Influence of Stacking Fault Energy on the Mechanical Properties and Work Hardening Behavior of Ultra-Fine (UF) Grained Cu and Cu Alloys

Ultrafine-grained (UFG) pure Cu and Cu–Zn alloys samples were prepared using cold-rolling under liquid nitrogen temperature to investigate the influence of stacking fault energy (SFE) on the mechanical properties and microstructure. The tensile tests were performed at room temperature with the strain rate of 10-4/s, and the strain hardening rate (SHR) was computed from the engineering stress-strain curves. A decrease in SFE simultaneously improves strength and ductility. The average grain sizes, microstrain, dislocation density and twin density were examined using X-ray diffraction (XRD). X-ray diffraction measurements indicate that grain size decreased and microstrain, dislocation and twin densities increased with decreasing SFE.

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Effect of Nitrogen Addition on Mechanical Property of Ti-Cr-Sn Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.654-656.2126 ◽

2010 ◽

Vol 654-656 ◽

pp. 2126-2129 ◽

Cited By ~ 4

Author(s):

Yuichi Nakahira ◽

Tomonari Inamura ◽

Hiroyasu Kanetaka ◽

Shuichi Miyazaki ◽

Hideki Hosoda

Keyword(s):

Mechanical Properties ◽

Room Temperature ◽

Tensile Tests ◽

Nitrogen Addition ◽

N Addition ◽

X Ray Diffraction ◽

Solution Hardening ◽

X Ray ◽

Bcc Phase ◽

Cold Workability

Effect of nitrogen (N) addition on mechanical properties of Ti-Cr-Sn alloy was investigated in this study. Ti-7mol%Cr-3mol%Sn was selected and less than 0.5wt% of N were systematically added. The alloys were characterized by optical microscopy, X-ray diffraction analysis and tensile tests at room temperature. The apparent phase was β (bcc) phase, whereas the presence of precipitates was confirmed in 0.5wt%N-added alloy only which did not exhibit sufficient cold workability. The grain size was not largely affected by N addition being less than 0.5wt%. Tensile tests revealed that less than 0.5wt%N addition improves the strength which is due to the solution hardening by interstitial N atoms.

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Effects of Extrusion on the Mechanical Properties and Damping Capacity of Mg-1.8Cu-0.5Mn Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.546-549.257 ◽

2007 ◽

Vol 546-549 ◽

pp. 257-260 ◽

Cited By ~ 4

Author(s):

Zhen Yan Zhang ◽

Li Ming Peng ◽

Xiao Qin Zeng ◽

Lin Du ◽

Lan Ma ◽

...

Keyword(s):

Mechanical Properties ◽

Tensile Properties ◽

Room Temperature ◽

Tensile Tests ◽

Optical Microscope ◽

Damping Capacity ◽

X Ray Diffraction ◽

Dynamic Mechanical Analyzer ◽

X Ray ◽

Solute Atoms

Effects of extrusion on mechanical properties and damping capacity of Mg-1.8wt.%Cu -0.5wt.%Mn (MCM1805) alloy have been investigated. Tensile tests and dynamic mechanical analyzer were respectively used to measure tensile properties and damping capacity at room temperature of as-cast and as-extruded MCM1805 alloy. The microstructure was studied using optical microscope, X-ray diffraction and scanning electron microscope with an energy dispersive X-ray spectrometer. Granato-Lücke model was used to explain the influences of extrusion on damping capacity of MCM1805 alloy. The results showed that extrusion dramatically decreases the grain size but has little influence on phase composition and solute atoms concentration of MCM1805 alloy, and the grain refinement was the dominant reason for the obvious increase of tensile properties and decrease of internal friction of MCM1805 alloy.

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Structure and properties of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)/poly(L-lactic acid) quasi core/sheath melt-electrospun microfibers

Textile Research Journal ◽

10.1177/0040517518779997 ◽

2018 ◽

Vol 89 (9) ◽

pp. 1770-1781 ◽

Cited By ~ 1

Author(s):

