Effect of Al addition on properties of TiNiFe shape memory alloys

Li Xiao; Fu Shun Liu; Hui Bin Xu

Effect of Al addition on properties of TiNiFe shape memory alloys

Li Xiao^*
, Fu Shun Liu
, Hui Bin Xu

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University

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

2 Scopus citations

Abstract

A little amount of aluminum substituting for Ni was added to Ti₅₀Ni₄₈Fe₂ and Ti₅₀Ni_47.5Fe_2.5 alloys to improve the mechanical properties, especially the yield stress of the TiNiFe alloys. The martensitic transformation temperature and mechanical properties of Ti₅₀Ni_48-xFe₂Al_x and Ti₅₀Ni_47.5-xFe_2.5Al_x (x=0, 0.5, 1) alloys were examined, and it was revealed that 0.5% and 1%(mole fraction) aluminum addition lead to about 10°C and 60-80°C martensitic transformation temperature (MS) decrease, respectively. 1%(mole fraction) aluminum addition enhances remarkably the yield stresses of Ti₅₀Ni₄₇Fe₂Al₁ and Ti₅₀Ni_46.5Fe_2.5Al₁ to 560 and 580 MPa, respectively. The systemic microstructure analysis indicates that the second phase Ti₂Ni at the grain boundaries plays an important role in improving the mechanical properties of TiNiFe shape memory alloys.

Original language	English
Pages (from-to)	100-103
Number of pages	4
Journal	Transactions of Nonferrous Metals Society of China (English Edition)
Volume	16
Issue number	SUPPL. 2
State	Published - Sep 2006

Keywords

Martensitic transformation temperature
Shape memory alloy
Yield strength

Cite this

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title = "Effect of Al addition on properties of TiNiFe shape memory alloys",

abstract = "A little amount of aluminum substituting for Ni was added to Ti50Ni48Fe2 and Ti50Ni47.5Fe2.5 alloys to improve the mechanical properties, especially the yield stress of the TiNiFe alloys. The martensitic transformation temperature and mechanical properties of Ti50Ni48-xFe2Alx and Ti50Ni47.5-xFe2.5Alx (x=0, 0.5, 1) alloys were examined, and it was revealed that 0.5\% and 1\%(mole fraction) aluminum addition lead to about 10°C and 60-80°C martensitic transformation temperature (MS) decrease, respectively. 1\%(mole fraction) aluminum addition enhances remarkably the yield stresses of Ti50Ni47Fe2Al1 and Ti50Ni46.5Fe2.5Al1 to 560 and 580 MPa, respectively. The systemic microstructure analysis indicates that the second phase Ti2Ni at the grain boundaries plays an important role in improving the mechanical properties of TiNiFe shape memory alloys.",

keywords = "Martensitic transformation temperature, Shape memory alloy, Yield strength",

author = "Li Xiao and Liu, \{Fu Shun\} and Xu, \{Hui Bin\}",

year = "2006",

month = sep,

language = "英语",

volume = "16",

pages = "100--103",

journal = "Transactions of Nonferrous Metals Society of China (English Edition)",

issn = "1003-6326",

publisher = "Nonferrous Metals Society of China",

number = "SUPPL. 2",

}

TY - JOUR

T1 - Effect of Al addition on properties of TiNiFe shape memory alloys

AU - Xiao, Li

AU - Liu, Fu Shun

AU - Xu, Hui Bin

PY - 2006/9

Y1 - 2006/9

N2 - A little amount of aluminum substituting for Ni was added to Ti50Ni48Fe2 and Ti50Ni47.5Fe2.5 alloys to improve the mechanical properties, especially the yield stress of the TiNiFe alloys. The martensitic transformation temperature and mechanical properties of Ti50Ni48-xFe2Alx and Ti50Ni47.5-xFe2.5Alx (x=0, 0.5, 1) alloys were examined, and it was revealed that 0.5% and 1%(mole fraction) aluminum addition lead to about 10°C and 60-80°C martensitic transformation temperature (MS) decrease, respectively. 1%(mole fraction) aluminum addition enhances remarkably the yield stresses of Ti50Ni47Fe2Al1 and Ti50Ni46.5Fe2.5Al1 to 560 and 580 MPa, respectively. The systemic microstructure analysis indicates that the second phase Ti2Ni at the grain boundaries plays an important role in improving the mechanical properties of TiNiFe shape memory alloys.

AB - A little amount of aluminum substituting for Ni was added to Ti50Ni48Fe2 and Ti50Ni47.5Fe2.5 alloys to improve the mechanical properties, especially the yield stress of the TiNiFe alloys. The martensitic transformation temperature and mechanical properties of Ti50Ni48-xFe2Alx and Ti50Ni47.5-xFe2.5Alx (x=0, 0.5, 1) alloys were examined, and it was revealed that 0.5% and 1%(mole fraction) aluminum addition lead to about 10°C and 60-80°C martensitic transformation temperature (MS) decrease, respectively. 1%(mole fraction) aluminum addition enhances remarkably the yield stresses of Ti50Ni47Fe2Al1 and Ti50Ni46.5Fe2.5Al1 to 560 and 580 MPa, respectively. The systemic microstructure analysis indicates that the second phase Ti2Ni at the grain boundaries plays an important role in improving the mechanical properties of TiNiFe shape memory alloys.

KW - Martensitic transformation temperature

KW - Shape memory alloy

KW - Yield strength

UR - https://www.scopus.com/pages/publications/33947211938

M3 - 文章

AN - SCOPUS:33947211938

SN - 1003-6326

VL - 16

SP - 100

EP - 103

JO - Transactions of Nonferrous Metals Society of China (English Edition)

JF - Transactions of Nonferrous Metals Society of China (English Edition)

IS - SUPPL. 2

ER -

Effect of Al addition on properties of TiNiFe shape memory alloys

Abstract

Keywords

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