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Добірка наукової літератури з теми "Alloy blend"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "Alloy blend"

1

Jiang, Shui Qing. "Preparation of PMMA/PP/ PP-g-MAH Alloy." Advanced Materials Research 1061-1062 (December 2014): 30–34. http://dx.doi.org/10.4028/www.scientific.net/amr.1061-1062.30.

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Studies of the polypropylene grafted with malefic anhydride PP-g-MAH as compatibilizer to toughening polypropylene PP and PMMA blends. When PP/PMMA fixed ratio of 80/20, the effects of PP-g-MAH content on the blend morphology, mechanical properties and thermal properties. With the increase of PP-g-MAH content, strength and impact strength, tensile strength, PMMA/PP/PP-g-MAH blends were first increased and then decreased, and in the PP-g-MAH for 5 copies and reached the maximum value; while the flexural strength increased. The impact strength of the alloy compared with the alloy without the addition of compatibilizer increased about 30%, the tensile strength, bending strength increase obviously. That PP-g-MAH has effects on the morphology and properties of PMMA/PP/ PP-g-MAH blend system.
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2

Green, Peter F., and Edward J. Kramer. "Diffusion in Polymer Alloy Melts." MRS Bulletin 12, no. 8 (December 1987): 42–47. http://dx.doi.org/10.1557/s0883769400066744.

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AbstractDiffusion in polymer alloys or blends can be used to extract information on the fundamentals of the dynamics of individual polymer chains in the melt and the thermodynamics of the interaction between unlike polymer species. The dynamics of individual chains are available from measurements of the tracer diffusion coefficients, D*, of the various species while the thermodynamics of interaction, represented by the Flory parameter, x, can be obtained from measurements of the mutual diffusion or interdiffusion coefficient, D. We will show that these quantities can be measured conveniently by forward recoil spectrometry (FRES), an ion beam analysis technique that can determine the concentration versus depth profile of polymers labeled with deuterium diffusing into unlabeled polymer matrices.For high enough molecular weight of the matrix, the tracer diffusion coefficient of both species in the blend scale as D0N−2, where N is the number of monomer segments per diffusing chain; the constant D0, however, can differ by more than 104 for chemically different molecules diffusing in the same blend, suggesting that conventional concepts of chain dynamics in melts, such as monomer friction coefficients, need to be reexamined. The mutual diffusion coefficient is controlled by the faster species in the blend (the one with the larger D*N product) in agreement with what was found in metallic alloys (but in sharp disagreement with the “slow” theory of mutual diffusion which predicts that the slower species controls). Since the combinatorial (ideal) entropy of mixing of polymers is low, the thermodynamic driving force for diffusion is dominated by enthalpy and excess entropy of mixing (x) to a degree unprecedented for atomic or small molecule systems. This means that one can observe not only a thermodynamic “slowing down” of diffusion when x becomes positive as one nears the spinodal but also a large thermodynamic “speeding up” of diffusion when x is negative. Measurements of mutual diffusion turn out to be one of the most sensitive methods available for measuring x.
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3

Strauch, Anna Luise, Volker Uhlenwinkel, Matthias Steinbacher, Felix Großwendt, Arne Röttger, Abootorab Baqerzadeh Chehreh, Frank Walther, and Rainer Fechte-Heinen. "Comparison of the Processability and Influence on the Microstructure of Different Starting Powder Blends for Laser Powder Bed Fusion of a Fe3.5Si1.5C Alloy." Metals 11, no. 7 (July 12, 2021): 1107. http://dx.doi.org/10.3390/met11071107.

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This paper examines different blends of starting materials for alloy development in the laser powder bed fusion (LPBF) process. By using blends of individual elemental, ferroalloy and carbide powders instead of a pre-alloyed gas-atomized starting powder, elaborate gas-atomization processes for the production of individual starting powders with varying alloy compositions can be omitted. In this work the model alloy Fe3.5Si1.5C is produced by LPBF from different blends of pure elemental, binary and ternary powders. Three powder blends were processed. The base material for all powder blends is a commercial gas-atomized Fe powder. In the first blend this Fe powder is admixed with SiC, in the second with the ternary raw alloy FeSiC and in the third with FeSi and FeC. After characterizing the powder properties and performing LPBF parameter studies for each powder blend, the microstructures and the mechanical properties of the LPBF-manufactured samples were analyzed. Therefore, investigations were carried out by scanning electron microscopy, wave length dispersive x-ray spectroscopy and micro hardness testing. It was shown that the admixed SiC dissolves completely during LPBF. But the obtained microstructure consisting of bainite, martensite, ferrite and retained austenite is inhomogeneous. The use of the lower melting ferroalloys FeSi and FeC as well as the ternary ferroalloy FeSiC leads to an increased chemical homogeneity after LPBF-processing. However, the particle size of the used components plays a decisive role for the dissolution behavior in LPBF.
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M. Maruthi Rao and NVVS Sudheer. "Experimental investigation of heat treated alloy for hardness using multiple linear regression model." Open Journal of Science and Technology 5, no. 1 (October 10, 2022): 1–6. http://dx.doi.org/10.31580/ojst.v4i4.1683.

