Demonstrating a duplex TRIP/TWIP titanium alloy via the introduction of metastable retained β-phase

被引：10
作者：
Sesha, Karri Sri Naga [1 ,2 ]
Yamanaka, Kenta [1 ]
Mori, Manami [1 ,3 ]
Onuki, Yusuke [4 ]
Sato, Shigeo [5 ]
Fabregue, Damien [6 ,7 ]
Chiba, Akihiko [1 ]
机构：
[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi, Japan
[2] Tohoku Univ, Grad Sch Engn, Dept Mat Proc, Sendai, Miyagi, Japan
[3] Sendai Coll, Natl Inst Technol, Dept Gen Engn, Natori, Miyagi, Japan
[4] Ibaraki Univ, Frontier Res Ctr Appl Atom Sci, Tokai, Ibaraki, Japan
[5] Ibaraki Univ, Grad Sch Sci & Engn, Hitachi, Ibaraki, Japan
[6] Univ Lyon, INSA Lyon, Villeurbanne, France
[7] Tohoku Univ, ELyT Max, Sendai, Miyagi, Japan
来源：
MATERIALS RESEARCH LETTERS | 2022年 / 10卷 / 11期
关键词：
Titanium alloy; Martensitic transformation; TRIP/TWIP; Work hardening; WORK-HARDENING BEHAVIOR; MECHANICAL-PROPERTIES; DEFORMATION MECHANISMS; INDUCED MARTENSITE; TI-6AL-4V ALLOY; TI-ALLOYS; IN-SITU; AUSTENITE; STABILITY; MICROSTRUCTURE;
D O I：
10.1080/21663831.2022.2096419
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study demonstrates transformation-induced plasticity (TRIP) in conjunction with twinning-induced plasticity (TWIP) in alpha + beta titanium alloys by introducing metastable retained beta-phase. By annealing at 850 degrees C followed by water quenching, metastable retained beta-phase (similar to 25%) was obtained in Ti-6Al-4V alloy. Stress-induced phase transformation in the retained beta-phase produced orthorhombic alpha ''-martensite associated with (021)(alpha '') twinning, which significantly increased the work-hardening rate and uniform elongation. The findings reveal that the minor retained beta-phase is responsible for macroscopic deformation behavior and could aid in novel alloy design that can increase work hardenability with fewer alloying elements than currently available metastable beta-titanium alloys. IMPACT STATEMENT The minor metastable retained beta-phase in an alpha + beta titanium alloy with low alloy content enhanced work hardening because of the combined TRIP/TWIP effect.
引用
收藏
页码：754 / 761
页数：8
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