Lakhdar Taleb. "About the Memory of Transformation-Induced Plasticity in 35NCD16 Carbon Steel Subjected to Various Thermomechanical Histories." Metals 11, no. 12 (November 29, 2021): 1929. http://dx.doi.org/10.3390/met11121929.
Повний текст джерелаАнотація:
This study deals with Transformation-Induced Plasticity (TRIP) observed in the martensitic transformation of 35NCD16 ferritic steel. In this study, TRIP tests were carried out for two different cases: First, after only free dilatometric (FD) tests, which is used as the reference test for the considered applied stress; second, with TRIP tests being performed similarly to the first case (same thermal cycle, same applied stress) but with pre-thermomechanical loading histories applied. Such histories may be FD tests, TRIP tests, elastoplastic history, etc. The comparison between the results of TRIP test (a) and TRIP test (b) indicates if TRIP holds the memory of the applied loading histories. The current obtained results tell us that TRIP does not hold any significant memory. During the martensite → austenite transformation, the material may present recovery from strain hardening. Waiting for more details about the physical phenomena responsible for the absence of TRIP memory, one can point out the importance of this result as it enables one to use the same specimen for several TRIP tests. However, this result must be validated using other combinations of loading histories (such as multiaxial and cyclic, among others).
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Trevisiol, Céline, Abdeljalil Jourani, and Salima Bouvier. "Effect of hardness, microstructure, normal load and abrasive size on friction and on wear behaviour of 35NCD16 steel." Wear 388-389 (October 2017): 101–11. http://dx.doi.org/10.1016/j.wear.2017.05.008.
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Russo, Pasquale, Maria Tufariello, Raffaela Renna, Mariana Tristezza, Marco Taurino, Lorenzo Palombi, Vittorio Capozzi, Carlo G. Rizzello, and Francesco Grieco. "New Insights into the Oenological Significance of Candida zemplinina: Impact of Selected Autochthonous Strains on the Volatile Profile of Apulian Wines." Microorganisms 8, no. 5 (April 26, 2020): 628. http://dx.doi.org/10.3390/microorganisms8050628.
Повний текст джерелаАнотація:
In this investigation, we explored the oenological significance of Candida zemplinina (syn. Starmerella bacillaris) isolates from Apulian grape musts. Moreover, we provide the first evidence of the impact of different C. zemplinina strains on the wine aromatic properties tested as monocultures. We described the diversity of C. zemplinina strains isolated from grapes and the variability of ‘volatile’ phenotypes associated with this intraspecific variability. Thirty-three isolates were characterized at strain level by PCR-based approach and, among these, 16 strains were identified and then tested by microfermentation tests carried out in grape must. Analyzed strains were low producers of acetic acid and hydrogen sulphide, not able to decarboxylate a panel of representative amino acids, whereas they showed fructophilic character and significant glycerol production. Volatile profiles of produced wines were investigated by gas chromatography–mass spectrometry. The Odor Activity Values of all molecules were calculated and 12 compounds showed values above their odor thresholds. Two selected strains (35NC1 and 15PR1) could be considered as possible starter cultures since they were able to positively affect the sensory properties of obtained wine. This report firstly supplies evidence on the strain-specific impact of different C. zemplinina strains on the final aroma of produced wines.
Дисертації з теми "35NCD16"
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Dingremont, Norbert. "Analyse de la compatibilité des traitements de nitruration par voie ionique avec les dépôts par plaquage ionique : application à l'acier de construction 35NCD16 et à l'acier d'outillage pour travail à chaud Z38CDV5." Vandoeuvre-les-Nancy, INPL, 1996. http://www.theses.fr/1996INPL110N.
