Effect of laser beam displacement on characteristics of laser welded Ti2AlNb/TC4 dissimilar alloy

Zhenglong Lei; Ming Liu; Kezhao Zhang; Yanbin Chen

doi:10.3788/CJL201542.1203008

Effect of laser beam displacement on characteristics of laser welded Ti₂AlNb/TC4 dissimilar alloy

School of Materials Science and Engineering

Harbin Institute of Technology

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

2 Scopus citations

Abstract

In view of the high porosity susceptibility in laser welded Ti₂AlNb/TC4 dissimilar alloy, different beam displacements are applied in laser welding of Ti-22Al-27Nb and Ti-6Al-4V alloy. The results show that porosity can be successfully suppressed when laser beam acts on Ti-22Al-27Nb alloy. The fusion zones consist of B2 and B2+ α' when the beam acts on Ti-22Al-27N band Ti-6Al-4V alloy, respectively. The heat affected zone (HAZ) of Ti-22Al-27Nb is entirely composed of B2. A mixture of acicular α' and primary α are formed in the HAZ of Ti- 6Al-4V alloy. Due to the second phase strengthening of acicular α' in the fusion zone when laser acts on Ti-6Al- 4V alloy, the welded joint exhibits higher tensile strength and ductility compared with those produced when the beam acts on Ti-22Al-27Nb alloy or at the middle of two base metals.

Original language	English
Article number	1203008
Journal	Zhongguo Jiguang/Chinese Journal of Lasers
Volume	42
Issue number	12
DOIs	https://doi.org/10.3788/CJL201542.1203008
State	Published - 10 Dec 2015

Keywords

Beam displacement
Laser technique
Laser welding
Microstructure
TC4 alloy
Tensile properties
TiAlNb alloy

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10.3788/CJL201542.1203008

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@article{79b6a02ed871400fa83a4a8dccf0ca18,

title = "Effect of laser beam displacement on characteristics of laser welded Ti2AlNb/TC4 dissimilar alloy",

abstract = "In view of the high porosity susceptibility in laser welded Ti2AlNb/TC4 dissimilar alloy, different beam displacements are applied in laser welding of Ti-22Al-27Nb and Ti-6Al-4V alloy. The results show that porosity can be successfully suppressed when laser beam acts on Ti-22Al-27Nb alloy. The fusion zones consist of B2 and B2+ α' when the beam acts on Ti-22Al-27N band Ti-6Al-4V alloy, respectively. The heat affected zone (HAZ) of Ti-22Al-27Nb is entirely composed of B2. A mixture of acicular α' and primary α are formed in the HAZ of Ti- 6Al-4V alloy. Due to the second phase strengthening of acicular α' in the fusion zone when laser acts on Ti-6Al- 4V alloy, the welded joint exhibits higher tensile strength and ductility compared with those produced when the beam acts on Ti-22Al-27Nb alloy or at the middle of two base metals.",

keywords = "Beam displacement, Laser technique, Laser welding, Microstructure, TC4 alloy, Tensile properties, TiAlNb alloy",

author = "Zhenglong Lei and Ming Liu and Kezhao Zhang and Yanbin Chen",

year = "2015",

month = dec,

day = "10",

doi = "10.3788/CJL201542.1203008",

language = "英语",

volume = "42",

journal = "Zhongguo Jiguang/Chinese Journal of Lasers",

issn = "0258-7025",

publisher = "Chinese Laser Press",

number = "12",

}

TY - JOUR

T1 - Effect of laser beam displacement on characteristics of laser welded Ti2AlNb/TC4 dissimilar alloy

AU - Lei, Zhenglong

AU - Liu, Ming

AU - Zhang, Kezhao

AU - Chen, Yanbin

PY - 2015/12/10

Y1 - 2015/12/10

N2 - In view of the high porosity susceptibility in laser welded Ti2AlNb/TC4 dissimilar alloy, different beam displacements are applied in laser welding of Ti-22Al-27Nb and Ti-6Al-4V alloy. The results show that porosity can be successfully suppressed when laser beam acts on Ti-22Al-27Nb alloy. The fusion zones consist of B2 and B2+ α' when the beam acts on Ti-22Al-27N band Ti-6Al-4V alloy, respectively. The heat affected zone (HAZ) of Ti-22Al-27Nb is entirely composed of B2. A mixture of acicular α' and primary α are formed in the HAZ of Ti- 6Al-4V alloy. Due to the second phase strengthening of acicular α' in the fusion zone when laser acts on Ti-6Al- 4V alloy, the welded joint exhibits higher tensile strength and ductility compared with those produced when the beam acts on Ti-22Al-27Nb alloy or at the middle of two base metals.

AB - In view of the high porosity susceptibility in laser welded Ti2AlNb/TC4 dissimilar alloy, different beam displacements are applied in laser welding of Ti-22Al-27Nb and Ti-6Al-4V alloy. The results show that porosity can be successfully suppressed when laser beam acts on Ti-22Al-27Nb alloy. The fusion zones consist of B2 and B2+ α' when the beam acts on Ti-22Al-27N band Ti-6Al-4V alloy, respectively. The heat affected zone (HAZ) of Ti-22Al-27Nb is entirely composed of B2. A mixture of acicular α' and primary α are formed in the HAZ of Ti- 6Al-4V alloy. Due to the second phase strengthening of acicular α' in the fusion zone when laser acts on Ti-6Al- 4V alloy, the welded joint exhibits higher tensile strength and ductility compared with those produced when the beam acts on Ti-22Al-27Nb alloy or at the middle of two base metals.

KW - Beam displacement

KW - Laser technique

KW - Laser welding

KW - Microstructure

KW - TC4 alloy

KW - Tensile properties

KW - TiAlNb alloy

UR - https://www.scopus.com/pages/publications/84956992241

U2 - 10.3788/CJL201542.1203008

DO - 10.3788/CJL201542.1203008

M3 - 文章

AN - SCOPUS:84956992241

SN - 0258-7025

VL - 42

JO - Zhongguo Jiguang/Chinese Journal of Lasers

JF - Zhongguo Jiguang/Chinese Journal of Lasers

IS - 12

M1 - 1203008

ER -

Effect of laser beam displacement on characteristics of laser welded Ti₂AlNb/TC4 dissimilar alloy

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