Tensile properties and crack propagation of heat treated TiAl(W, Si) alloy

Hui Chen; Yanqing Su; Liangshun Luo; Xinzhong Li; Jingjie Guo; Hengzhi Fu

Tensile properties and crack propagation of heat treated TiAl(W, Si) alloy

Hui Chen^*
, Yanqing Su
, Liangshun Luo
, Xinzhong Li
, Jingjie Guo
, Hengzhi Fu

^*Corresponding author for this work

Harbin Institute of Technology
Northeast Forestry University

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

Abstract

Quenching and tempering heat treatment were carried out to the as-cast Ti-46Al-0.5W-0.5Si alloy, near lamellar and duplex microstructures were obtained. Tensile properties of the heat treated alloy were tested at room temperature. The fracture surface and the cracks adjacent to the fracture zone of the specimens were investigated to analyze the tensile fracture behavior. Results show that the ductility and tensile strength of duplex structure are better than that of near lamellar structure. The cracks in duplex structure can bypass the small γ phase particles, and propagate along the interface of γ phase particles and α₂/γ lamellar. The cracks also can propagate in a trans-lamellar mode. The cracks in near lamellar structure propagate in a mixed mode of inter-lamellar and trans-lamellar.

Original language	English
Pages (from-to)	158-161
Number of pages	4
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	43
Issue number	1
State	Published - Jan 2014
Externally published	Yes

Keywords

Crack propagation
Duplex microstructure
Near lamellar microstructure
Tensile test at room temperature
TiAl alloy

Cite this

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title = "Tensile properties and crack propagation of heat treated TiAl(W, Si) alloy",

abstract = "Quenching and tempering heat treatment were carried out to the as-cast Ti-46Al-0.5W-0.5Si alloy, near lamellar and duplex microstructures were obtained. Tensile properties of the heat treated alloy were tested at room temperature. The fracture surface and the cracks adjacent to the fracture zone of the specimens were investigated to analyze the tensile fracture behavior. Results show that the ductility and tensile strength of duplex structure are better than that of near lamellar structure. The cracks in duplex structure can bypass the small γ phase particles, and propagate along the interface of γ phase particles and α2/γ lamellar. The cracks also can propagate in a trans-lamellar mode. The cracks in near lamellar structure propagate in a mixed mode of inter-lamellar and trans-lamellar.",

keywords = "Crack propagation, Duplex microstructure, Near lamellar microstructure, Tensile test at room temperature, TiAl alloy",

author = "Hui Chen and Yanqing Su and Liangshun Luo and Xinzhong Li and Jingjie Guo and Hengzhi Fu",

year = "2014",

month = jan,

language = "英语",

volume = "43",

pages = "158--161",

journal = "Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering",

issn = "1002-185X",

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number = "1",

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TY - JOUR

T1 - Tensile properties and crack propagation of heat treated TiAl(W, Si) alloy

AU - Chen, Hui

AU - Su, Yanqing

AU - Luo, Liangshun

AU - Li, Xinzhong

AU - Guo, Jingjie

AU - Fu, Hengzhi

PY - 2014/1

Y1 - 2014/1

N2 - Quenching and tempering heat treatment were carried out to the as-cast Ti-46Al-0.5W-0.5Si alloy, near lamellar and duplex microstructures were obtained. Tensile properties of the heat treated alloy were tested at room temperature. The fracture surface and the cracks adjacent to the fracture zone of the specimens were investigated to analyze the tensile fracture behavior. Results show that the ductility and tensile strength of duplex structure are better than that of near lamellar structure. The cracks in duplex structure can bypass the small γ phase particles, and propagate along the interface of γ phase particles and α2/γ lamellar. The cracks also can propagate in a trans-lamellar mode. The cracks in near lamellar structure propagate in a mixed mode of inter-lamellar and trans-lamellar.

AB - Quenching and tempering heat treatment were carried out to the as-cast Ti-46Al-0.5W-0.5Si alloy, near lamellar and duplex microstructures were obtained. Tensile properties of the heat treated alloy were tested at room temperature. The fracture surface and the cracks adjacent to the fracture zone of the specimens were investigated to analyze the tensile fracture behavior. Results show that the ductility and tensile strength of duplex structure are better than that of near lamellar structure. The cracks in duplex structure can bypass the small γ phase particles, and propagate along the interface of γ phase particles and α2/γ lamellar. The cracks also can propagate in a trans-lamellar mode. The cracks in near lamellar structure propagate in a mixed mode of inter-lamellar and trans-lamellar.

KW - Crack propagation

KW - Duplex microstructure

KW - Near lamellar microstructure

KW - Tensile test at room temperature

KW - TiAl alloy

UR - https://www.scopus.com/pages/publications/84894797623

M3 - 文章

AN - SCOPUS:84894797623

SN - 1002-185X

VL - 43

SP - 158

EP - 161

JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - 1

ER -

Tensile properties and crack propagation of heat treated TiAl(W, Si) alloy

Abstract

Keywords

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