Mechanical properties and electrical conductivity of cold rolled Al-7.5wt%Y alloy with heterogeneous lamella structure and stacking faults

•An Al-7.5wt%Y alloy with heterogeneous lamella structure and Al stacking faults was fabricated via cold rolling.•The Al-Y alloy shows a simultaneous increase in strength and electrical conductivity after rolling.•The as-rolled Al-Y specimen has higher strain hardening rate than the pure Al counterp...

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Bibliographic Details
Published in:Journal of alloys and compounds 2021-11, Vol.882, p.160692, Article 160692
Main Authors: Wang, Mengmeng, Zhou, Yang, Lv, Haiyang, Li, Min, Gao, Haiyan, Wang, Jun, Sun, Baode
Format: Article
Language:English
Subjects:
Al composites
Alloys
Aluminum base alloys
Cold rolling
Conductors
Deformation
Ductility
Electrical conductivity
Electrical resistivity
Elongation
Lamella
Lamellar structure
Mechanical properties
Stacking faults
Strength
Synchrotron X-ray
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Summary:•An Al-7.5wt%Y alloy with heterogeneous lamella structure and Al stacking faults was fabricated via cold rolling.•The Al-Y alloy shows a simultaneous increase in strength and electrical conductivity after rolling.•The as-rolled Al-Y specimen has higher strain hardening rate than the pure Al counterpart.•The deformation behavior, strengthening mechanism and conductive mechanism of the as-rolled alloy were elucidated. [Display omitted] Strength, ductility, and electrical conductivity are always mutually exclusive to each other in conductor materials. Although numerous strategies were proposed, aiming at breaking the dilemmas between strength and ductility, or strength and conductivity, a better solution to solve them all is still a thirst for Al alloys. In this paper, we produced an Al-7.5Y alloy with heterogeneous lamella structure and stacking faults (SF) via cold rolling. The results indicate that the as-rolled Al-Y specimen shows a simultaneous increase in strength and electrical conductivity compared to that of the as-cast counterpart. Interestingly, the as-rolled Al-Y specimen has nearly the same uniform elongation as the pure Al counterpart. The deformation behavior, strengthening mechanism as well as the conductive mechanism of the as-rolled Al-Y alloy were revealed by electron microscopy and in-situ X-ray diffraction. The authors confirm that the data supporting the findings of this study are available within the article.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2021.160692