Ultrahigh strain hardening in a transformation-induced plasticity and twinning-induced plasticity titanium alloy

被引：109
作者：
Fu, Yu [1 ]
Xiao, Wenlong [1 ]
Kent, Damon [2 ,3 ]
Dargusch, Matthew S. [3 ]
Wang, Junshuai [1 ]
Zhao, Xinqing [1 ]
Ma, Chaoli [1 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, Key Lab Aerosp Adv Mat & Performance, Minist Educ, Beijing 100191, Peoples R China
[2] Univ Sunshine Coast, Sch Sci & Engn, Sunshine Coast, Qld 4575, Australia
[3] Univ Queensland, Queensland Ctr Adv Mat Proc & Mfg, Sch Mech & Min Engn, Brisbane, Qld 4072, Australia
来源：
SCRIPTA MATERIALIA | 2020年 / 187卷
基金：
中国国家自然科学基金;
关键词：
Titanium alloys; Strain hardening; Transformation-induced plasticity; Twinning-induced plasticity; Mechanical properties; HIGH-YIELD STRENGTH; TI ALLOY; MECHANISM; DUCTILITY;
D O I：
10.1016/j.scriptamat.2020.06.029
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this study, a design strategy employing stress-induced beta to hexagonal alpha' martensitic transformation to develop a novel Ti-15Nb-5Zr-4Sn-1Fe alloy with ultrahigh strain hardening rate (similar to 6.1 GPa) is reported. Microstructural investigations reveal that the superior strain hardening response is contributed by stress-induced beta to alpha' transformation with accompanying reversion of athermal omega and profuse internal {(1) over bar 011} <10<(1)over bar>2> and {11 (2) over bar2}<{11<(2)over bar>3> alpha' mechanical twinning which promote twin-twin interactions, imparting high strength and outstanding uniform elongation. This study may serve as a template for developing new class of transformation-induced plasticity (TRIP) and twinning-induced plasticity (TWIP) Ti alloys based on beta to alpha' martensitic transformation. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：285 / 290
页数：6
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