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Quenching media, temperature and time plays vital role to improve the mechanical properties of metal and alloys. Tap water blend with cow urine different compositions hot metal at different temperature interval and quenched the blend and find the hardness values Al 2585 alloy. Cow urine contains different ingredients to enhance the mechanical properties of the meal and alloy. Ingredients like sodium and silicon some other elements present homogeneously improve properties like tensile strength, yield strength and hardness. Sodium refine the micro structure and silicon interlocking the grain boundaries of the metal. The model defined the relationship existing between the two variables of % of blend and temperature of specimen and hardness value, the dependent variables. This was correlated with existing theories are the relationship between Hardness and two variables. A analytical model was developed for the fore casting of hardness, it was proved and certified to be a positive valuation tool for estimating the hardness on the heat treatment process.
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5

SAKANO, Hajime, Hiromichi AOKI, Hideki YAMAGUCHI, and Yasunobu TAKAGAWA. "Alloy Blend Composites. Weld Strength and Phase Structure of ABS/PBT Alloy." Seikei-Kakou 9, no. 6 (1997): 404–8. http://dx.doi.org/10.4325/seikeikakou.9.404.

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6

SAKANO, Hajime, Takayoshi FUJIWARA, Kiyoshi OGURA, and Masato YANO. "Alloy Blend Composites. Weld Strength and Phase Structure of ABS/PA6 Alloy." Seikei-Kakou 9, no. 6 (1997): 409–13. http://dx.doi.org/10.4325/seikeikakou.9.409.

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7

Ramosena, Lekhetho Ambition, Thywill Cephas Dzogbewu, and Willie du Preez. "Direct Metal Laser Sintering of the Ti6Al4V Alloy from a Powder Blend." Materials 15, no. 22 (November 18, 2022): 8193. http://dx.doi.org/10.3390/ma15228193.

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Additively manufactured Ti6Al4V parts have only seen major application in industries such as the aerospace and medical industries, mainly due to the high cost of production of the feedstock powder. In this article, the feasibility of in situ alloying a powder blend of elemental Ti and an Al–V master alloy to produce the Ti6Al4V alloy through direct metal laser sintering is presented and discussed. In a previous study, single track formation from this powder blend was studied and analyzed to determine the optimum principal process parameters suitable for this powder blend. These process parameters were employed in this study to produce single and double layers where the effects of varied hatch distance and the employment of a rescanning strategy on the surface morphology and alloy homogeneity were investigated. Lastly, in the current study, three-dimensional specimens were produced and analyzed to determine the alloy microstructure, homogeneity, part porosity and mechanical properties. The analyses revealed that a Ti6Al4V alloy with a density of up to 99.9% and corresponding tensile strength and ductility values of up to 942.9 MPa and 17% was produced. Furthermore, a minimum Al evaporation value of 7.2% was recorded. Therefore, in situ alloying can indeed be employed to produce high-quality Ti6Al4V parts from an elemental Ti and an Al–V master alloy powder blend.
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8

Gopi, Jineesh Ayippadath, and Golok Bihari Nando. "REACTIVE COMPATIBILIZATION OF THE BLENDS OF THERMOPLASTIC POLYURETHANE AND POLYDIMETHYLSILOXANE RUBBER." Rubber Chemistry and Technology 88, no. 4 (December 1, 2015): 584–603. http://dx.doi.org/10.5254/rct.15.84885.

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ABSTRACT The effect of ethylene-co-methacrylate (EMA) as polymeric chemical compatibilizer on the mechanical, dynamic mechanical, phase morphology, adhesion, and rheological properties of the blends of thermoplastic polyurethane (TPU)–polydimethylsiloxane rubber (PDMS) was investigated at different blend ratios. Melt blending technique was used to prepare the compatibilized blends. Enhancement of the mechanical properties and the reduction of dispersed PDMS domain size in the alloy confirmed the compatibilization effect of EMA on TPU-PDMS blends. Dynamic mechanical properties such as storage modulus, loss modulus, and the damping factor were evaluated to assess the compatibilization effect of EMA on TPU-PDMS blends. Creep tests revealed that compatibilization led to better dimensional stability. Compatibilized blends with finer PDMS rubber domains showed relatively less reduction in storage modulus as compared with uncompatibilized blends during stress relaxation studies. Rheological analysis suggested that the incorporation of EMA decreased the interfacial slip between the blend constituents, and this also confirmed the compatibilization effect of EMA on TPU-PDMS rubber blends as a polymeric reactive compatibilizer.
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9

HORIUCHI, Toru, Hideki YAMANE, Masaoki TAKAHASHI, and Tatsuki MATSUO. "Alloy Blend Composites. Effects of Wear Morphology on Tribological Properties of Polyamide 6/Polyolefin Blends." Seikei-Kakou 9, no. 6 (1997): 425–33. http://dx.doi.org/10.4325/seikeikakou.9.425.

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10

Luo, Yi Fei, Yue Huang Xie, Jia Miao Liang, and De Liang Zhang. "Preparation, Microstructure and Properties of Ti-6Al-4V Rods by Powder Compact Extrusion of TiH2/Al60V40 Powder Mixture." Key Engineering Materials 770 (May 2018): 116–25. http://dx.doi.org/10.4028/www.scientific.net/kem.770.116.

