Deformation Induced Phase Seperation of Ni45Co5 Mn36.7In13.3 Alloy at High Temperature

Zuo, Liang; Wang, Gang; Wang, Yan Dong; Liu, Yan Dong; Zhao, Wen Ru; Wang, Chun Yan; Chen, Zhe

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Paper Titles

Restitution of Prior-Austenite Grain Orientation by Microtexture Analysis of Tempered Martensite Structure in 9Cr-1Mo Ferritic Steel, p.880
Textural Evolution Evaluated by EBSD and XRD after Thermal Treatment in Ni-Ti Shape Memory Alloy, p.884
Microstructural Irreversibilities under Thermal Cycling in Ni-Ti-Fe Shape Memory Alloys, p.888
Evolution of Texture and Microstructure during Cold Rolling and Annealing of Fe-14Mn-6Si-9Cr-5Ni Shape Memory Alloy, p.892
Deformation Induced Phase Seperation of Ni₄₅Co₅ Mn_36.7In_13.3 Alloy at High Temperature, p.896
Variants of Texture Formation by Rolling of Ti-Ni Single Crystals with Shape Memory Properties, p.900
TEM Studies on the Microstructural Changes during Thermo-Mechanical Cycling of NiTi Shape Memory Alloy Wire, p.904
Texture Formation in Thin Tapes from Ni-Based Ternary Alloys with Cr, W, Mo and V, p.908
Texture of Electrodeposited Nanocrystalline Ni-Fe with Banded Structure, p.912

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Paper Title:

Deformation Induced Phase Seperation of Ni₄₅Co₅ Mn_36.7In_13.3 Alloy at High Temperature

Periodical	Materials Science Forum (Volumes 702 - 703)
Main Theme	Textures of Materials - ICOTOM 16
Edited by	Asim Tewari, Satyam Suwas, Dinesh Srivastava, Indradev Samajdar and Arunansu Haldar
Pages	896-899
DOI	10.4028/www.scientific.net/MSF.702-703.896
Citation	Gang Wang et al., 2011, Materials Science Forum, 702-703, 896
Online since	December, 2011
Authors	Gang Wang, Chun Yan Wang, Zhe Chen, Wen Ru Zhao, Yan Dong Liu, Yan Dong Wang, Liang Zuo
Keywords	Hot Deformation, NiMnCoIn Alloy, Second Phase, Structure, Temperature
Price	US$ 28,-

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Abstract

NiMnCoIn alloys are new-type magnetic shape memory alloys (MSMAs) in which a reversible magnetic-field-induced phase transformation was observed. They are ideal candidates of materials used in actuators and sensors. The polycrystalline NiMnCoIn alloys are generally brittle so that they can not be easily deformed into the shape applicable to actuators and sensors until now. In the present paper, the influence of hot deformation on the microstructure of Ni₄₅Co₅ Mn_36.7In_13.3 alloy was studied. The experimental results showed that second phase was observed after deformation at high temperature between 800~900 ºC and at strain rate lower than 4×10^-3s^-1. The content of Co of second phase was higher than the matrix alloy, while the content of In was lower than the matrix alloy. It was determined by TEM measurements as γ phase with fcc structure which was popular in NiFeGa and NiMnGaCo alloys. It is possible to improve the ductility of Ni₄₅Co₅Mn_36.7In_13.3 alloy by control of amount and distribution of γ phase by hot deformation.