Strain hardening and microstructure evolution during uniaxial compression of ultrafine grained zirconium at temperatures of 4.2–300 K

2011 ◽  
Vol 37 (7) ◽  
pp. 609-617 ◽  
Author(s):  
A. V. Podolskiy ◽  
S. N. Smirnov ◽  
E. D. Tabachnikova ◽  
V. Z. Bengus ◽  
A. N. Velikodny ◽  
...  
Keyword(s):  
Strain Hardening ◽  
Uniaxial Compression ◽  
Microstructure Evolution ◽  
Ultrafine Grained

Microstructure Evolution and Properties of Ti-6Al-4V Alloy Doped with Fe and Mo during Deformation at 800°C

2018 ◽  
Vol 385 ◽  
pp. 144-149 ◽  
Author(s):  
Denis Klimenko ◽  
Maxim Ozerov ◽  
Santharam Suresh ◽  
Nikita Stepanov ◽  
Mikhail A. Tikhonovsky ◽  
...  
Keyword(s):  
Steady State ◽  
Mechanical Behavior ◽  
Titanium Alloys ◽  
Strain Hardening ◽  
Uniaxial Compression ◽  
Microstructure Evolution ◽  
Steady State Flow ◽  
Globular Microstructure ◽  
Flow Response ◽  
Alpha Beta

Microstructure evolution and mechanical behavior of alpha/beta Ti-6Al-4V and Ti-6Al-4V-0.75Mo-0.5Fe titanium alloys during uniaxial compression to a height strain of 70% was studied. The plastic-flow response for both alloys is characterized by successive stages of strain hardening, flow softening, and steady-state flow. During compression the lamellae spheroidized to produce a globular microstructure with higher rate of globularization in Ti-6Al-4V-0.75Mo-0.5Fe. The globularization kinetics in Ti-6Al-4V-0.75Mo-0.5Fe was also found to be much faster than that in Ti-6Al-4V. This difference can be partially associated with different interphase energy due to doping of β-stabilizing elements.

Investigations on Microstructure Evolution and Deformation Behavior of Aged and Ultrafine Grained Al-Zn-Mg Alloy Subjected to Severe Plastic Deformation

2010 ◽  
Vol 667-669 ◽  
pp. 253-258
Author(s):  
Wei Ping Hu ◽  
Si Yuan Zhang ◽  
Xiao Yu He ◽  
Zhen Yang Liu ◽  
Rolf Berghammer ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Plastic Deformation ◽  
Grain Size ◽  
Severe Plastic Deformation ◽  
Microstructure Evolution ◽  
Deformation Behavior ◽  
Deformation Mechanisms ◽  
Mg Alloy ◽  
Ultrafine Grained

An aged Al-5Zn-1.6Mg alloy with fine η' precipitates was grain refined to ~100 nm grain size by severe plastic deformation (SPD). Microstructure evolution during SPD and mechanical behaviour after SPD of the alloy were characterized by electron microscopy and tensile, compression as well as nanoindentation tests. The influence of η' precipitates on microstructure and mechanical properties of ultrafine grained Al-Zn-Mg alloy is discussed with respect to their effect on dislocation configurations and deformation mechanisms during processing of the alloy.

Strain Hardening During Uniaxial Compression of Polymer Glasses

2014 ◽  
Vol 3 (8) ◽  
pp. 784-787 ◽  
Author(s):  
Panpan Lin ◽  
Shiwang Cheng ◽  
Shi-Qing Wang
Keyword(s):  
Strain Hardening ◽  
Uniaxial Compression ◽  
Polymer Glasses

scholarly journals Microstructure and Mechanical Properties of Ultrafine-Grained Copper by Accumulative Roll Bonding and Subsequent Annealing

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5171
Author(s):  
Xueran Liu ◽  
Limin Zhuang ◽  
Yonghao Zhao
Keyword(s):  
Tensile Strength ◽  
Strain Hardening ◽  
Accumulative Roll Bonding ◽  
Shear Zones ◽  
Subsequent Annealing ◽  
Scale Production ◽  
Copper Sheet ◽  
Roll Bonding ◽  
Ultrafine Grained ◽  
Cumulative Strain

Recently, the accumulative roll bonding (ARB) technique has made significant progress in the production of various ultrafine-grained (UFG) metals and alloys. In this work, a UFG copper sheet was produced by ARB and subsequent annealing at 300 °C for 60 min to optimize strength and ductility. It was found that homogeneous lamellar UFG materials with a thickness of 200–300 nm were formed after six ARB passes. The microhardness and tensile strength of as-ARBed Cu increased, while the ductility and strain hardening decreased with the cumulative deformation strain. The as-ARBed specimens fractured in a macroscopically brittle and microscopically ductile way. After annealing, discontinuous recrystallization occurred in the neighboring interface with high strain energy, which was prior to that in the matrix. The recrystallization rate was enhanced by increasing the cumulative strain. UFG Cu ARBed for six passes after annealing manifested a completely recrystallized microstructure with grain sizes approximately ranging from 5 to 10 μm. Annealing treatment reduced the microhardness and tensile strength but improved the ductility and strain hardening of UFG Cu. As-annealed UFG-Cu fractured in a ductile mode with dominant dimples and shear zones. Our work advances the industrial-scale production of UFG Cu by exploring a simple and low-cost fabrication technique.

Microstructure and Corrosion Behaviour of Ultrafine-Grained Copper

2006 ◽  
Vol 503-504 ◽  
pp. 883-888 ◽  
Author(s):  
Branislav Hadzima ◽  
Miloš Janeček ◽  
Ralph Jörg Hellmig ◽  
Yulia Kutnyakova ◽  
Yuri Estrin
Keyword(s):  
Microstructure Evolution ◽  
Current Density ◽  
Corrosion Behaviour ◽  
Corrosion Damage ◽  
Corrosion Current ◽  
Good News ◽  
Coarse Grained ◽  
Anodic Current Density ◽  
Angular Pressing ◽  
Ultrafine Grained

Microstructure evolution and corrosion behaviour of ultrafine-grained copper processed by equal channel angular pressing (route Bc) were studied. The results of TEM investigation of the microstructure evolution are presented along with the measurements of the corrosion potential, the corrosion current density and the anodic current density for two aggressive media, viz. 3% NaCl and 1M H2SO4. An important finding and a good news is that the corrosion behaviour of ECAP copper is not inferior to and does not qualitatively differ from that of the coarse grained material. Moreover, it was shown by SEM investigation that the corrosion damage is more homogeneous in ultrafine grained ECAP processed copper than in its coarse grained counterpart.

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