Reaction-diffusion bonding of high Nb containing TiAl alloy

Xiaoguo Song; Jian Cao; Jiakun Liu; Liyan Zhao; Jicai Feng

Reaction-diffusion bonding of high Nb containing TiAl alloy

Xiaoguo Song
, Jian Cao^*
, Jiakun Liu
, Liyan Zhao
, Jicai Feng

^*Corresponding author for this work

Harbin Institute of Technology Weihai
Harbin Institute of Technology

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

11 Scopus citations

Abstract

In this study, high Nb containing TiAl alloy (TAN) was welded by reaction-diffusion bonding using Al foil as interlayer at 1200°C for 2 h. The desired full lamellar microstructure (γ+α₂) was obtained across the bonding seam when the joint was heat-treated according to the heat treatment process of TAN alloy. The present paper also investigated microstructure and bonding mechanism in details. The results show that liquid Al can react with TAN to form TiAl₃ intermetallic layer, and then the TiAl₃ layer will transform to γ-TiAl by solid-state diffusion at high temperature, finally a full lamellar structure is formed after heat treatment. Furthermore, sound joints with full lamellar structure can be also obtained when TAN alloy is directly bonded in accordance with the heat treatment cycle of TAN alloy.

Original language	English
Pages (from-to)	28-31
Number of pages	4
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	43
Issue number	1
State	Published - Jan 2014

Keywords

Diffusion
Interfacial microstructure
Intermetallic alloys
Joining

Cite this

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title = "Reaction-diffusion bonding of high Nb containing TiAl alloy",

abstract = "In this study, high Nb containing TiAl alloy (TAN) was welded by reaction-diffusion bonding using Al foil as interlayer at 1200°C for 2 h. The desired full lamellar microstructure (γ+α2) was obtained across the bonding seam when the joint was heat-treated according to the heat treatment process of TAN alloy. The present paper also investigated microstructure and bonding mechanism in details. The results show that liquid Al can react with TAN to form TiAl3 intermetallic layer, and then the TiAl3 layer will transform to γ-TiAl by solid-state diffusion at high temperature, finally a full lamellar structure is formed after heat treatment. Furthermore, sound joints with full lamellar structure can be also obtained when TAN alloy is directly bonded in accordance with the heat treatment cycle of TAN alloy.",

keywords = "Diffusion, Interfacial microstructure, Intermetallic alloys, Joining",

author = "Xiaoguo Song and Jian Cao and Jiakun Liu and Liyan Zhao and Jicai Feng",

year = "2014",

month = jan,

language = "英语",

volume = "43",

pages = "28--31",

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

issn = "1002-185X",

publisher = "Science Press ",

number = "1",

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TY - JOUR

T1 - Reaction-diffusion bonding of high Nb containing TiAl alloy

AU - Song, Xiaoguo

AU - Cao, Jian

AU - Liu, Jiakun

AU - Zhao, Liyan

AU - Feng, Jicai

PY - 2014/1

Y1 - 2014/1

N2 - In this study, high Nb containing TiAl alloy (TAN) was welded by reaction-diffusion bonding using Al foil as interlayer at 1200°C for 2 h. The desired full lamellar microstructure (γ+α2) was obtained across the bonding seam when the joint was heat-treated according to the heat treatment process of TAN alloy. The present paper also investigated microstructure and bonding mechanism in details. The results show that liquid Al can react with TAN to form TiAl3 intermetallic layer, and then the TiAl3 layer will transform to γ-TiAl by solid-state diffusion at high temperature, finally a full lamellar structure is formed after heat treatment. Furthermore, sound joints with full lamellar structure can be also obtained when TAN alloy is directly bonded in accordance with the heat treatment cycle of TAN alloy.

AB - In this study, high Nb containing TiAl alloy (TAN) was welded by reaction-diffusion bonding using Al foil as interlayer at 1200°C for 2 h. The desired full lamellar microstructure (γ+α2) was obtained across the bonding seam when the joint was heat-treated according to the heat treatment process of TAN alloy. The present paper also investigated microstructure and bonding mechanism in details. The results show that liquid Al can react with TAN to form TiAl3 intermetallic layer, and then the TiAl3 layer will transform to γ-TiAl by solid-state diffusion at high temperature, finally a full lamellar structure is formed after heat treatment. Furthermore, sound joints with full lamellar structure can be also obtained when TAN alloy is directly bonded in accordance with the heat treatment cycle of TAN alloy.

KW - Diffusion

KW - Interfacial microstructure

KW - Intermetallic alloys

KW - Joining

UR - https://www.scopus.com/pages/publications/84894779864

M3 - 文章

AN - SCOPUS:84894779864

SN - 1002-185X

VL - 43

SP - 28

EP - 31

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 -

Reaction-diffusion bonding of high Nb containing TiAl alloy

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Keywords

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