Journal
MATERIALS LETTERS
Volume 231, Issue -, Pages 68-71Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2018.08.009
Keywords
Friction stir welding; Dissimilar joint; Aluminum alloys; Strain hardening
Funding
- National Natural Science Foundation of China [51574196]
- Natural Sciences and Engineering Research Council of Canada (NSERC)
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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. (C) 2018 Elsevier B.V. All rights reserved.
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