Superplastic behaviour of ultrafine-grained Ti-6A1-4V alloys

被引：135
作者：
Sergueeva, AV
Stolyarov, VV
Valiev, RZ
Mukherjee, AK [1 ]
机构：
[1] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA
[2] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa 450000, Russia
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2002年 / 323卷 / 1-2期
基金：
美国国家科学基金会;
关键词：
ultrafine-grained titanium alloy; severe plastic deformation; superplasticity;
D O I：
10.1016/S0921-5093(01)01384-3
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Superplastic behavior of the ultrafine-grained (UFG) Ti-6AI-4V alloy produced by high pressure torsion (HPT) has been studied. High elongations (more than 500%) have been observed in this alloy during tensile tests at relatively low temperatures and high strain rates. At the same time, the superplastic behavior of this alloy hits several Specific features such its the relatively low values of strain rate sensitivity of flow stress and significant strain hardening. Moreover. it was shown that the alloy. processed by HPT, demonstrates an outstanding room temperature strength about 1500 MPa after superplastic deformation. (C) 2002 Elsevier Science B.V. All rights reserved.
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收藏
页码：318 / 325
页数：8
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