Повний текст джерелаАнотація:
Afin de déterminer dans quelle mesure les traitements de nitruration par voie ionique peuvent être compatibles aves les dépôts par plaquage ionique, nous avons analysé l'influence de la procédure de dépôt sur la stabilité des couches nitrurées. Ce travail a permis de montrer que le cycle thermique associé à la procédure de dépôt peut conduire à lui seul à la déstabilisation des couches de combinaison et seulement celles-ci. Dans ce cas, la stabilité thermique intrinsèque des couches de combinaison est mise en cause. Nous avons également mis en évidence la déstabilisation de ces mêmes couches lors de la réalisation de l'étape de décapage ionique effectuée sous plasma d'argon seul et ce, pour des températures de dépôt relativement basse (400°C). Ce phénomène conduit à la dénitruration des couches de combinaison et à la formation d'une interphase ferritique qui est à l'origine des problèmes d'adhérence observés lors de l'élaboration de revêtements durs. L’introduction d'une pression partielle d'azote contrôlée dans le plasma d'argon au début de l'étape de décapage permet de contourner ce problème, elle met également en évidence la présence d'espèces nitrurantes dans le plasma. Cette constatation nous a permis d'envisager l'étude de la faisabilité des traitements de nitruration dans les installations de dépôt BALZERS. Celle-ci a conduit à la réalisation des traitements plurifonctionnels de nitruration et de dépôt dans une même installation d'une part, en raison des gains cinétiques observés au niveau du traitement thermochimique et d'autre part, en raison d'une meilleure adhérence du dépôt sur les couches nitrurées. En effet, la transition entre les deux traitements ne nécessite pas une remise à l'air de l'installation ce qui réduit considérablement les risques de contamination interfaciale couche nitrurée - revêtement. En second lieu, l'élévation des vitesses de nitruration, provenant d'une plus grande réactivité des faisceaux de plasma à haute densité de courant, a permis d'industrialiser de façon rentable ce nouveau procède de traitement plurifonctionnel
2
Jimenez, Reyes Jose. "Experimental and numerical contribution to the study of transformation induced plasticity (TRIP)." Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMIR20.
Повний текст джерелаАнотація:
Ce travail a été réalisé dans le but d'apporter une contribution à l'étude de la plasticité induite par transformation (TRIP) à travers des analyses expérimentales et numériques. Pour ce faire, du point de vue expérimental, un programme expérimental original sur l'acier 35NCD16 observant les comportements des transformations austénite → martensite est réalisé sous différentes conditions de chargement. Les résultats indiquent que : (i) le TRIP n'a pas d'effet mémoire significatif, (ii) le matériau peut présenter une récupération de l'écrouissage pendant la transformation martensite → austénite, (iii) une dissymétrie entre les réponses du TRIP en tension et en compression a été observée, (iv) l'existence d'une contre-contrainte du TRIP a été révélée, (v) la quantité de TRIP final peut être considérée comme proportionnelle à la norme de la contrainte appliquée tant que cette dernière ne dépasse pas la limite d'élasticité, et (vi) une légère orientation physique a toutefois été observée lors de l'analyse microstructurale de notre matériau, ce qui pourrait suggérer une faible contribution du mécanisme de Magee dans le TRIP. Quant au côté numérique, les capacités prédictives du modèle Leblond – Taleb – Sidoroff (LTS) et de sa version actualisée (U – LTS) sont mises à l'épreuve en simulant les essais expérimentaux réalisés dans le cadre de cette étude. Nos résultats montrent que (i) le modèle LTS surestime les résultats expérimentaux, (ii) le modèle LTS ne parvient pas à décrire la dissymétrie entre les réponses TRIP en tension et en compression, (iii) en utilisant le modèle U – LTS, les résultats comparatifs montrent d'excellentes capacités à simuler la base de données expérimentale réalisée dans ce travail, en particulier par rapport au modèle LTS. Bien que nos résultats expérimentaux aient montré des résultats significatifs, en particulier lorsqu'ils sont comparés aux modèles observés dans notre étude, il est recommandé de poursuivre les recherches en prenant en compte d'autres aciers et d'autres transformationsThis thesis has been created with the objective of providing a contribution to the study of transformation induced plasticity (TRIP) via experimental and numerical analyses. To do so, from the experimental point of view, an original experimental program on 35NCD16 steel observing the behaviors of austenite → martensite transformations were performed under different loading conditions. The results indicate that: (i) TRIP does not hold any significant memory effect, (ii) the material may present recovery from strain hardening during the martensite → austenite transformation, (iii) a dissymmetry between the TRIP responses under tension and compression were observed, (iv) the existence of TRIP backstress was revealed, (v) the amount of final TRIP may be considered proportional to the norm of the applied stress as long as the latter does not exceed the yield stress, and (vi) a slight physical orientation has however been observed when carrying out microstructural analyses on our material, which could suggest a small contribution of the Magee mechanism in TRIP. As for the numerical side, the predictive capabilities of the Leblond – Taleb – Sidoroff (LTS) model, and its updated version (U – LTS) are put to the test by simulating the experimental tests performed for this study. Our results show that: (i) the LTS model overestimates the experimental results, (ii) the LTS model fails in describing the dissymmetry between the TRIP responses under tension and compression, (iii) when using the U – LTS model, the comparative results show excellent capabilities in simulating the experimental data base performed in this work, especially compared to the LTS model. While our experimental results showed significant results, especially when put up against to the models observed in our study, further research considering other steels and other transformations is recommended
3
Meftah, Salem. "Modélisation de la plasticité due à une transformation martensitique dans les aciers." Phd thesis, INSA de Rouen, 2007. http://tel.archives-ouvertes.fr/tel-00604502.
