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

School of Materials Sience and Engineering

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

34 Scopus citations

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 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.

Original language	English
Pages (from-to)	68-71
Number of pages	4
Journal	Materials Letters
Volume	231
DOIs	https://doi.org/10.1016/j.matlet.2018.08.009
State	Published - 15 Nov 2018

Keywords

Aluminum alloys
Dissimilar joint
Friction stir welding
Strain hardening

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10.1016/j.matlet.2018.08.009

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title = "Strain hardening behavior and mechanisms of friction stir welded dissimilar joints of aluminum alloys",

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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doi = "10.1016/j.matlet.2018.08.009",

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T1 - Strain hardening behavior and mechanisms of friction stir welded dissimilar joints of aluminum alloys

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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U2 - 10.1016/j.matlet.2018.08.009

DO - 10.1016/j.matlet.2018.08.009

M3 - 文章

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VL - 231

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JO - Materials Letters

JF - Materials Letters

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

Abstract

Keywords

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