Development of a high strength and high ductility near β-Ti alloy with twinning induced plasticity effect

被引：112

作者：

Ren, Lei ^{[1
]}

Xiao, Wenlong ^{[1
]}

Ma, Chaoli ^{[1
]}

Zheng, Ruixiao ^{[1
]}

Zhou, Lian ^{[1
,2
]}

机构：

[1] Beihang Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Aerosp Adv Mat & Performance, Beijing 100191, Peoples R China

[2] Northwest Inst Nonferrous Met Res, Xian 710016, Shaanxi, Peoples R China

来源：

SCRIPTA MATERIALIA | 2018年 / 156卷

基金：

中国国家自然科学基金;

关键词：

Near beta-Ti alloys; d-Electron theory; Twinning; Microstructural evolution; Mechanical properties; TITANIUM-ALLOYS; MARTENSITIC-TRANSFORMATION; MECHANICAL-PROPERTIES; PHASE-STABILITY; YIELD STRENGTH;

D O I：

10.1016/j.scriptamat.2018.07.012

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A multi-alloyed near beta-Ti alloy Ti-6Cr-4Mo-2Al-2Sn-1Zr (Ti-64221) with high strength and high ductility was designed utilizing the d-electron theory combined with molybdenum equivalence approaches. Mechanical properties and microstructural evolution of the beta-solution treated alloy were investigated. The results show that Ti-64221 alloy exhibits excellent tensile strength, ultra-high total elongation and high ability of strain hardening. The product of strength and elongation is as high as 42.6 GPa% exceeded those achieved earlier in beta-Ti alloys. Mechanical activation of {332}< 113 > and {112}< 111 > twinning and the stress-induced phase transformation during the process of plastic deformation are benefited for enhanced strength and ductility. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：47 / 50

页数：4

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