Huaizhong Xu ◽

Benedict Bauer ◽

Masaki Yamamoto ◽

Hideki Yamane

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Lactic Acid ◽

Tensile Tests ◽

Processing Parameters ◽

Structure And Properties ◽

X Ray Diffraction ◽

Scanning Calorimetry ◽

X Ray ◽

Diffraction Patterns

A facile route was proposed to fabricate core–sheath microfibers, and the relationships among processing parameters, crystalline structures and the mechanical properties were investigated. The compression molded poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH)/poly(L-lactic acid) (PLLA) strip enhanced the spinnability of PHBH and the mechanical properties of PLLA as well. The core–sheath ratio of the fibers was determined by the prefab strip, while the PLLA sheath component did not completely cover the PHBH core component due to the weak interfacial tension between the melts of PHBH and PLLA. A rotational target was applied to collect aligned fibers, which were further drawn in a water bath. The tensile strength and the modulus of as-spun and drawn fibers increased with increasing the take-up velocities. When the take-up velocity was above 500 m/min, the jet became unstable and started to break up at the tip of the Taylor cone, decreasing the mechanical properties of the fibers. The drawing process facilitated the crystallization of PLLA and PHBH, and the tensile strength and the modulus increased linearly with the increasing the draw ratio. The crystal information displayed from wide-angle X-ray diffraction patterns and differential scanning calorimetry heating curves supported the results of the tensile tests.

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Microstructures and Mechanical Properties of Ti-43Al-5V-4Nb-Y Alloy Consolidated by Spark Plasma Sintering

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.704.183 ◽

2016 ◽

Vol 704 ◽

pp. 183-189

Author(s):

Yong Jun Su ◽

Yi Feng Zheng ◽

De Liang Zhang ◽

Fan Tao Kong

Keyword(s):

Mechanical Properties ◽

Spark Plasma Sintering ◽

Tial Alloy ◽

Tensile Tests ◽

X Ray Diffraction ◽

X Ray ◽

Plasma Sintering ◽

Short Period ◽

Spark Plasma ◽

Fully Lamellar

TiAl alloy with a composition of Ti-43Al-5V-4Nb-Y (at.%) was prepared by spark plasma sintering (SPS). The TiAl powders were sintered between 650°C and 1300°C for 5 min under different loads. With the increasing of the temperature, the diffusion of the elements can be observed. Full compaction is achieved in a short period of time and the overall processing duration does not exceed 30 min. A fully lamellar structure was seen in the TiAl alloy after heat treatment. The microstructures of the samples were determined by X-ray diffraction and scanning electron microscopy. Their mechanical properties were evaluated by tensile tests performed at room temperature

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The Influence of Stacking Fault Energy on the Cold-Rolling Cu and Cu-Al Alloy: Structure and Mechanics Properties

Materials Science Forum ◽

10.4028/www.scientific.net/msf.683.95 ◽

2011 ◽

Vol 683 ◽

pp. 95-102 ◽

Cited By ~ 1

Author(s):

Hao Yang ◽

Peng Yang ◽

Jing Mei Tao ◽

Cai Ju Li ◽

Xin Kun Zhu

Keyword(s):

Cold Rolling ◽

Deformation Twin ◽

High Strength ◽

Liquid Nitrogen Temperature ◽

Al Alloy ◽

Face Centered Cubic ◽

X Ray Diffraction ◽

X Ray ◽

Face Centered ◽

Strength And Ductility

Sacking fault energy (SFE) is the key role in solving this problem of getting high strength and expected ductility simultaneously. This work adds Al as the procedure of decreasing SFE in Cu face-centered cubic. It is an economic and effective method to counterpart Cold-rolling at liquid nitrogen temperature to get high density deformation twin and ultrafine-grains size. After undergoing tensile and X-ray diffraction tests, Cu-4.5 wt.% Al plays the best performance on both strength and ductility. Thus there exist the optimal SFE of Cu-Al alloys which get both high strength and expected ductility simultaneously.

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Influence of Temperature of Accumulative Roll Bonding on the Microstructure and Mechanical Properties of AA5251 Aluminum Alloy

Archives of Metallurgy and Materials ◽

10.2478/amm-2014-0020 ◽

2014 ◽

Vol 59 (1) ◽

pp. 127-131 ◽

Cited By ~ 9

Author(s):

J. Bogucka

Keyword(s):

Mechanical Properties ◽

Ambient Temperature ◽

Accumulative Roll Bonding ◽

Bonding Temperature ◽

Tensile Tests ◽

Structure Evolution ◽

X Ray Diffraction ◽

Roll Bonding ◽

X Ray ◽

Microstructure And Mechanical Properties

Abstract The influence of bonding temperature on microstructure and mechanical properties of AA5251 alloy sheets have been analyzed in the paper. The alloy was deformed with the method of accumulative roll bonding (ARB) in various temperature conditions i.e. at ambient temperature up to 5th cycle (ε = 4.0) and using pre-heating of sheet packs at 200°C and 300°C up to 10 cycles (ε = 8.0). The deformed material was subjected to structural observations using TEM, measurements of crystallographic texture with the technique of X-ray diffraction and tensile tests. It was established that the temperature of roll-bonding had a significant effect on the structure evolution and the observed changes of mechanical properties. High refinement of microstructure and optimum mechanical properties were obtained for the material processed at lower temperatures, i.e. at ambient temperature and pre-heating at 200°C. Recovery structure processes occurring during deformation were observed in the alloy bonded with pre-heating at 300°C and therefore mechanical properties were lower than for the alloy bonded at lower temperatures.