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Анотація:
Ti-6Al-4V (wt.%) alloy rods were prepared successfully using a low-cost and short powder metallurgy process that involves mixing TiH2 and Al60V40 powders, compacting the powder blend and extruding the powder compact at elevated temperatures. The microstructure and mechanical properties of Ti-6Al-4V alloy and the effects of particle size, oxygen content and heat treatment on them were investigated. The results showed that the microstructure and homogeneity of the extruded rods were strongly affected by the particle size of TiH2/Al60V40 powder blends. By changing tumbler mixing into low-energy ball milling, the TiH2/Al60V40 particle sizes decreased, and the volume fraction of undissolved V rich particles in the microstructure of the extruded rod substantially decreased from 8.6% to zero. High yield strength and ultimate tensile strength of 1154 and 1353 MPa respectively with a moderate elongation to fracture of 3.6% are achieved with the Ti-6Al-4V rod prepared by using the powder blend. The extruded Ti-6Al-4V rod prepared using the ball milled powder had a very high strength, but limited ductility due to a high oxygen content. Solution treatment and aging slightly increase the strength of Ti-6Al-4V rods at the cost of dramatic decrease of ductility.
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Дисертації з теми "Alloy blend"

1

Bandeira, Rafael Marinho. "Estudos da proteção à corrosão da liga de alumínio AA7075-T6 por revestimentos a base de polianilina." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-29092017-174148/.

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Neste trabalho foram formados, sobre uma superfície de liga de alumínio AA7075-T6, revestimentos de polianilina (PANI) e da blenda polianilina/policloreto de vinila na proporção massa-massa de 1/1 (PANI/PVC 1/1), com diferentes espessuras. Os revestimentos foram avaliados quanto as suas habilidades na proteção da corrosão da liga de alumínio. Utilizou-se uma solução de NaCl 3,5%, como solução corrosiva em todos os ensaios de corrosão. A espessura dos revestimentos de PANI foi variada de 5 a 35 µm e estudou-se a relação entre espessura, rugosidade e hidrofobicidade e a proteção por estes revestimentos. Os revestimentos com espessuras de 12 a 23 µm apresentaram menor rugosidade, maior ângulo de contato e melhor proteção da corrosão verificada por medidas eletroquímicas, tais como espectroscopia de impedância eletroquímica e polarização linear. As imagens obtidas por microscopia eletrônica de varredura mostraram que os revestimentos de PANI são homogêneos e que não exibiam defeitos decorrentes da exposição no ambiente corrosivo. Já a blenda, apresentou um desempenho maior na proteção da corrosão quando comparado com a PANI pura. Medidas de espectroscopia de impedância eletroquímica e de polarização linear mostraram que a blenda possui alta resistência de polarização, com potenciais de corrosão estáveis e deslocados à região anódica para os eletrodos com revestimentos de maior espessura (26,3 ± 0,9 µm). Imagens obtidas por microscopia eletrônica de varredura e de força atômica, juntamente com a análise de composição por espectroscopia de energia dispersiva de raios-X (EDX) contribuíram para entender a maior eficiência de proteção promovida pela blenda.
In this study, an aluminum alloy (AA7075-T6) was coated with polyaniline (PANI) and polyaniline/polyvinyl chloride (PANI/PVC in 1:1 ratio by mass) blend coatings of different thickness. These coatings were evaluated for their ability to protect the aluminum alloy against corrosion. For studying the corrosion of aluminum alloy in saline environment, a 3.5% NaCl solution was used in all the corrosion tests. The thickness of PANI-based films was varied between 5 to 35 µm and the effect of film thickness, roughness and hydrophobicity on the corrosion protection properties of the coatings was evaluated. The coatings with thickness between 12 and 23 µm exhibited lower roughness, higher contact angles and better corrosion protection as confirmed by electrochemical measurements such as electrochemical impedance spectroscopy and linear polarization. Morphological analysis by scanning electron microscopy confirmed that the PANI coatings are homogeneous and present almost no defects upon exposure to the corrosive environment. Compared to pure PANI coatings, the coatings consisting of PANI/PVC blend presented better performance against corrosion. Electrochemical impedance spectroscopy and linear polarization measurements showed that the blends have high polarization resistance with stable corrosion potentials that are shifted to the anodic region for the electrodes with thicker coatings (26.3 ± 0.9 µm). Surface analysis by scanning electron microscopy, atomic force microscopy and elemental analysis by energy-dispersive X-ray spectroscopy were used to gather information that helped understanding the better corrosion resistance of PANI/PVC coatings.
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2

BOSIO, FEDERICO. "Laser Powder Bed Fusion of AlSi10Mg+4Cu and AlSi10Mg alloys." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2898034.

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3

Bergamini, Paula Aparecida. "Reciclagem de policarbonato por meio da composição de blendas de ABS/PC." Universidade Presbiteriana Mackenzie, 2015. http://tede.mackenzie.br/jspui/handle/tede/1360.

