Low temperature super ductility and threshold stress of an ultrafine-grained Al-Zn-Mg-Zr alloy processed by equal-channel angular pressing

被引：3
|
作者：
Boldizsar, Balint [1 ]
Jenei, Peter [1 ]
Ahmed, Anwar Q. [1 ]
Murashkin, Maxim Yu [2 ,3 ]
Valiev, Ruslan Z. [2 ,3 ]
Chinh, Nguyen Q. [1 ]
机构：
[1] Eotvos Lorand Univ, Dept Mat Phys, Pazmany Peter Setany 1-A, H-1117 Budapest, Hungary
[2] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, 12 K Marx St, Ufa 450008, Russia
[3] St Petersburg State Univ, Lab Mech Bulk Nanomat, 28 Univ Skypr, St Petersburg 198504, Russia
来源：
JOURNAL OF MATERIALS SCIENCE | 2021年 / 56卷 / 34期
关键词：
IMPRESSION CREEP; MECHANICAL-PROPERTIES; SUPERPLASTIC FLOW; MICROSTRUCTURE; DEFORMATION; BEHAVIOR; PLASTICITY;
D O I：
10.1007/s10853-021-06527-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Low temperature tensile and impression creep tests were carried out on an ultrafine-grained 7xxx series Al-4.8Zn-1.2 Mg-0.14Zr (wt%) alloy, which can be deformed for maximum elongation of about 200% at 150 degrees C. The characteristics of the deformation process, such as the strain rate sensitivity (SRS) and activation energy (Q) were determined by considering also the effect of threshold stress. Relatively high SRS of similar to 0.35 and low activation energy of similar to 92 kJ/mole were obtained, confirming the super ductility of the investigated ultrafinegrained alloy in the low temperature region between 140 and 160 degrees C.
引用
收藏
页码：19244 / 19252
页数：9
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