scholarly journals The Effect of Short Duration Electric Current on the Quasi-Static Tensile Behavior of Magnesium AZ31 Alloy

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Trung Thien Nguyen ◽  
Thai Vinh Nguyen ◽  
Sung-Tae Hong ◽  
Moon-Jo Kim ◽  
Heung Nam Han ◽  
...  
Keyword(s):  
Flow Stress ◽  
Strain Hardening ◽  
Electric Current ◽  
Electric Energy ◽  
Single Pulse ◽  
Az31 Alloy ◽  
Tensile Behavior ◽  
Magnesium Az31 ◽  
Static Tensile ◽  
Electric Energy Density

The effect of a single pulse of electric current with short duration on the quasi-static tensile behavior of a magnesium AZ31 alloy is experimentally investigated. A single pulse of electric current with duration less than 1 second is applied to the specimen, while the specimen is being deformed in the plastic region under quasi-static tensile loads. After a nearly instant decrease of flow stress at the pulse of electric current, the flow stress shows strain hardening until the failure of the specimen. The experimental result shows that the strain-hardening parameters (the strength coefficient and the strain-hardening exponent) of the hardening curve after the electric current strongly depend on the applied electric energy density (electric energy per unit volume). Empirical expressions are suggested to describe the hardening behavior after the pulse as a function of the electric energy density and are compared with the empirical expressions suggested for advanced high-strength steels.

The tensile electroplasticity of magnesium AZ31 alloy with a single pulse of electric current

2013 ◽  
Author(s):  
Nguyen Thai Vinh ◽  
Min-Sung Kim ◽  
Hyeong-Ho Yu ◽  
Sung-Tae Hong ◽  
Moon-Jo Kim ◽  
...  
Keyword(s):  
Electric Current ◽  
Single Pulse ◽  
Az31 Alloy ◽  
Magnesium Az31

Micro-Tensile Behavior at a High Temperature in an AZ31 Magnesium Alloy Processed by ECAP

2014 ◽  
Vol 783-786 ◽  
pp. 2726-2731 ◽  
Author(s):  
Jie Xu ◽  
Bin Guo ◽  
De Bin Shan ◽  
Terence G. Langdon
Keyword(s):  
Grain Size ◽  
High Temperature ◽  
Magnesium Alloy ◽  
Tensile Tests ◽  
Az31 Alloy ◽  
Tensile Behavior ◽  
Micro Forming ◽  
Ecap Processing ◽  
Forming Technology ◽  
Magnesium Az31

A magnesium AZ31 alloy was processed by ECAP at a temperature of 473 K using a die with a channel of 110o. The results show that the grain size was reduced from 5.4 μm to ~1.0 μm. Micro-tensile tests of the AZ31 alloy were conducted using as-received and ECAP-processed AZ31 alloy at a temperature of 473 K. The ductility of the AZ31 alloy can be improved significantly after ECAP processing at high temperature, which demonstrates a potential application in micro-forming technology for the UFG AZ31 alloy.

scholarly journals Strain Hardening in an AZ31 Alloy Submitted to Rotary Swaging

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 157
Author(s):  
Zuzanka Trojanová ◽  
Zdeněk Drozd ◽  
Kristýna Halmešová ◽  
Ján Džugan ◽  
Tomáš Škraban ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Strain Hardening ◽  
Work Hardening ◽  
Room Temperature ◽  
Az31 Alloy ◽  
First Order ◽  
Softening Mechanism ◽  
Rotary Swaging ◽  
Magnesium Az31 ◽  
Tension And Compression

An extruded magnesium AZ31 magnesium alloy was processed by rotary swaging (RSW) and then deformed by tension and compression at room temperature. The work-hardening behaviour of 1–5 times swaged samples was analysed using Kocks-Mecking plots. Accumulation of dislocations on dislocation obstacles and twin boundaries is the deciding factor for the strain hardening. Profuse twinning in compression seems to be the reason for the higher hardening observed during compression. The main softening mechanism is apparently the cross-slip between the pyramidal planes of the second and first order. A massive twinning observed at the deformation beginning influences the Hall-Petch parameters.

Hardness homogeneity and micro-tensile behavior in a magnesium AZ31 alloy processed by equal-channel angular pressing

2013 ◽  
Vol 586 ◽  
pp. 108-114 ◽  
Author(s):  
Jie Xu ◽  
Mahmood Shirooyeh ◽  
Jittraporn Wongsa-Ngam ◽  
Debin Shan ◽  
Bin Guo ◽  
...  
Keyword(s):  
Equal Channel Angular Pressing ◽  
Az31 Alloy ◽  
Tensile Behavior ◽  
Angular Pressing ◽  
Magnesium Az31

Generation of giant electric energy density by adiabatically compressed PIN-PMN-PT ferroelectric single crystals

2021 ◽  
Vol 118 (12) ◽  
pp. 122902
Author(s):  
Sergey I. Shkuratov ◽  
Jason Baird ◽  
Vladimir G. Antipov ◽  
Jay B. Chase
Keyword(s):  
Energy Density ◽  
Single Crystals ◽  
Electric Energy ◽  
Electric Energy Density

Study on Dynamic Mechanical Response of TC21 Alloy

2011 ◽  
Vol 88-89 ◽  
pp. 674-678
Author(s):  
Shuang Zan Zhao ◽  
Xing Wang Cheng ◽  
Fu Chi Wang
Keyword(s):  
Flow Stress ◽  
High Strain Rate ◽  
Strain Rate ◽  
Strain Hardening ◽  
High Strain ◽  
Dynamic Flow ◽  
Dynamic Mechanical ◽  
Hardening Effect ◽  
High Strain Rate Deformation ◽  
Binary Morphology

Some results of an experimental study on high strain rate deformation of TC21 alloy are discussed in this paper. Cylindrical specimens of the TC21 alloys both in binary morphology and solution and aging morphology were subjected to high strain rate deformation by direct impact using a Split Hopkinson Pressure Bar. The deformation process is dominated by both thermal softening effect and strain hardening effect under high strain rate loading. Thus the flow stress doesn’t increase with strain rate at the strain hardening stage, while the increase is obvious under qusi-static compression. Under high strain rate, the dynamic flow stress is higher than that under quasi-static and dynamic flow stress increase with the increase of the strain rate, which indicates the strain rate hardening effect is great in TC21 alloy. The microstructure affects the dynamic mechanical properties of TC21 titanium alloy obviously. Under high strain rate, the solution and aging morphology has higher dynamic flow stress while the binary morphology has better plasticity and less prone to be instability under high strain rate condition. Shear bands were found both in the solution and aging morphology and the binary morphology.

Characterization of mechanical property of magnesium AZ31 alloy sheets for warm temperature forming

2015 ◽  
Vol 93 ◽  
pp. 204-217 ◽  
Author(s):  
Youngwoo Koh ◽  
Daeyong Kim ◽  
Dong-Yoon Seok ◽  
Jeonghwan Bak ◽  
Sang-Woo Kim ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Az31 Alloy ◽  
Warm Temperature ◽  
Magnesium Az31
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