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Made available in DSpace on 2016-03-15T19:36:55Z (GMT). No. of bitstreams: 1 Paula Aparecida Bergamini.pdf: 11467964 bytes, checksum: f444fac5ebd5632e2cdcc942570f6e37 (MD5) Previous issue date: 2015-08-10
This study proposes the production and characterization of blends of ABS/PC through reuse of discarded PC in the automotive panel production process. The developed alloy ratios are (ABS/PC) 30/70, 50/50 and 70/30, in addition to the neat materials. For comparative purposes the mixtures were developed for both materials recycled PC (PCr) and neat PC (PCn). The blends were processed in a twin screw extruder under controled heating temperature.
Este estudo propõe a produção e caracterização de blendas de ABS/PC por meio do reuso do policarbonato (PC) descartado no processo de produção de painéis automotivos. As proporções de mistura desenvolvidas para estudo foram (ABS/PC) 30/70, 50/50 e 70/30, além dos materiais puros. Para efeitos comparativos, as misturas foram desenvolvidas tanto com o PC reciclado (PCr) como com o PC natural (PCn). As blendas foram processadas em extrusora de dupla rosca, sob temperatura controlada.
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4

Shi, Min. "Growth of AlInN and zinc blende GaN by molecular beam epitaxy." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/HKUTO/record/B39558873.

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5

Shi, Min, and 施敏. "Growth of AlInN and zinc blende GaN by molecular beam epitaxy." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39558873.

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6

Nilsson, Christine. "Article 7 TEU : A Human Rights Defender or a Political Blind Alley?" Thesis, Uppsala universitet, Juridiska institutionen, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-200435.

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7

Farrell, Michael P. "Polymer blends formed by the solid state mechanical alloying process." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-12042009-020316/.

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8

Bowden, Roy Edward. "The problems of boy labour and blind-alley occupations within the context of the labour markets of Brighton and Portsmouth, 1870-1939." Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242578.

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9

Абдулкеримов, Илимдар Диляверович. "Технологическое обеспечение качества резьбовых соединений в глухих отверстиях деталей из алюминиевых сплавов деформирующим инструментом". Thesis, НТУ "ХПІ", 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/20297.

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Диссертация на соискание учёной степени кандидата технических наук по специальности 05.02.08 – технология машиностроения. Национальный технический университет "Харьковский политехнический институт", Харьков, 2016. Диссертация посвящена решению научно-технической задачи технологического обеспечения герметичности резьбовых соединений деталей из алюминиевых сплавов с газо-усадочной пористостью деформирующим инструментом. В работе проведен анализ существующих систем обработки глухих отверстий в алюминиевых сплавах из газо-усадочных материалов, выявлены основные факторы, определяющие качество и производительность процесса обработки отверстий. Показано, что для таких процессов как обеспечение необходимых эксплуатационных характеристик соединений нужно управлять параметрами состояния поверхностного слоя в процессе их изготовления, а также уметь рассчитывать их на стадии проектирования технологического процесса. Показано исследование технологических свойств алюминиевого сплава АК12М2, полученного литьем под давлением, а именно проведено моделирование ППД литейного алюминиевого сплава АК12М2, а также сравнение свойств поверхности до и после ППД и влияние угла деформации с учетом количества циклов ППД на качество поверхности. Результаты проведенных исследований позволили дать практические рекомендации по внедрению результатов работы на ОАО "Пневматика" (г. Симферополь), а именно показана обработка на примере детали корпус крана ПКР25 и получены герметичные разъемных соединения в деталях из алюминиевых сплавов с газо-усадочной пористостью. Проведено сравнение качества резьбовых соединений, получаемых по базовому и новому варианту обработки и оценка экономической эффективности. Это позволило снизить технологическую себестоимость и получить экономический эффект в размере 18207 грн., за счёт снижения трудоёмкости обработки, затрат на инструмент и технологические жидкости.
The thesis for the degree of candidate of technical sciences, specialty 05.02.08 - technology of mechanical engineering. National Technical University "Kharkiv Polytechnic Institute", Kharkov, 2016. The dissertation is devoted to the processing to ensure the tightness of threaded connections of details from aluminum alloys deformed gas shrinkage porosity tool. Analytical and experimental research method of machining of the threaded holes in applying deforming tools based modeling of the process of forming a trumpet groove in blind holes deforming tool. Theoretically grounded possibility of the surface layer of quality blind holes after PPD alloy AK12M2. The new design tools and practical advice on selecting treatment regimes that ensure maximum processing efficiency deaf threaded holes. The economic effect of the introduction of the main provisions of the production of 18,207.44 UA.
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Абдулкерімов, Ілімдар Діляверович. "Технологічне забезпечення якості різьбових з'єднань у глухих отворах деталей з алюмінієвих сплавів деформуючим інструментом". Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/20295.

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Анотація:
Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.02.08 – технологія машинобудування. Національний технічний університет "Харківський політехнічний інститут", Харків, 2016. Дисертація присвячена вирішенню проблеми технологічного забезпечення герметичності різьбових з'єднань деталей з алюмінієвих сплавів з газо-усадковою пористістю деформуючим інструментом. У роботі проведено аналіз існуючих систем обробки глухих отворів у деталях з газо-усадкових матеріалів. Проведено аналітичне та експериментальне дослідження методу механічної обробки різьбових отворів при застосуванні деформуючого інструменту з урахуванням моделювання процесу формоутворення трубних різьб у глухих отворах деформуючим інструментом. Розроблено конструктивні й технологічні параметри деформуючого інструменту для глухих отворів під трубну різьбу в деталях з алюмінієвих сплавів з газо-усадковою пористістю. Теоретично обґрунтовано можливість забезпечення якісного поверхневого шару глухих отворів після ППД сплаву АК12М2. Запропоновано нові конструкції інструменту та практичні рекомендації щодо вибору режимів обробки, що забезпечують високу ефективність обробки глухих різьбових отворів. Економічний ефект від упровадження основних положень роботи у виробництво становить 18207 грн.
The thesis for the degree of candidate of technical sciences, specialty 05.02.08 - technology of mechanical engineering. National Technical University "Kharkiv Polytechnic Institute", Kharkov, 2016. The dissertation is devoted to the processing to ensure the tightness of threaded connections of details from aluminum alloys deformed gas shrinkage porosity tool. Analytical and experimental research method of machining of the threaded holes in applying deforming tools based modeling of the process of forming a trumpet groove in blind holes deforming tool. Theoretically grounded possibility of the surface layer of quality blind holes after PPD alloy AK12M2. The new design tools and practical advice on selecting treatment regimes that ensure maximum processing efficiency deaf threaded holes. The economic effect of the introduction of the main provisions of the production of 18,207.44 UA.
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Книги з теми "Alloy blend"

