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Indexed by:Journal Papers

Date of Publication:2020-03-01

Journal:JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY

Included Journals:EI、SCIE

Volume:40

Page Number:158-167

ISSN No.:1005-0302

Key Words:Second-phase particles; Netty shape; Rodlike shape; Stick-slip; Mechanical property; Self-lubricating property

Abstract:The Cu-24Pb-xSn (wt%) (x = 0, 2, 4, 6) alloys with Pb-rich second-phase particles (SPPs) in different shapes show obviously differently mechanical and self-lubricating properties. The influence of the SPPs' shape difference on the alloys' mechanical and self-lubricating properties was revealed. Cu-24Pb alloy with continuously netty SPPs shows much more intensive stick-slip phenomenon during dry sliding than the other three alloys with independently rodlike SPPs. That is mainly due to insufficient lubrication resulted by the netty SPPs' splitting matrix. With the SPPs transforming from netty to rodlike shape under the addition of Sn, the stick-slip phenomenon was notably weakened, which was proven to be related to the higher self-lubricating property of alloys with rodlike SPPs. Simultaneously, the simultaneous increase of ductility and tensile strength was observed in the Cu-24Pb-xSn alloys with increasing Sn content, which is because the netty SPPs' splitting behavior will be weakened with them replaced by the rodlike SPPs. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.