材料科学技术(英文版)2021，Vol.65Issue(6) ：228-237.

In-situ microstructural investigations of the TRIP-to-TWIP evolution in Ti-Mo-Zr alloys as a function of Zr concentration

Bingnan Qian Jinyong Zhang Yangyang Fu Fan Sun Yuan Wu Jun Cheng Philippe Vermaut Frédéric Prima
材料科学技术(英文版)2021，Vol.65Issue(6) ：228-237.
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In-situ microstructural investigations of the TRIP-to-TWIP evolution in Ti-Mo-Zr alloys as a function of Zr concentration

Bingnan Qian 1Jinyong Zhang 2Yangyang Fu 3Fan Sun 1Yuan Wu 4Jun Cheng 5Philippe Vermaut 6Frédéric Prima1
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作者信息

  • 1. Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France
  • 2. School of Material Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China;State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China
  • 3. School of Material Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China
  • 4. Store Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
  • 5. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China;Northwest Institute for Non-ferrous Metal Research, Shaanxi Key Laboratory of Biomedical Metal Materials, Xi'an 710016, China
  • 6. Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France;Sorbonne Universities, UPMC University Paris, UFR926, 75005 Paris, France
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Abstract

Aiming at overcoming the strength-ductility trade-off in structural Ti-alloys,a new family of TRIP/TWIP Ti-alloys was developed in the past decade (TWIP: twinning-induced plasticity;TRIP: transformationinduced plasticity).Herein,we study the tunable nature of deformation mechanisms with various TWIP and TRIP contributions by fine adjustment of the Zr content on ternary Ti-12Mo-xZr (x =3,6,10) alloys.The microstructure and deformation mechanisms of the Ti-Mo-Zr alloys are explored by using in-situ electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM).The results show that a transition of the dominant deformation mode occurred,going from TRIP to TWIP major mechanism with increasing Zr content.In the Ti-12Mo-3Zr alloy,the stress-induced martensitic transformation (SIM) is the major deformation mode which accommodates the plastic flow.Regarding the Ti-12Mo-6Zr alloy,the combined deformation twinning (DT) and SIM modes both contribute to the overall plasticity with enhanced strain-hardening rate and subsequent large uniform ductility.Further increase of the Zr content in Ti-12Mo-10Zr alloy leads to an improved yield stress involving single DT mode as a dominant deformation mechanism throughout the plastic regime.In the present work,a set of comprehensive in-situ and ex-situ microstructural investigations clarify the evolution of deformation microstructures during tensile loading and unloading processes.

Key words

Metastable beta (β) Ti-alloys/TRIP/TWIP effects/Deformation mechanisms/In-situ traction-EBSD/TEM observation

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基金项目

出版年

2021
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)

CSTPCDCSCDSCI
影响因子：0.657
ISSN：1005-0302
参考文献量37
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