Sample geometry and size effects on tensile properties of friction stir welded AA2024 joints

Zhihan Zhang; Wenya Li; Feifan Wang; Jinglong Li

doi:10.1016/j.matlet.2015.09.122

Sample geometry and size effects on tensile properties of friction stir welded AA2024 joints

Zhihan Zhang, Wenya Li, Feifan Wang, Jinglong Li

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

31 Scopus citations

Abstract

Dog-bone specimens with different geometries and sizes are commonly used to characterize the tensile behavior of friction stir welded (FSWed) joints. Here a significant effect of sample geometry/size on the tensile behavior of FSWed AA2024 joints was observed, caused by various ratios of weld width to gauge length of samples. The elongation drops sharply while the yield stress gradually increases with increasing the gage length from 12.5 to 25 mm. The ultimate tensile strength is independent on the sample geometry/size. A critical gauge length of about 2.5 times of tool shoulder diameter is proposed, e.g. 25 mm in this study for AA2024, which roughly equals to the transverse width across all the softened zones in the joint. Over this critical value there will be no sample geometry/size effect on the tensile properties of FSW joints.

Original language	English
Pages (from-to)	94-96
Number of pages	3
Journal	Materials Letters
Volume	162
DOIs	https://doi.org/10.1016/j.matlet.2015.09.122
State	Published - 1 Jan 2016

Keywords

Metals and alloys
Sample size effect
Tensile property
Welding

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10.1016/j.matlet.2015.09.122

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title = "Sample geometry and size effects on tensile properties of friction stir welded AA2024 joints",

abstract = "Dog-bone specimens with different geometries and sizes are commonly used to characterize the tensile behavior of friction stir welded (FSWed) joints. Here a significant effect of sample geometry/size on the tensile behavior of FSWed AA2024 joints was observed, caused by various ratios of weld width to gauge length of samples. The elongation drops sharply while the yield stress gradually increases with increasing the gage length from 12.5 to 25 mm. The ultimate tensile strength is independent on the sample geometry/size. A critical gauge length of about 2.5 times of tool shoulder diameter is proposed, e.g. 25 mm in this study for AA2024, which roughly equals to the transverse width across all the softened zones in the joint. Over this critical value there will be no sample geometry/size effect on the tensile properties of FSW joints.",

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author = "Zhihan Zhang and Wenya Li and Feifan Wang and Jinglong Li",

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T1 - Sample geometry and size effects on tensile properties of friction stir welded AA2024 joints

AU - Zhang, Zhihan

AU - Li, Wenya

AU - Wang, Feifan

AU - Li, Jinglong

PY - 2016/1/1

Y1 - 2016/1/1

N2 - Dog-bone specimens with different geometries and sizes are commonly used to characterize the tensile behavior of friction stir welded (FSWed) joints. Here a significant effect of sample geometry/size on the tensile behavior of FSWed AA2024 joints was observed, caused by various ratios of weld width to gauge length of samples. The elongation drops sharply while the yield stress gradually increases with increasing the gage length from 12.5 to 25 mm. The ultimate tensile strength is independent on the sample geometry/size. A critical gauge length of about 2.5 times of tool shoulder diameter is proposed, e.g. 25 mm in this study for AA2024, which roughly equals to the transverse width across all the softened zones in the joint. Over this critical value there will be no sample geometry/size effect on the tensile properties of FSW joints.

AB - Dog-bone specimens with different geometries and sizes are commonly used to characterize the tensile behavior of friction stir welded (FSWed) joints. Here a significant effect of sample geometry/size on the tensile behavior of FSWed AA2024 joints was observed, caused by various ratios of weld width to gauge length of samples. The elongation drops sharply while the yield stress gradually increases with increasing the gage length from 12.5 to 25 mm. The ultimate tensile strength is independent on the sample geometry/size. A critical gauge length of about 2.5 times of tool shoulder diameter is proposed, e.g. 25 mm in this study for AA2024, which roughly equals to the transverse width across all the softened zones in the joint. Over this critical value there will be no sample geometry/size effect on the tensile properties of FSW joints.

KW - Metals and alloys

KW - Sample size effect

KW - Tensile property

KW - Welding

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JO - Materials Letters

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Sample geometry and size effects on tensile properties of friction stir welded AA2024 joints

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Keywords

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