Strain hardening behavior and mechanisms of friction stir welded dissimilar joints of aluminum alloys

P. L. Niu; W. Y. Li; D. L. Chen

doi:10.1016/j.matlet.2018.08.009

Strain hardening behavior and mechanisms of friction stir welded dissimilar joints of aluminum alloys

P. L. Niu, W. Y. Li, D. L. Chen

材料学院

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34 引用（Scopus）

摘要

Al-Cu alloy was friction stir welded (FSWed) with Al-Zn and Al-Mg alloys, respectively. Tensile properties, strain hardening behavior and fracture mechanisms of the FSWed dissimilar joints were evaluated. Results reveal that the strain-hardening rate of Al-Cu/Al-Zn dissimilar joint is higher than that of base metals due to the presence of finer recrystallized grains in the stir zone, while the strain-hardening rate of Al-Cu/Al-Mg dissimilar joint lies in-between those of base metals. The hardening level of Al-Cu/Al-Zn joint after tensile deformation, defined as HV_f/HV_w (a ratio of microhardness of fractured joints to that of as-welded joints), exhibits an ‘M’ shape across the welded joint.

源语言	英语
页（从-至）	68-71
页数	4
期刊	Materials Letters
卷	231
DOI	https://doi.org/10.1016/j.matlet.2018.08.009
出版状态	已出版 - 15 11月 2018

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10.1016/j.matlet.2018.08.009

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abstract = "Al-Cu alloy was friction stir welded (FSWed) with Al-Zn and Al-Mg alloys, respectively. Tensile properties, strain hardening behavior and fracture mechanisms of the FSWed dissimilar joints were evaluated. Results reveal that the strain-hardening rate of Al-Cu/Al-Zn dissimilar joint is higher than that of base metals due to the presence of finer recrystallized grains in the stir zone, while the strain-hardening rate of Al-Cu/Al-Mg dissimilar joint lies in-between those of base metals. The hardening level of Al-Cu/Al-Zn joint after tensile deformation, defined as HVf/HVw (a ratio of microhardness of fractured joints to that of as-welded joints), exhibits an {\textquoteleft}M{\textquoteright} shape across the welded joint.",

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AU - Niu, P. L.

AU - Li, W. Y.

AU - Chen, D. L.

PY - 2018/11/15

Y1 - 2018/11/15

N2 - Al-Cu alloy was friction stir welded (FSWed) with Al-Zn and Al-Mg alloys, respectively. Tensile properties, strain hardening behavior and fracture mechanisms of the FSWed dissimilar joints were evaluated. Results reveal that the strain-hardening rate of Al-Cu/Al-Zn dissimilar joint is higher than that of base metals due to the presence of finer recrystallized grains in the stir zone, while the strain-hardening rate of Al-Cu/Al-Mg dissimilar joint lies in-between those of base metals. The hardening level of Al-Cu/Al-Zn joint after tensile deformation, defined as HVf/HVw (a ratio of microhardness of fractured joints to that of as-welded joints), exhibits an ‘M’ shape across the welded joint.

AB - Al-Cu alloy was friction stir welded (FSWed) with Al-Zn and Al-Mg alloys, respectively. Tensile properties, strain hardening behavior and fracture mechanisms of the FSWed dissimilar joints were evaluated. Results reveal that the strain-hardening rate of Al-Cu/Al-Zn dissimilar joint is higher than that of base metals due to the presence of finer recrystallized grains in the stir zone, while the strain-hardening rate of Al-Cu/Al-Mg dissimilar joint lies in-between those of base metals. The hardening level of Al-Cu/Al-Zn joint after tensile deformation, defined as HVf/HVw (a ratio of microhardness of fractured joints to that of as-welded joints), exhibits an ‘M’ shape across the welded joint.

KW - Aluminum alloys

KW - Dissimilar joint

KW - Friction stir welding

KW - Strain hardening

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DO - 10.1016/j.matlet.2018.08.009

M3 - 文章

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VL - 231

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EP - 71

JO - Materials Letters

JF - Materials Letters

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Strain hardening behavior and mechanisms of friction stir welded dissimilar joints of aluminum alloys

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