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Simultaneous Improvement of Ductility and Strength by Minute Doping in Ultrafine Grained Au Wires-Experiment and First Principle Study

MRS Proceedings ◽

10.1557/proc-1086-u09-03 ◽

2008 ◽

Vol 1086 ◽

Author(s):

Yeong Huey Effie Chew ◽

Chee Cheong Wong ◽

Cristiano Ferraris ◽

Hui Hui Kim

Keyword(s):

High Strength ◽

Stacking Fault ◽

Stacking Fault Energy ◽

First Principle ◽

Fine Grained ◽

Preferential Segregation ◽

Ultrafine Grained ◽

Calcium Doping ◽

Gold Wires ◽

Strength And Ductility

AbstractAchieving both high strength and ductility is a common goal in the design of fine-grained materials. Here we report that with only ppm level of calcium doping, ductility and strength in ultrafine-grained gold wires can be concurrently improved by 108% and 65% respectively. Preferential segregation of calcium to stacking faults and grain boundaries in gold has reduced stacking fault energy of the system effectively, as shown by TEM and first principle simulation study. Through the modification of stacking fault energy, one can simultaneously increases the strength and ductility of a system.

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An x-ray diffraction study of the effect of stacking fault energy on the wear behavior of Cu-Al alloys

Wear ◽

10.1016/0043-1648(83)90196-5 ◽

1983 ◽

Vol 92 (2) ◽

pp. 213-229 ◽

Cited By ~ 28

Author(s):

J.J. Wert ◽

S.A. Singerman ◽

S.G. Caldwell ◽

D.K. Chaudhuri

Keyword(s):

Diffraction Study ◽

Wear Behavior ◽

Al Alloys ◽

Stacking Fault ◽

Stacking Fault Energy ◽

X Ray Diffraction ◽

X Ray

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Research on the Microstructure and Mechanical Properties of Spray-Deposited 8009 Heat Resistant Aluminum Alloy

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.543-547.3733 ◽

2014 ◽

Vol 543-547 ◽

pp. 3733-3736

Author(s):

Rong Hua Zhang ◽

Biao Wu ◽

Xiao Ping Zheng

Keyword(s):

Mechanical Properties ◽

Aluminum Alloy ◽

Tensile Tests ◽

Test Results ◽

Secondary Phases ◽

X Ray Diffraction ◽

X Ray ◽

Heat Resistant ◽

Microstructure And Mechanical Properties ◽

Transmission Electron

In this study, 8009 heat resistant aluminum alloy was synthesized by the spray atomization and deposition technique. The microstructure and mechanical properties of the alloy were studied using transmission electron microscopy, X-ray diffraction, and tensile tests. The secondary phases in the microstructure of the spray-deposited alloy were examined. The tensile test results indicate that the spray-deposited 8009 alloy both at room and elevated temperature displays superior tensile strength due to the presence of the thermally stable Al12(Fe,V)3Si particles.

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Synthesis and Characterization of TiO2Nanoparticles with Polycarbonate and Investigation of its Mechanical Properties

International Journal of Nanoscience ◽

10.1142/s0219581x17500120 ◽

2017 ◽

Vol 16 (05n06) ◽

pp. 1750012 ◽

Cited By ~ 5

Author(s):

Farhad Jahantigh ◽

Mehdi Nazirzadeh

Keyword(s):

Mechanical Properties ◽

Weight Fraction ◽

Xrd Analysis ◽

Tensile Tests ◽

Nanocomposite Films ◽

Micro Hardness ◽

X Ray Diffraction ◽

X Ray ◽

Thermal Stability Of

In this project, nanocomposite films were prepared with different Titanium dioxide (TiO2) percentages. Properties of polycarbonate (PC) and PC–TiO2nanocomposite films were studied by X-ray diffraction (XRD) analysis and Fourier transform infrared (FTIR) spectroscopy. The structure of samples was studied by XRD. The mechanical properties of PC–TiO2nanocomposite films were investigated by conducting tensile tests and hardness measurements. Thermal stability of the nanocomposites was studied by thermogravimetric analysis (TGA) method. The elastic modulus of the composite increased with increasing weight fraction of nanoparticles. The microhardness value increases with increasing TiO2nanoparticles. The results of tensile testing were in agreement with those of micro-hardness measurements. In addition, TGA curves showed that nanocomposite films have higher resistance to thermal degradation compared to polycarbonate. There are many reports related to the modification of polycarbonate films, but still a systematic study of them is required.

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