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

Northwestern Polytechnical University Xian
Toronto Metropolitan University

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

35 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

Cite this

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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.",

keywords = "Aluminum alloys, Dissimilar joint, Friction stir welding, Strain hardening",

author = "Niu, \{P. L.\} and Li, \{W. Y.\} and Chen, \{D. L.\}",

note = "Publisher Copyright: {\textcopyright} 2018",

year = "2018",

month = nov,

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

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TY - JOUR

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

UR - https://www.scopus.com/pages/publications/85051110130

U2 - 10.1016/j.matlet.2018.08.009

DO - 10.1016/j.matlet.2018.08.009

M3 - 文章

AN - SCOPUS:85051110130

SN - 0167-577X

VL - 231

SP - 68

EP - 71

JO - Materials Letters

JF - Materials Letters

ER -

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

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Keywords

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