Characterization of microstructure and wear resistance of a monotectic Al-Bi-Zn alloy

Author(s)

Reyes, V, Rodrigo ; Casteletti, Luiz C. ^[1] ; Garcia, Amauri ^[2] ; Spinelli, Jose E. ^[3]

Affiliation

^[1] Univ Sao Paulo, Dept Mat Engn, BR-13563120 Sao Carlos, SP - Brazil

^[2] Univ Estadual Campinas, Dept Mfg & Mat Engn, UNICAMP, BR-13083860 Campinas, SP - Brazil

^[3] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS; v. 147, DEC 2020.
• Web of Science Citations: 0

Abstract

The development of multicomponent Al-Bi alloys is an alternative approach to control either separation or morphology of the phases forming their microstructures. Furthermore, addition of alloying elements in Al-Bi alloys has been settled to pursue an optimized combination of wear resistance and mechanical strength. In the present investigation, solidification conditions are deduced from temperature measurements and the microstructure is thoroughly characterized. The results highlight the impact of the solidification conditions on the Bi distribution and macrosegregation. A relation is established between Bi-droplet spacing and wear resistance and a comparison with previous experiments on Al-Bi-Cu alloys is outlined. It is found that both Bi segregation and spacing between globules of Bi control the wear resistance of the Zn-containing alloy. Despite the similarities of Bi spacings if Cu- and Zn-containing alloys are compared, the wear resistance of the Cu-containing alloy is higher. (AU)

• FAPESP's process: 17/12741-6 - Application of experimental solidification techniques, characterization of microstructure and properties in the evaluation of eutectic and hypereutectic Al-base and Zn-base alloys
• Grantee: José Eduardo Spinelli
• Support Opportunities: Regular Research Grants