Повний текст джерелаАнотація:
Cette thèse porte sur l'analyse d'un phénomène particulièrement important dérivant des conséquences mécaniques des transformations de phases solide-solide dans les aciers : la plasticité de transformation ou TRIP (Transformation Induced Plasticity) et son interaction avec la plasticité classique. Ce sujet est abordé à la fois par des investigations expérimentales et par une approche de modélisation numérique, pour les transformations martensitiques.
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Meftah, Salem. "Modélisation de la plasticité due à une transformation martensitique dans les aciers." Electronic Thesis or Diss., Rouen, INSA, 2007. http://www.theses.fr/2007ISAM0026.
Повний текст джерелаАнотація:
Cette thèse porte sur l'analyse d'un phénomène particulièrement important dérivant des conséquences mécaniques des transformations de phases solide-solide dans les aciers : la plasticité de transformation ou TRIP (Transformation Induced Plasticity) et son interaction avec la plasticité classique. Ce sujet est abordé à la fois par des investigations expérimentales et par une approche de modélisation numérique, pour les transformations martensitiquesThis thesis concerned with the analysis of a particularly important phenomenon which corresponds to one of the mechanical consequences of solid-solid phase transformations in steels: the transformation plasticity or TRIP (TRansformation Induced Plasticity) and its interaction with classical plasticity. This subject is addressed from the point of view of experimental investigations as well as with a nuimerical modelling approach, concerning martensitic transformations
5
Wu, Dont-Pee, and 吳東壁. "The Analysis of Microstructure Characteristics and Fatigue Properties of 35NCD16 Alloy Steel." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/00719017215923312363.
Повний текст джерелаАнотація:
碩士國立成功大學
機械工程研究所
81
The purpose of this thesis is to discuss the fatigue characteristics, microstructures and fracture modes of 35NCD16 steel under the control variable of strain and stress. The material was quenched first, then it was tempered at 350℃, 550℃ and 750℃ to produce the different tempering maternsite structure of precipitate carbide. In order to understand the effect which are made by tempering temperature and microstructure on these mechanical properties, a MTS810 dynamic material testing system is used to test tensile and fatigue property. The strain amplitude of low cycle fatigue are between 0.4% to 1.4%. The stress amplitudes of high cycle fatigue are between 450 to 900 MPa. Tensile specimens are deformed at the constant strain rate of 10-3S-1. After testing , the fracture mode and microstructure are analyed with SEM and TEM, the results are combined with that of macroscopic. The experimental results indicate that the martensite structure and precipitate carbide of 35NCD16 steel change as the tmpering temperature. If the tensile behaviour is taken into consideration, it is found that the more the tempering is low, the more the strength hradness and work hardening cofficient are high, but higher tempering produce brittle easily, and that sample show the best combination of strength and toughness at 550℃.After tempering at three various temperature, low cycle and high cyclefatigue life decrease as the increase of strain and stress amplitude. Under the same strain amplitude, those temperied at 750℃ have the best low cycle fatigue property. Under the same stress amplitude, those tempered at 350℃ have the best high cycle fatigue property. The fatigue striation shows apparently on the fracture surface of samples under all of the tested stress and strain amplitudes . The dislocation cell structure ususally appears on the condition of bigger strain and stress amplitude and higher work hardening coefficient of the samples tempered at 350℃ and 550℃.