1

Blind alley. New York: Bantam Books, 2005.

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2

Johansen, Iris. Blind alley. New York: Bantam Books, 2004.

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3

Johansen, Iris. Blind alley. New York: Random House Large Print, 2004.

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4

Blind alley. New York: Bantam Books, 2004.

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5

Johansen, Iris. Blind Alley. New York: Random House Publishing Group, 2004.

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6

Peacock, Justin. Blind man's alley. New York: Doubleday, 2010.

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7

Peacock, Justin. Blind man's alley. New York: Pocket Black Lizard, 2011.

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8

Blind man's alley. New York: Doubleday, 2010.

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9

Peacock, Justin. Blind man's alley. New York: Doubleday, 2010.

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10

Folkes, M. J., and P. S. Hope, eds. Polymer Blends and Alloys. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2162-0.

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Частини книг з теми "Alloy blend"

1

Hourston, D. J. "Alloys and Blends." In Polymer Science and Technology Series, 20–22. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-015-9231-4_5.

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2

Vesely, D. "Practical techniques for studying blend microstructure." In Polymer Blends and Alloys, 103–25. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2162-0_5.

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3

Kamal, Musa R., Leszek A. Utracki, and A. Mirzadeh. "Rheology of Polymer Alloys and Blends." In Polymer Blends Handbook, 725–873. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-6064-6_9.

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4

Scobbo, J. J., and Lloyd A. Goettler. "Applications of Polymer Alloys and Blends." In Polymer Blends Handbook, 951–76. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/0-306-48244-4_13.

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5

Hope, P. S., and M. J. Folkes. "Introduction." In Polymer Blends and Alloys, 1–6. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2162-0_1.

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6

Curry, J. E. "Practical aspects of processing of blends." In Polymer Blends and Alloys, 7–45. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2162-0_2.

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7

Bonner, J. G., and P. S. Hope. "Compatibilisation and reactive blending." In Polymer Blends and Alloys, 46–74. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2162-0_3.

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8

Lyngaae-Jørgensen, J. "Rheology of polymer blends." In Polymer Blends and Alloys, 75–102. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2162-0_4.

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9

Arridge, R. G. C. "Theoretical aspects of polymer blends and alloys." In Polymer Blends and Alloys, 126–62. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2162-0_6.

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10

Lee, W. H. "Toughened polymers." In Polymer Blends and Alloys, 163–94. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2162-0_7.

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Тези доповідей конференцій з теми "Alloy blend"

1

Kakadjian, Sarkis, Keith Korhonen, Marvin Solomon, Jarrett Kitchen, Amanuel Gebrekirstos, Jesse Risner, and Otman Algadi. "Effective Water Treatment in the Permian and Marcellus Shales to Mitigate Surface Equipment Failures." In SPE Annual Technical Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/210250-ms.

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Abstract Chemical and oxidative biocides are designed to sanitize water by reducing aerobic and anaerobic bacterial populations in the fresh, brackish and reclaimed source waters. These biocides are used extensively in high-rate fracture stimulations to reduce formation damage, chemical degradation, biogenic H2S and microbial induced corrosion (MIC). Oxidative biocides work by removing electrons from the cell wall of aerobic and anaerobic bacteria. The same electron transfer mechanism can be detrimental to surface equipment. This study presents the impact of several oxidative biocides on the corrosion rate and pitting of different frac iron alloys and how those biocides effect the mechanical integrity of elastomer seals. It also presents different remediation methods to mitigate their oxidative effects. The oxidative biocides tested were Chlorine, Chlorine Dioxide and a Peracidic Acid blend. The corrosion rate of the iron alloys coupons was measured by weight loss analysis. This method can measure the rate of corrosion in pounds per square foot at time and was used to compare the impact of different residual oxidizers on the corrosion rate of the ground iron. Structural changes to the elastomers were detected visually. The results of the study showed that the corrosion rate varied depending on the alloy/residual oxidative biocide combination. Usually, Peracidic Acid blend or Chlorine had the highest corrosion rates across all alloys tested; depending on the oxidative biocide/alloy combination, the corrosion rate could vary by a factor of 2X over the nine-week timeframe. Elastomer testing over 6 weeks showed variability in the types of structural changes depending on the concentration and oxidative biocide tested. The lab and field testing included onsite monitoring of the corrosion rate, oxidation reduction potential (ORP), oxygen in solution and determination of the Langelier Saturation Index (LSI). The methodology has been effective in predicting iron failures related to the composition of the water and/or presence of oxidizers. Chemical solutions implemented to mitigate the surface iron failures included use of intermittent blends of water-soluble quaternary amines and surfactants. Since these remediation attempts have started, the replacement cost of frac iron has decreased from over 550K US$ per month, per frac spread to none, over a 3-month period.
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2

Ez-Zaki, Hamza, Frederic Christien, Cédric Bosch, Laurent Briottet, Maxime Bertin, Olivier Levasseur, and Alain Leriverain. "Effect of Hydrogen Content in Natural Gas Blend on the Mechanical Properties of a L485-MB Low-Alloyed Steel." In ASME 2020 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/pvp2020-21228.

