Effect of thermal stabilization on microstructure and mechanical property of directionally solidified Ti-46Al-0.5W-0.5Si alloy

Jiang Lei Fan; Xin Zhong Li; Yan Qing Su; Rui Run Chen; Jing Jie Guo; Heng Zhi Fu

doi:10.1016/S1003-6326(11)61285-5

Effect of thermal stabilization on microstructure and mechanical property of directionally solidified Ti-46Al-0.5W-0.5Si alloy

Jiang Lei Fan^*
, Xin Zhong Li
, Yan Qing Su
, Rui Run Chen
, Jing Jie Guo
, Heng Zhi Fu

^*Corresponding author for this work

Harbin Institute of Technology

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

7 Scopus citations

Abstract

Effect of thermal stabilization on the microstructure and mechanical property of directionally solidified Ti-46Al-0.5W-0.5Si (mole fraction,% ) alloy was investigated. The specimens were thermal stabilized for different time (t) and directionally solidified at a constant growth rate of 30 μm/s and temperature gradient of 20 K/mm. Dependencies of the primary dendritic spacing (λ ₁), secondary dendritic spacing (λ ₂), interlamellar spacing (λ _L) and microhardness (HV) on holding time were determined. The values of the λ ₁, λ ₂ and λ _L increase with the increase of t, and the value of HV decreases with the increase of t. The increase of t is helpful to obtain a good directional solidification structure. However, it reduces the mechanical property of the directionally solidified TiAl alloy. The optimized value of t is about 30 min.

Original language	English
Pages (from-to)	1073-1080
Number of pages	8
Journal	Transactions of Nonferrous Metals Society of China (English Edition)
Volume	22
Issue number	5
DOIs	https://doi.org/10.1016/S1003-6326(11)61285-5
State	Published - May 2012
Externally published	Yes

Keywords

TiAl-based alloy
crystal growth
intermetallics
mechanical properties
microstructure evolution

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10.1016/S1003-6326(11)61285-5

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@article{bec3f66979a94a0caf4b2499ab79c778,

title = "Effect of thermal stabilization on microstructure and mechanical property of directionally solidified Ti-46Al-0.5W-0.5Si alloy",

abstract = "Effect of thermal stabilization on the microstructure and mechanical property of directionally solidified Ti-46Al-0.5W-0.5Si (mole fraction,\% ) alloy was investigated. The specimens were thermal stabilized for different time (t) and directionally solidified at a constant growth rate of 30 μm/s and temperature gradient of 20 K/mm. Dependencies of the primary dendritic spacing (λ 1), secondary dendritic spacing (λ 2), interlamellar spacing (λ L) and microhardness (HV) on holding time were determined. The values of the λ 1, λ 2 and λ L increase with the increase of t, and the value of HV decreases with the increase of t. The increase of t is helpful to obtain a good directional solidification structure. However, it reduces the mechanical property of the directionally solidified TiAl alloy. The optimized value of t is about 30 min.",

keywords = "TiAl-based alloy, crystal growth, intermetallics, mechanical properties, microstructure evolution",

author = "Fan, \{Jiang Lei\} and Li, \{Xin Zhong\} and Su, \{Yan Qing\} and Chen, \{Rui Run\} and Guo, \{Jing Jie\} and Fu, \{Heng Zhi\}",

year = "2012",

month = may,

doi = "10.1016/S1003-6326(11)61285-5",

language = "英语",

volume = "22",

pages = "1073--1080",

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

issn = "1003-6326",

publisher = "Nonferrous Metals Society of China",

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}

TY - JOUR

T1 - Effect of thermal stabilization on microstructure and mechanical property of directionally solidified Ti-46Al-0.5W-0.5Si alloy

AU - Fan, Jiang Lei

AU - Li, Xin Zhong

AU - Su, Yan Qing

AU - Chen, Rui Run

AU - Guo, Jing Jie

AU - Fu, Heng Zhi

PY - 2012/5

Y1 - 2012/5

N2 - Effect of thermal stabilization on the microstructure and mechanical property of directionally solidified Ti-46Al-0.5W-0.5Si (mole fraction,% ) alloy was investigated. The specimens were thermal stabilized for different time (t) and directionally solidified at a constant growth rate of 30 μm/s and temperature gradient of 20 K/mm. Dependencies of the primary dendritic spacing (λ 1), secondary dendritic spacing (λ 2), interlamellar spacing (λ L) and microhardness (HV) on holding time were determined. The values of the λ 1, λ 2 and λ L increase with the increase of t, and the value of HV decreases with the increase of t. The increase of t is helpful to obtain a good directional solidification structure. However, it reduces the mechanical property of the directionally solidified TiAl alloy. The optimized value of t is about 30 min.

AB - Effect of thermal stabilization on the microstructure and mechanical property of directionally solidified Ti-46Al-0.5W-0.5Si (mole fraction,% ) alloy was investigated. The specimens were thermal stabilized for different time (t) and directionally solidified at a constant growth rate of 30 μm/s and temperature gradient of 20 K/mm. Dependencies of the primary dendritic spacing (λ 1), secondary dendritic spacing (λ 2), interlamellar spacing (λ L) and microhardness (HV) on holding time were determined. The values of the λ 1, λ 2 and λ L increase with the increase of t, and the value of HV decreases with the increase of t. The increase of t is helpful to obtain a good directional solidification structure. However, it reduces the mechanical property of the directionally solidified TiAl alloy. The optimized value of t is about 30 min.

KW - TiAl-based alloy

KW - crystal growth

KW - intermetallics

KW - mechanical properties

KW - microstructure evolution

UR - https://www.scopus.com/pages/publications/84861945602

U2 - 10.1016/S1003-6326(11)61285-5

DO - 10.1016/S1003-6326(11)61285-5

M3 - 文章

AN - SCOPUS:84861945602

SN - 1003-6326

VL - 22

SP - 1073

EP - 1080

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

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

IS - 5

ER -

Effect of thermal stabilization on microstructure and mechanical property of directionally solidified Ti-46Al-0.5W-0.5Si alloy

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Keywords

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