Simultaneously enhanced strength and ductility in a metastable β-Ti alloy by stress-induced hierarchical twin structure

Lei Ren; Wenlong Xiao; Damon Kent; Min Wan; Chaoli Ma; Lian Zhou

doi:10.1016/j.scriptamat.2020.03.039

Simultaneously enhanced strength and ductility in a metastable β-Ti alloy by stress-induced hierarchical twin structure

Lei Ren
, Wenlong Xiao^*
, Damon Kent
, Min Wan
, Chaoli Ma
, Lian Zhou

^*Corresponding author for this work

University of the Sunshine Coast
University of Queensland
Beihang University
Northwest Institute for Nonferrous Metal Research

Research output: Contribution to journal › Article › peer-review

131 Scopus citations

Abstract

A novel metastable β-Ti alloy Ti-4Mo-3Cr-1Fe with high strength and high ductility was developed through controlling the alloyʼs stability and deformation mechanisms. The microstructure consists of randomly oriented β-grains containing an even distribution of athermal ω precipitates. Under tensile loading, the alloy exhibits unprecedented and comprehensive mechanical properties including a high yield strength of 870 MPa, excellent total elongation of 41% and an ultrahigh strain hardening rate of 2.5 GPa. Based on investigations of deformation microstructures, the superior mechanical properties are attributed to stress-induced formation of a complex nano-scale hierarchical twin structure which is promoted by reversion of ω precipitates.

Original language	English
Pages (from-to)	6-11
Number of pages	6
Journal	Scripta Materialia
Volume	184
DOIs	https://doi.org/10.1016/j.scriptamat.2020.03.039
State	Published - 15 Jul 2020

Keywords

Ductility
Hierarchical twin structure
Metastable β-Ti alloy
Microstructure
Strength

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10.1016/j.scriptamat.2020.03.039

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title = "Simultaneously enhanced strength and ductility in a metastable β-Ti alloy by stress-induced hierarchical twin structure",

abstract = "A novel metastable β-Ti alloy Ti-4Mo-3Cr-1Fe with high strength and high ductility was developed through controlling the alloyʼs stability and deformation mechanisms. The microstructure consists of randomly oriented β-grains containing an even distribution of athermal ω precipitates. Under tensile loading, the alloy exhibits unprecedented and comprehensive mechanical properties including a high yield strength of 870 MPa, excellent total elongation of 41\% and an ultrahigh strain hardening rate of 2.5 GPa. Based on investigations of deformation microstructures, the superior mechanical properties are attributed to stress-induced formation of a complex nano-scale hierarchical twin structure which is promoted by reversion of ω precipitates.",

keywords = "Ductility, Hierarchical twin structure, Metastable β-Ti alloy, Microstructure, Strength",

author = "Lei Ren and Wenlong Xiao and Damon Kent and Min Wan and Chaoli Ma and Lian Zhou",

note = "Publisher Copyright: {\textcopyright} 2020",

year = "2020",

month = jul,

day = "15",

doi = "10.1016/j.scriptamat.2020.03.039",

language = "英语",

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TY - JOUR

T1 - Simultaneously enhanced strength and ductility in a metastable β-Ti alloy by stress-induced hierarchical twin structure

AU - Ren, Lei

AU - Xiao, Wenlong

AU - Kent, Damon

AU - Wan, Min

AU - Ma, Chaoli

AU - Zhou, Lian

PY - 2020/7/15

Y1 - 2020/7/15

N2 - A novel metastable β-Ti alloy Ti-4Mo-3Cr-1Fe with high strength and high ductility was developed through controlling the alloyʼs stability and deformation mechanisms. The microstructure consists of randomly oriented β-grains containing an even distribution of athermal ω precipitates. Under tensile loading, the alloy exhibits unprecedented and comprehensive mechanical properties including a high yield strength of 870 MPa, excellent total elongation of 41% and an ultrahigh strain hardening rate of 2.5 GPa. Based on investigations of deformation microstructures, the superior mechanical properties are attributed to stress-induced formation of a complex nano-scale hierarchical twin structure which is promoted by reversion of ω precipitates.

AB - A novel metastable β-Ti alloy Ti-4Mo-3Cr-1Fe with high strength and high ductility was developed through controlling the alloyʼs stability and deformation mechanisms. The microstructure consists of randomly oriented β-grains containing an even distribution of athermal ω precipitates. Under tensile loading, the alloy exhibits unprecedented and comprehensive mechanical properties including a high yield strength of 870 MPa, excellent total elongation of 41% and an ultrahigh strain hardening rate of 2.5 GPa. Based on investigations of deformation microstructures, the superior mechanical properties are attributed to stress-induced formation of a complex nano-scale hierarchical twin structure which is promoted by reversion of ω precipitates.

KW - Ductility

KW - Hierarchical twin structure

KW - Metastable β-Ti alloy

KW - Microstructure

KW - Strength

UR - https://www.scopus.com/pages/publications/85082800742

U2 - 10.1016/j.scriptamat.2020.03.039

DO - 10.1016/j.scriptamat.2020.03.039

M3 - 文章

AN - SCOPUS:85082800742

SN - 1359-6462

VL - 184

SP - 6

EP - 11

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Simultaneously enhanced strength and ductility in a metastable β-Ti alloy by stress-induced hierarchical twin structure

Abstract

Keywords

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