首页|Achieving large near-linear elasticity,low modulus,and high strength in a metastable β-Ti alloy by mild cold rolling

Achieving large near-linear elasticity,low modulus,and high strength in a metastable β-Ti alloy by mild cold rolling

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Simultaneously achieving high elasticity,low modulus,and high strength in Ti alloy has been a long-standing challenge.In this study,cold rolling was conducted to modulate the martensitic transformation of the Ti-15Nb-5Zr-4Sn-1Fe alloy to address this challenge.The 10％cold rolling process was primarily ac-commodated by a novel stress-induced sequential β-to-α"-to-α'martensitic transformation accompanied by the disappearance of ω phase,which was sufficient to induce adequate martensite and defects to sup-press the initial rapid stress-induced martensitic transformation,without destroying the equiaxed shape of prior β grains.Consequently,the novel sequential phase transformation led to a substantial decrease in Young's modulus by 50.5％while increasing the strength,resulting in an excellent combination of large near-linear elasticity of 2.34％,low modulus of 45 GPa,and high strength of 1093 MPa.The obtained large near-linear elasticity was mainly contributed by the concurrent low modulus and high strength obeying Hooke's law.These findings provide valuable insights into the attainment of concurrent high elasticity and low modulus in Ti alloys by regulating the stress-induced sequential martensitic transformation.

Titanium alloysMartensitic transformationYoung's modulusElasticityMechanical properties

Yu Fu、Wenlong Xiao、Jian Rong、Lei Ren、Huabei Peng、Yuhua Wen、Xinqing Zhao、Chaoli Ma

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Key Laboratory of Aerospace Advanced Materials and Performance of Ministry of Education,School of Materials Science and Engineering,Beihang University,Beijing 100191,China

Scholl of Mechanical Engineering,Sichuan University,Chengdu 610065,China

Tianmushan Laboratory,Hangzhou 310023,China

Key Laboratory of Aerospace Advanced Materials and Performance of Ministry of Education,School of Materials Science and Engineering Beihang University,Beijing,100191,China

Key Laboratory of Mechanics in Fluid Solid Coupling Systems,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaYouth Talent Support Program of Beihang University

5167101252001018

2024

10.1016/j.jmst.2023.11.066

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.189(22)