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Abstract The purpose of the present work is to study the effect of the hydrogen content in a H2-NG (Natural Gas) blend on the mechanical behavior of a C-Mn low alloy steel L485-MB (NF EN ISO 3183) under monotonic loading. Different testing conditions were explored for the blend: 2% H2-NG, 25% H2-NG, 100% H2 and 100% NG at a total pressure of 8.5 MPa using two slow strain rates: 10−4 s−1 and 10−6 s−1. Tests in the blend were compared to those under pure hydrogen at the same partial pressures. Furthermore, two surface roughnesses have been explored, one corresponding to a mirror polish, the other as lathed. The embrittlement has been assessed by necking measurements and fracture analysis for the whole testing conditions. The results show a drop of ductility with the increase of partial pressure of hydrogen in NG. Besides, no significant effect of hydrogen were observed on flow stress. In addition, the L485-MB pipeline steel presents a shear type fracture mode in high partial pressure of hydrogen, whereas a cup and cone type fracture were observed in air, NG and low partial pressure of hydrogen in NG (0.2 MPa H2).
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3

DellaCorte, C. "Nickel-Titanium Alloys for Oil-Lubricated Bearing and Mechanical Component Applications." In ASME/STLE 2009 International Joint Tribology Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/ijtc2009-15055.

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Nickel-titanium (Ni-Ti) alloys are normally associated with applications that exploit their shape memory characteristics. When properly formulated and processed, however, Ni-Ti is dimensionally stable and offers a unique blend of attributes suitable for tribological applications. This paper demonstrates that Ni-Ti alloys are promising candidate structural materials for oil-lubricated rolling and sliding contact applications such as bearings and gears. Ni-Ti alloys offer a broad combination of physical properties that make it unique among bearing materials. Ni-Ti alloys are hard, electrically conductive, highly corrosion resistant, readily machined prior to final heat treatment, non-galling and non-magnetic. No other bearing alloy, metallic or ceramic encompasses all of these attributes. Spiral orbit tribometer (SOT) tests were conducted using 60NiTi balls loaded between rotating 440C disks, lubricated with synthetic oil and tested in a vacuum. Excellent tribological performance (life and friction) was observed and lubricant degradation normally associated with titanium alloys was absent. It is anticipated that the Ni-Ti family of alloys may form the basis of an entirely new class of bearing and component materials.
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4

KovářÍk, Ondřej, Jaroslav Čech, Jan Cizek, Jakub Klečka, and Michal Hajíček. "Mechanical and Fatigue Properties of Tungsten Heavy Alloy Prepared by RF-Plasma." In ITSC2021, edited by F. Azarmi, X. Chen, J. Cizek, C. Cojocaru, B. Jodoin, H. Koivuluoto, Y. C. Lau, et al. ASM International, 2021. http://dx.doi.org/10.31399/asm.cp.itsc2021p0115.

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Abstract Tungsten heavy alloy (WHA) of W-Ni composition was deposited from a blend of standard thermal spray powders using radio frequency inductively coupled plasma torch (RF-ICP) in a protective atmosphere. The deposit (RF WHA) contained a fully developed WHA structure; i.e.; spherical W particles embedded in a Ni-rich matrix. The bending tensile strength Rm; bending yield strength Rp;0.2; and elastic modulus of the deposit were compared with two W-Ni-Co references fabricated by powder metallurgy (PM WHA) via sintered and quenched (PMSQ); and forged and annealed (PM-FA). While the RF deposit properties are comparable with the PM-SQ reference; the PMFA exhibited higher mechanical properties. The deposit showed very limited ductility A < 3%. The fatigue crack growth rate in the deposit measured in bending (R < -1) was comparable to the PM-SQ reference material in the near-threshold region whereas the forged PM-FA had significantly better fatigue performance. In the near-threshold fatigue regime; the crack growth took place in the Ni-rich matrix. In the Paris regime; the similar fracture mode was observed; with the exception of PM-SQ; where the tungsten particles fracture contributed significantly. The static failure was exclusively trans-particle in RF WHA; while both PM WHAs failed by a mix of ductile matrix failure and trans-particle cleavage fracture. The fracture toughness of the deposit was significantly lower than the references. These early results indicate that RF-plasma spray is a suitable and efficient manufacturing method for production of WHA materials; however with limited mechanical properties in some aspects.
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5

Kuppuswamy, Ramesh, Deon Bower, and Poloko March. "Effect of Ball Nose End Mill Geometry on High Speed Machining of Ti6Al4V." In ASME 2013 International Manufacturing Science and Engineering Conference collocated with the 41st North American Manufacturing Research Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/msec2013-1041.

