Deformation mechanism of Ni54Mn25Ga20.9Gd0.1 high-temperature shape memory alloy

Xin Zhang; Jiehe Sui; Wei Cai; Qingsuo Liu; Ailian Liu

doi:10.1016/j.intermet.2015.07.017

Deformation mechanism of Ni₅₄Mn₂₅Ga_20.9Gd_0.1 high-temperature shape memory alloy

Xin Zhang^*
, Jiehe Sui
, Wei Cai
, Qingsuo Liu
, Ailian Liu

^*Corresponding author for this work

School of Materials Science and Engineering

Tianjin University of Technology
Heilongjiang University of Science and Technology

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

4 Scopus citations

Abstract

Ni₅₄Mn₂₅Ga_20.9Gd_0.1 polycrystalline high-temperature shape memory alloy displayed high compressive fracture strain of 24.6% and large shape memory effect of 7.5%. However, its deformation mechanism was still unknown. In this paper, the structure revolution characterized by XRD and TEM indicated a new deformation mechanism different before was found. The deformation process of Ni₅₄Mn₂₅Ga_20.9Gd_0.1 alloy could be divided into four stages, including elastic deformation of non-modulated tetragonal martensite (T), stress-induced T to seven-layered modulated martensite (7 M) transformation, variants reorientation of 7 M, and elastic-plastic deformation of reoriented 7 M. The 7 M formed by compression deformation disappeared completely after heating to the temperature above A_f.

Original language	English
Pages (from-to)	52-55
Number of pages	4
Journal	Intermetallics
Volume	67
DOIs	https://doi.org/10.1016/j.intermet.2015.07.017
State	Published - 13 Aug 2015

Keywords

Electron microscopy, transmission
Martensitic transformation
Mechanical testing
Microstructure
Shape-memory alloys

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10.1016/j.intermet.2015.07.017

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title = "Deformation mechanism of Ni54Mn25Ga20.9Gd0.1 high-temperature shape memory alloy",

abstract = "Ni54Mn25Ga20.9Gd0.1 polycrystalline high-temperature shape memory alloy displayed high compressive fracture strain of 24.6\% and large shape memory effect of 7.5\%. However, its deformation mechanism was still unknown. In this paper, the structure revolution characterized by XRD and TEM indicated a new deformation mechanism different before was found. The deformation process of Ni54Mn25Ga20.9Gd0.1 alloy could be divided into four stages, including elastic deformation of non-modulated tetragonal martensite (T), stress-induced T to seven-layered modulated martensite (7 M) transformation, variants reorientation of 7 M, and elastic-plastic deformation of reoriented 7 M. The 7 M formed by compression deformation disappeared completely after heating to the temperature above Af.",

keywords = "Electron microscopy, transmission, Martensitic transformation, Mechanical testing, Microstructure, Shape-memory alloys",

author = "Xin Zhang and Jiehe Sui and Wei Cai and Qingsuo Liu and Ailian Liu",

year = "2015",

month = aug,

day = "13",

doi = "10.1016/j.intermet.2015.07.017",

language = "英语",

volume = "67",

pages = "52--55",

journal = "Intermetallics",

issn = "0966-9795",

publisher = "Elsevier Ltd",

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TY - JOUR

T1 - Deformation mechanism of Ni54Mn25Ga20.9Gd0.1 high-temperature shape memory alloy

AU - Zhang, Xin

AU - Sui, Jiehe

AU - Cai, Wei

AU - Liu, Qingsuo

AU - Liu, Ailian

PY - 2015/8/13

Y1 - 2015/8/13

N2 - Ni54Mn25Ga20.9Gd0.1 polycrystalline high-temperature shape memory alloy displayed high compressive fracture strain of 24.6% and large shape memory effect of 7.5%. However, its deformation mechanism was still unknown. In this paper, the structure revolution characterized by XRD and TEM indicated a new deformation mechanism different before was found. The deformation process of Ni54Mn25Ga20.9Gd0.1 alloy could be divided into four stages, including elastic deformation of non-modulated tetragonal martensite (T), stress-induced T to seven-layered modulated martensite (7 M) transformation, variants reorientation of 7 M, and elastic-plastic deformation of reoriented 7 M. The 7 M formed by compression deformation disappeared completely after heating to the temperature above Af.

AB - Ni54Mn25Ga20.9Gd0.1 polycrystalline high-temperature shape memory alloy displayed high compressive fracture strain of 24.6% and large shape memory effect of 7.5%. However, its deformation mechanism was still unknown. In this paper, the structure revolution characterized by XRD and TEM indicated a new deformation mechanism different before was found. The deformation process of Ni54Mn25Ga20.9Gd0.1 alloy could be divided into four stages, including elastic deformation of non-modulated tetragonal martensite (T), stress-induced T to seven-layered modulated martensite (7 M) transformation, variants reorientation of 7 M, and elastic-plastic deformation of reoriented 7 M. The 7 M formed by compression deformation disappeared completely after heating to the temperature above Af.

KW - Electron microscopy, transmission

KW - Martensitic transformation

KW - Mechanical testing

KW - Microstructure

KW - Shape-memory alloys

UR - https://www.scopus.com/pages/publications/84939223349

U2 - 10.1016/j.intermet.2015.07.017

DO - 10.1016/j.intermet.2015.07.017

M3 - 文章

AN - SCOPUS:84939223349

SN - 0966-9795

VL - 67

SP - 52

EP - 55

JO - Intermetallics

JF - Intermetallics

ER -

Deformation mechanism of Ni₅₄Mn₂₅Ga_20.9Gd_0.1 high-temperature shape memory alloy

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Keywords

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