A novel stress-induced martensitic transformation in a single-phase refractory high-entropy alloy

Liang Wang; Tangqing Cao; Xudong Liu; Benpeng Wang; Ke Jin; Yaojian Liang; Lu Wang; Fuchi Wang; Yang Ren; Jun Liang; Yunfei Xue

doi:10.1016/j.scriptamat.2020.08.013

A novel stress-induced martensitic transformation in a single-phase refractory high-entropy alloy

Liang Wang, Tangqing Cao, Xudong Liu, Benpeng Wang, Ke Jin, Yaojian Liang, Lu Wang, Fuchi Wang, Yang Ren, Jun Liang, Yunfei Xue^*

^*Corresponding author for this work

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

28 Citations (Scopus)

Abstract

High-entropy alloys (HEAs) provide a new perspective to design metastable alloys with the stress-induced martensitic transformation (SIMT) for overcoming the strength-ductility trade-off. Here, we report a novel SIMT, orthorhombic to hexagonal close-packed martensite, in a single orthorhombic refractory HEA (Ti₁₆Zr₃₅Hf₃₅Ta₁₄ RHEA), showing a good yield strength-ductility matching. The analysis of the elastic distortion energy (∆E_els) of Ti₁₆Zr₃₅Hf₃₅Ta₁₄ and several other RHEAs reveals that severe lattice distortion is a key factor which causes this SIMT. Combined the “d-electron alloy design” approach with the ∆E_els, the phase configuration and SIMT path in RHEAs can be well predicted. Our work brings new insights between the lattice distortion and SIMT of RHEAs, benefiting the metastable alloy development.

Original language	English
Pages (from-to)	129-134
Number of pages	6
Journal	Scripta Materialia
Volume	189
DOIs	https://doi.org/10.1016/j.scriptamat.2020.08.013
Publication status	Published - Dec 2020

Keywords

High energy X-ray diffraction
High-entropy alloys
Lattice distortion
Martensitic transformation
Phase stability

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10.1016/j.scriptamat.2020.08.013

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title = "A novel stress-induced martensitic transformation in a single-phase refractory high-entropy alloy",

abstract = "High-entropy alloys (HEAs) provide a new perspective to design metastable alloys with the stress-induced martensitic transformation (SIMT) for overcoming the strength-ductility trade-off. Here, we report a novel SIMT, orthorhombic to hexagonal close-packed martensite, in a single orthorhombic refractory HEA (Ti16Zr35Hf35Ta14 RHEA), showing a good yield strength-ductility matching. The analysis of the elastic distortion energy (∆Eels) of Ti16Zr35Hf35Ta14 and several other RHEAs reveals that severe lattice distortion is a key factor which causes this SIMT. Combined the “d-electron alloy design” approach with the ∆Eels, the phase configuration and SIMT path in RHEAs can be well predicted. Our work brings new insights between the lattice distortion and SIMT of RHEAs, benefiting the metastable alloy development.",

keywords = "High energy X-ray diffraction, High-entropy alloys, Lattice distortion, Martensitic transformation, Phase stability",

author = "Liang Wang and Tangqing Cao and Xudong Liu and Benpeng Wang and Ke Jin and Yaojian Liang and Lu Wang and Fuchi Wang and Yang Ren and Jun Liang and Yunfei Xue",

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

year = "2020",

month = dec,

doi = "10.1016/j.scriptamat.2020.08.013",

language = "English",

volume = "189",

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T1 - A novel stress-induced martensitic transformation in a single-phase refractory high-entropy alloy

AU - Wang, Liang

AU - Cao, Tangqing

AU - Liu, Xudong

AU - Wang, Benpeng

AU - Jin, Ke

AU - Liang, Yaojian

AU - Wang, Lu

AU - Wang, Fuchi

AU - Ren, Yang

AU - Liang, Jun

AU - Xue, Yunfei

PY - 2020/12

Y1 - 2020/12

N2 - High-entropy alloys (HEAs) provide a new perspective to design metastable alloys with the stress-induced martensitic transformation (SIMT) for overcoming the strength-ductility trade-off. Here, we report a novel SIMT, orthorhombic to hexagonal close-packed martensite, in a single orthorhombic refractory HEA (Ti16Zr35Hf35Ta14 RHEA), showing a good yield strength-ductility matching. The analysis of the elastic distortion energy (∆Eels) of Ti16Zr35Hf35Ta14 and several other RHEAs reveals that severe lattice distortion is a key factor which causes this SIMT. Combined the “d-electron alloy design” approach with the ∆Eels, the phase configuration and SIMT path in RHEAs can be well predicted. Our work brings new insights between the lattice distortion and SIMT of RHEAs, benefiting the metastable alloy development.

AB - High-entropy alloys (HEAs) provide a new perspective to design metastable alloys with the stress-induced martensitic transformation (SIMT) for overcoming the strength-ductility trade-off. Here, we report a novel SIMT, orthorhombic to hexagonal close-packed martensite, in a single orthorhombic refractory HEA (Ti16Zr35Hf35Ta14 RHEA), showing a good yield strength-ductility matching. The analysis of the elastic distortion energy (∆Eels) of Ti16Zr35Hf35Ta14 and several other RHEAs reveals that severe lattice distortion is a key factor which causes this SIMT. Combined the “d-electron alloy design” approach with the ∆Eels, the phase configuration and SIMT path in RHEAs can be well predicted. Our work brings new insights between the lattice distortion and SIMT of RHEAs, benefiting the metastable alloy development.

KW - High energy X-ray diffraction

KW - High-entropy alloys

KW - Lattice distortion

KW - Martensitic transformation

KW - Phase stability

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DO - 10.1016/j.scriptamat.2020.08.013

M3 - Article

AN - SCOPUS:85089580016

SN - 1359-6462

VL - 189

SP - 129

EP - 134

JO - Scripta Materialia

JF - Scripta Materialia

ER -

A novel stress-induced martensitic transformation in a single-phase refractory high-entropy alloy

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Keywords

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