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The application of Titanium alloys are increasingly seen at aerospace, marine, bio-medical and precision engineering due to its high strength to weight ratio and high temperature properties. However while machining the titanium alloys using solid carbide tools, even with jet infusion of coolant lower tool life was vividly seen. The high temperatures generated at the tool-work interface causes adhesion of work-material on the cutting edges and hence shorter tool life was reported. To reduce the high tool work interface temperature positive rake angle, higher primary relief and higher secondary relief were configured on the ball nose end-mill cutting edges. However after a initial working period the growth of flank wear facilitates higher cutting forces followed by work-material adhesion on the cutting edges. Therefore it is important to blend the: strength, sharpness, geometry and surface integrity on the cutting edges so that the ball nose end mill would demonstrate an extended tool-life. This paper illustrates the effect of ball nose end mill geometry on high speed machining of Ti6Al4V. Three different ball nose end mill geometries were configured and high speed machining experiments were conducted to study the influence of tool geometry on the metal cutting mechanism of Ti-6Al-4V alloy. The high speed machining results predominantly emphasize the significance of cutting edge features such as: K-Land, rake angle and cutting edge radius. The ball nose end-mills featured with a short negative rake angle of value −5° for 0.05–0.06 mm i.e., K-Land followed by positive rake angle of value 8° has produced lower cutting forces signatures for Ti-6Al-4V alloy.
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6

Denman, Bradley M., Jeffrey D. Munzar, and Jeffrey M. Bergthorson. "An Experimental and Numerical Study of the Laminar Flame Speed of Jet Fuel Surrogate Blends." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-69917.

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Kerosene-type fuels are the most common aviation fuel, and an understanding of their combustion properties is essential for achieving optimized gas turbine operation. Presently, however, there is lack of experimental flame speed data available by which to validate the chemical kinetic mechanisms necessary for effective computational studies. In this study, premixed jet fuel surrogate blends and commercial kerosene are studied using particle image velocimetry in a stagnation flame geometry. Numerical simulations of each experiment are obtained using the CHEMKIN-PRO software package and the JetSurF 2.0 mechanism. The neat hydrocarbon surrogates investigated include n-decane, methylcyclohexane, and toluene, which represent the alkane, cycloalkane, and aromatic components of conventional aviation fuel, respectively. Two blends are studied in this paper. The first is a binary blend formulated to reproduce the laminar flame speed of aviation fuel using a mixing rule based on the laminar flame speed and adiabatic flame temperature of the hydrocarbon components, weighted by their respective mixture mole fractions. The second blend is a tertiary blend formulated to emulate the hydrogen to carbon ratio of the kerosene studied. All of the considered fuels and blends are studied at three equivalence ratios, corresponding to lean, stoichiometric, and rich conditions, and at several stretch rates. The centreline axial velocity profiles from numerical simulations are directly compared to the measured velocity profiles to validate the mechanism at each condition. The difference between the experimental and simulated reference flame speed is used to infer the true unstretched laminar flame speed of the mixture. These results allow the effectiveness of the different blending methodologies to be assessed.
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7

Day, W. David, Stephen W. Fiebiger, and Hitesh N. Patel. "Parametric Evaluation of Compressor Blade Blending." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68641.

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This paper presents a methodology for rapidly analyzing the effect of blending damaged compressor blades on structural integrity. Heavy duty gas turbine compressor blades are subjected to damage from numerous sources. Compressor blades are blended in the field to allow continued operation with minimal risk of failure. By constructing analysis models parametrically, blend limits may be rapidly and reliably established for an entire compressor. Erosion from washing or fogging, foreign object impacts, icing, tip rubs, and clash can damage both stator vanes and blades. Replacement of blades and stator vanes is very costly. The blades on some engines cannot be removed without de-stacking the rotor. The high cost of replacement provides an incentive to determine blend limits that do not compromise mechanical integrity. Field service support of compressor hardware includes the evaluation of compressor damage and the determination of whether such damage can be blended out in situ. Compressors on F-class engines have more than 15 stages, so at least 30 different airfoils must be analyzed when stator vanes are included. One must consider damage in the tips as well as leading and trailing edges at numerous radii. The variation in sizes, locations, and combinations of blends coupled with the number of airfoils results in a intense analytical task. Field service must also support multiple design configurations that include original engine manufacturer (OEM) blades as well as more robust aftermarket designs. By setting up parametric analysis models of each blade, PSM has been able to provide its field service support group with accurate blend limits and has created a tool with which nonstandard blends may be evaluated in nearly real-time. This paper presents a methodology which has been applied to an entire compressor. A pre-stressed large-displacement modal analysis was performed which includes contact effects and considers a wide range of operating speeds using the linear perturbation technique. Combinations of parametrically defined blends are analyzed automatically. The effects of the blends on the modal frequencies were evaluated against in-house criterion. Plots of vibratory stress capability were produced to highlight which airfoils and which portions of airfoils are vulnerable in case of damage. The parametric nature of the analysis allows the user to easily change the position size and shape of the blends. With this methodology PSM is able to rapidly evaluate blends of stator vanes and blades for whole compressors and provide reliable and timely guidance to our field service representatives.
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8

Hodder, Kevin, Adrian Gerlich, Julio Villafuerte, and André McDonald. "Fabrication of Aluminum-Alumina Metal Matrix Composite Coatings Via Cold Gas Dynamic Spraying at Low Pressure Followed by Friction-Stir Processing." In ITSC 2012, edited by R. S. Lima, A. Agarwal, M. M. Hyland, Y. C. Lau, C. J. Li, A. McDonald, and F. L. Toma. ASM International, 2012. http://dx.doi.org/10.31399/asm.cp.itsc2012p0231.

