Effects of annealing on microstructure and properties of linear friction welded dissimilar titanium joints

T. J. Ma; X. Li; B. Zhong; W. Y. Li

doi:10.1179/1362171814Y.0000000243

Effects of annealing on microstructure and properties of linear friction welded dissimilar titanium joints

T. J. Ma, X. Li, B. Zhong, W. Y. Li

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

2 Scopus citations

Abstract

Linear friction welds of Ti–6Al–4V (TC4, according to Chinese classification) to Ti–6·5Al–3·5Mo–1·5Zr–0·3Si (TC11, according to Chinese classification) were subject to post-weld heat treatment (PWHT) at 650°C×4 h (PWHT1) and at 950°C×1 h+530°C×4 h (PWHT2) under air cooling. In the as welded joint, TC4 had recrystallised sufficiently compared to TC11. After PWHT1, the α grains in the TC4 weld centre zone grew to some extent and many superfine equiaxed recrystallised α grains precipitated along β boundaries on the TC11 side. The grain growth along the weld line in the weld centre zone under PWHT2 was evident. PWHT2 reduced the joint tensile strength due to the coarsening of the microstructure. The joint microhardness decreased after PWHT.

Original language	English
Pages (from-to)	689-695
Number of pages	7
Journal	Science and Technology of Welding and Joining
Volume	19
Issue number	8
DOIs	https://doi.org/10.1179/1362171814Y.0000000243
State	Published - 1 Nov 2014

Keywords

Linear friction welding
Mechanical properties
Microstructure
Post-weld heat treatment
Titanium alloys

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10.1179/1362171814Y.0000000243

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@article{0a4c5a1e765045a3822c7ace4a3ce319,

title = "Effects of annealing on microstructure and properties of linear friction welded dissimilar titanium joints",

abstract = "Linear friction welds of Ti–6Al–4V (TC4, according to Chinese classification) to Ti–6·5Al–3·5Mo–1·5Zr–0·3Si (TC11, according to Chinese classification) were subject to post-weld heat treatment (PWHT) at 650°C×4 h (PWHT1) and at 950°C×1 h+530°C×4 h (PWHT2) under air cooling. In the as welded joint, TC4 had recrystallised sufficiently compared to TC11. After PWHT1, the α grains in the TC4 weld centre zone grew to some extent and many superfine equiaxed recrystallised α grains precipitated along β boundaries on the TC11 side. The grain growth along the weld line in the weld centre zone under PWHT2 was evident. PWHT2 reduced the joint tensile strength due to the coarsening of the microstructure. The joint microhardness decreased after PWHT.",

keywords = "Linear friction welding, Mechanical properties, Microstructure, Post-weld heat treatment, Titanium alloys",

author = "Ma, {T. J.} and X. Li and B. Zhong and Li, {W. Y.}",

note = "Publisher Copyright: {\textcopyright} 2014 Institute of Materials, Minerals and Mining.",

year = "2014",

month = nov,

day = "1",

doi = "10.1179/1362171814Y.0000000243",

language = "英语",

volume = "19",

pages = "689--695",

journal = "Science and Technology of Welding and Joining",

issn = "1362-1718",

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TY - JOUR

T1 - Effects of annealing on microstructure and properties of linear friction welded dissimilar titanium joints

AU - Ma, T. J.

AU - Li, X.

AU - Zhong, B.

AU - Li, W. Y.

PY - 2014/11/1

Y1 - 2014/11/1

N2 - Linear friction welds of Ti–6Al–4V (TC4, according to Chinese classification) to Ti–6·5Al–3·5Mo–1·5Zr–0·3Si (TC11, according to Chinese classification) were subject to post-weld heat treatment (PWHT) at 650°C×4 h (PWHT1) and at 950°C×1 h+530°C×4 h (PWHT2) under air cooling. In the as welded joint, TC4 had recrystallised sufficiently compared to TC11. After PWHT1, the α grains in the TC4 weld centre zone grew to some extent and many superfine equiaxed recrystallised α grains precipitated along β boundaries on the TC11 side. The grain growth along the weld line in the weld centre zone under PWHT2 was evident. PWHT2 reduced the joint tensile strength due to the coarsening of the microstructure. The joint microhardness decreased after PWHT.

AB - Linear friction welds of Ti–6Al–4V (TC4, according to Chinese classification) to Ti–6·5Al–3·5Mo–1·5Zr–0·3Si (TC11, according to Chinese classification) were subject to post-weld heat treatment (PWHT) at 650°C×4 h (PWHT1) and at 950°C×1 h+530°C×4 h (PWHT2) under air cooling. In the as welded joint, TC4 had recrystallised sufficiently compared to TC11. After PWHT1, the α grains in the TC4 weld centre zone grew to some extent and many superfine equiaxed recrystallised α grains precipitated along β boundaries on the TC11 side. The grain growth along the weld line in the weld centre zone under PWHT2 was evident. PWHT2 reduced the joint tensile strength due to the coarsening of the microstructure. The joint microhardness decreased after PWHT.

KW - Linear friction welding

KW - Mechanical properties

KW - Microstructure

KW - Post-weld heat treatment

KW - Titanium alloys

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U2 - 10.1179/1362171814Y.0000000243

DO - 10.1179/1362171814Y.0000000243

M3 - 文章

AN - SCOPUS:84919430870

SN - 1362-1718

VL - 19

SP - 689

EP - 695

JO - Science and Technology of Welding and Joining

JF - Science and Technology of Welding and Joining

IS - 8

ER -

Effects of annealing on microstructure and properties of linear friction welded dissimilar titanium joints

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