Effect of welding parameters on mechanical and fatigue properties of friction stir welded 2198 T8 aluminum–lithium alloy joints

Yu E. Ma; Z. C. Xia; R. R. Jiang; Wen Ya Li

doi:10.1016/j.engfracmech.2013.10.010

Effect of welding parameters on mechanical and fatigue properties of friction stir welded 2198 T8 aluminum–lithium alloy joints

Yu E. Ma, Z. C. Xia, R. R. Jiang, Wen Ya Li

Northwestern Polytechnical University Xian

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

73 Scopus citations

Abstract

The main friction stir welding parameters include the rotation speed (ω) and the welding speed (v). 2198 T8 welded samples were designed to investigate effects of the ratio ω/v on the microstructure, the microhardness and tensile properties of welds. Fatigue tests were performed under three different R ratios, and crack growth rates were compared. The fractographic analysis was performed by SEM to analyze the fracture mechanism. It is shown that microhardness and tensile strength of the joints through the weld decrease with increasing ω/v. The fracture pattern has a tendency to change from the brittle fracture to the ductile fracture.

Original language	English
Pages (from-to)	1-11
Number of pages	11
Journal	Engineering Fracture Mechanics
Volume	114
DOIs	https://doi.org/10.1016/j.engfracmech.2013.10.010
State	Published - 1 Dec 2013

Keywords

Aluminum–lithium alloy
Fatigue property
Friction stir welding
Mechanical property
Welding parameters

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10.1016/j.engfracmech.2013.10.010

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title = "Effect of welding parameters on mechanical and fatigue properties of friction stir welded 2198 T8 aluminum–lithium alloy joints",

abstract = "The main friction stir welding parameters include the rotation speed (ω) and the welding speed (v). 2198 T8 welded samples were designed to investigate effects of the ratio ω/v on the microstructure, the microhardness and tensile properties of welds. Fatigue tests were performed under three different R ratios, and crack growth rates were compared. The fractographic analysis was performed by SEM to analyze the fracture mechanism. It is shown that microhardness and tensile strength of the joints through the weld decrease with increasing ω/v. The fracture pattern has a tendency to change from the brittle fracture to the ductile fracture.",

keywords = "Aluminum–lithium alloy, Fatigue property, Friction stir welding, Mechanical property, Welding parameters",

author = "Ma, {Yu E.} and Xia, {Z. C.} and Jiang, {R. R.} and Li, {Wen Ya}",

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T1 - Effect of welding parameters on mechanical and fatigue properties of friction stir welded 2198 T8 aluminum–lithium alloy joints

AU - Ma, Yu E.

AU - Xia, Z. C.

AU - Jiang, R. R.

AU - Li, Wen Ya

PY - 2013/12/1

Y1 - 2013/12/1

N2 - The main friction stir welding parameters include the rotation speed (ω) and the welding speed (v). 2198 T8 welded samples were designed to investigate effects of the ratio ω/v on the microstructure, the microhardness and tensile properties of welds. Fatigue tests were performed under three different R ratios, and crack growth rates were compared. The fractographic analysis was performed by SEM to analyze the fracture mechanism. It is shown that microhardness and tensile strength of the joints through the weld decrease with increasing ω/v. The fracture pattern has a tendency to change from the brittle fracture to the ductile fracture.

AB - The main friction stir welding parameters include the rotation speed (ω) and the welding speed (v). 2198 T8 welded samples were designed to investigate effects of the ratio ω/v on the microstructure, the microhardness and tensile properties of welds. Fatigue tests were performed under three different R ratios, and crack growth rates were compared. The fractographic analysis was performed by SEM to analyze the fracture mechanism. It is shown that microhardness and tensile strength of the joints through the weld decrease with increasing ω/v. The fracture pattern has a tendency to change from the brittle fracture to the ductile fracture.

KW - Aluminum–lithium alloy

KW - Fatigue property

KW - Friction stir welding

KW - Mechanical property

KW - Welding parameters

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DO - 10.1016/j.engfracmech.2013.10.010

M3 - 文章

AN - SCOPUS:84887171831

SN - 0013-7944

VL - 114

SP - 1

EP - 11

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

ER -

Effect of welding parameters on mechanical and fatigue properties of friction stir welded 2198 T8 aluminum–lithium alloy joints

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