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Abstract Cold gas dynamic spraying (“cold spraying”) at low pressure (150 psig) was used to fabricate Al-Al2O3 metal-matrix composite (MMC) coatings onto 6061 Al alloy. The powder contained -45 µm Al stock powder admixed with -10 Al2O3 in fractions ranging from 0-90 wt%. Scanning electron microscopy (SEM), Vickers microhardness testing, and image analysis were conducted on the as-sprayed coatings. The coatings were then friction-stir processed (FSP) using a milling machine and a 12 mm diameter cylindrical tool. Microhardness testing, SEM, and image analysis were then repeated to study the effect that FSP had on the MMC coating hardness. Hardness increased with increasing fraction of Al2O3 in the feedstock powder, resulting in a maximum as-sprayed coating hardness of 85 HV when 90 wt% Al2O3 is used. After FSP, the hardness of the MMC fabricated from a 90 wt% Al2O3 powder blend increased to a maximum of 140 HV. SEM micrographs showed that the as-sprayed MMC coatings contained Al2O3 particles that had been trapped between the larger Al particles. FSP succeeded in redistributing the Al2O3 particles, decreasing the mean free interparticle distance and increasing the probability of load sharing between the reinforcing particles. It was suggested that this redistribution may be the primary reason for hardness improvement in the MMC coatings.
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Burgess, Austin Tyler, Colin Hosli, and Kevin Whittaker. "A Return to Production: Subsea Packer Leak Remediation with Pressure-Activated Sealant." In SPE 2022 Symposium Compilation. SPE, 2022. http://dx.doi.org/10.2118/210607-ms.

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Abstract The subject well was a subsea producer in the Gulf of Mexico exhibiting pressure loss from its production annulus. An approximately 40 mL/minute (15 psi/hour) leak was identified via logging techniques during a riser-based intervention campaign. This leak was then determined to be past the production packer element set. The well was isolated and the data was reviewed to identify forward options. Though considered, a riser-based intervention was eliminated as an option to restore integrity and return it to production due to technical, scheduling, and economic considerations. Based on these constraints, the operator opted for a sealant remediation approach. The operator considered multiple sealant products, ultimately working with an engineered sealing solution provider to analyze all available data to evaluate leak characteristics while still progressing other contingencies. From these parameters, a subsea sealant blend tailored to the application was prepared and successfully tested to confirm its suitability for this application. A remediation procedure was then developed to fill subsea bladders with sealant, which were then spotted on the sea floor to inject the sealant into the annulus through a Well Stimulation Tool, Bass Adapter, and Tree Running Tool utilizing an engineered lubricate and bleed volumetric injection technique. Because the annulus was fluid packed, a series of four lube and bleed cycles were performed to compress annular fluid with sealant and bleed back completion fluid to a host platform via the flowline. The selected blend of sealant was approximately 240 kg/m3 heavier than the packer fluid to facilitate its fall and allow for fluid swap in between cycles. This ensured only annular fluid was being bled off, rather than the injected sealant. After the final cycle, annular pressure was maintained at the maximum threshold for a cure period before testing the repair. Within one day following the final lube and bleed cycle, the sealant had successfully accumulated on top of the packer as designed. The applied pressure maintained during the cure period had activated the sealant and the annular pressure remained steady over the operator's monitoring period. Given these positive indications, the operator tested the repair with no pressure loss over the test interval. All internal and regulatory requirements had been satisfied, allowing the well to be returned to production. This sealant was designed to polymerize at the packer elements, which provided the needed pressure differential. This differential triggered a chemical reaction, thereby creating a flexible, solid seal only at the leak site. This newly formed and tested seal was designed to furnish a seal for the forecasted production profile and excess sealant would remain liquid above the packer. In the event that the leak was to return, the operator would have the capability to perform an annular pressure manipulation sequence from the host platform to activate residual sealant, thus re-establishing integrity.
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Thien, B., K. Annamalai, and J. Sweeten. "Co-Firing Feedlot and Litter Biomass: Coal Blends in a Laboratory Scale Boiler Burner." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33999.

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The co-firing of animal biomass fuels with coal has the potential to solve both biomass disposal problems, and reduce net CO2 emissions. The high flame temperatures produced by coal will allow the low heating value, high ash biomass to be completely burnt. Unfortunately, the animal biomass fuels are high in nitrogen and sulfur, which could lead to greater air pollution levels in the form of NO and SO2. To determine the effect of switching to 90:10 Coal:biomass blend on combustion efficiency and emissions, the blends were fired in a 30 kW (100,000 BTU/hr) laboratory scale boiler burner. The results are presented along with the their relation to the fuel properties.
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Звіти організацій з теми "Alloy blend"

1

Szołtysek, Mikołaj. Spatial construction of European family and household systems: a promising path or a blind alley? An Eastern European perspective. Rostock: Max Planck Institute for Demographic Research, December 2011. http://dx.doi.org/10.4054/mpidr-wp-2011-021.

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