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Lam, Hon-Fai, and 林漢輝. "The analysis of microstructure characteristics and mechanical properties of 35NCD16 alloy steel under quasi-static and dynamic compression loading conditions." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/20307735199540287489.
Повний текст джерелаАнотація:
碩士國立成功大學
機械工程研究所
81
The purpose of this thesis is to investigate the misro- structure characteristics and mechanical properties of (NF) 35NCD16 high strength alloy steel under quasi-static and dynamic compression loading conditions. At the same time, deformation constitutive equation is used to descibe the plastic deformation behaviour of material properties. Quasi- static mechanical tests adopt the SAGINOMIYA 100 tons forging machine for testing material at low strain rate from 10^-2 to 1 s^-1, and the strainrange from 10% to 80%. Fro dymanic tests, one dimensional elastic wave theory as analysis a basis and the Hopkinson bar tester device are used to invesgate the impact properties of present material at high strain rate from 10^2 to 5*10^3 s^-1 and a low defor- mation from 5% to 25%.Form the result of mechanical tests analysis, it is found that the flow stress increases with the rise of strain rate. The strain rate sensitivity and the activation volume are changed with the incresing of strain rate and strain. Therefore, the different strain rate regions for deformation mechanism can be distinguished. The material deformation is maniniy controlled by thermally activated mech- anism as the strain rate regions for deformation is mainly controlled by thermally activated mechanism as the strain rate less than 10^3 s^-1. If the strain rate is larger than 10^3 s^ -1, the thermally activated meshanism will transform to a dis- location drag mechanism. Microstructural evaluation are made by (OM) AND (SEM) for observing the metallographic structer and the fracture behaviour.Furthermore, with (STEM), microstructure of this material, such as dislocation desity and dislocation cells is analysed and observed.
Тези доповідей конференцій з теми "35NCD16"
1
Sarnet, T., and M. Autric. "Corrosion Resistance Improvements of Metallic Alloys Using One-Step Excimer Laser Treatment." In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/cleo_europe.1996.cwf64.
Повний текст джерелаАнотація:
This study concerns the structural modifications of metallic alloys such as aluminum alloys, titanium alloys and steels in order to improve their mechanical and physic-chemical properties. These modifications induce changes in the lifetime of these metallic samples as far as the corrosion resistance is concerned. Effects have been studied as a function of incident energy density, overlapping, number of pulses using a KrF excimer laser (20 ns; 80 W; 248 nm). Structural modifications analysed by low-incidence X-ray diffraction have been observed for all materials with micro and nano-structures formation due to the high values of the cooling rate (>108 K.s−1). The most interesting structures were, for instance, the titanium Ti6Al4V (α+β) which after processing becomes a fine lath martensitic structure which has a thickness of approximately of 250 nm, and also steel 35NCD16 (ferrite+perlite) which is austenitic+martensitic after treatment. An investigation was carried out after scanning large surfaces into corrosion resistance of these metallic materials. Electrochemical tests -anodic polarisation- revealed a significant increase in the resistance to pitting of the aluminum alloys. This improvement is due to the dissolution of khatyrkite phase in the matrix leading to a redistribution of the copper atoms within the melted layer (few microns). On the other hand, 2017A aluminum can be slightly softened by the processing. In the opposite, for other materials a hardening can occur. This hardening can be weak and due to a simple grain refinement, as is the case for the 1050A aluminum. This hardening is significant when treating the Ti6A14V titanium and even more so for the 35NCD16 steel which goes from 250HV to almost 1000HV, which is impossible to obtain with classic thermal processes. In the case of 35NCD16 steel samples, the gain in the corrosion resistance is due to change in the structure and due to a galvanic coupling between the irradiated and the non irradiated zones.