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Sliding Wear Behavior of Spark Plasma-Sintered Cu–6 Wt Pct Cr Alloy at Room and Elevated Temperatures
Pan, Shuai1,2; Zhao, Cancan1; Zhu, Weiwei1,3; Jiang, Feilong1,2; Zhou, Jian4; Ren, Fuzeng1
2019-07-15
Source PublicationMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
ISSN1073-5623
Volume50Issue:7Pages:3132-3147
AbstractAlthough dilute Cu-Cr alloys are frequently used for applications involving sliding contacts, their wear mechanism at elevated temperatures has rarely been explored. We fabricated a bulk Cu-6 wt pct Cr alloy using high-energy ball milling and spark plasma sintering, and systematically investigated its dry sliding wear behavior against 440C stainless steel at room temperature and 300 °C. The alloy had a heterogeneous microstructure consisting of coarse-grained Cu (average grain size: 1.5 µm) distributed into a nanocrystalline Cu-Cr matrix (average Cu grain size: 77 nm; Cr-rich precipitate size: 18 nm), which gave high strength and plasticity (ultimate compressive strength: 1020 MPa; strain-to-failure: 26.0 pct) at room temperature. At 300 °C, the strength was significantly reduced, the coefficient of friction and wear rate increased, and the dominant wear mode switched from adhesive wear to oxidative/abrasive wear. Uniformly distributed nanoscale Cr-rich and Cr oxide precipitates hindered severe plastic deformation near the sliding surface during wear at room temperature; at 300 °C, severe plastic deformation was observed, with elongated Cu grains and uniformly dispersed Cr-rich and Cr oxide nanoparticles. Formation of a discontinuous glaze layer consisting of equiaxed nanograins of Cu, Cu oxides, and Cr oxides resulted in severe abrasion-assisted wear, and reduced the wear resistance at 300 °C.
DOI10.1007/s11661-019-05243-8
URLView the original
Language英語English
Scopus ID2-s2.0-85065471056
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Cited Times [WOS]:2   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, China
2.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, China
3.Institute of Applied Physics and Materials Engineering, Faculty of Science and Technology, University of Macau, Macao
4.Shagang School of Iron and Steel, Soochow University, Suzhou, China
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GB/T 7714
Pan, Shuai,Zhao, Cancan,Zhu, Weiwei,et al. Sliding Wear Behavior of Spark Plasma-Sintered Cu–6 Wt Pct Cr Alloy at Room and Elevated Temperatures[J]. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science,2019,50(7):3132-3147.
APA Pan, Shuai,Zhao, Cancan,Zhu, Weiwei,Jiang, Feilong,Zhou, Jian,&Ren, Fuzeng.(2019).Sliding Wear Behavior of Spark Plasma-Sintered Cu–6 Wt Pct Cr Alloy at Room and Elevated Temperatures.Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science,50(7),3132-3147.
MLA Pan, Shuai,et al."Sliding Wear Behavior of Spark Plasma-Sintered Cu–6 Wt Pct Cr Alloy at Room and Elevated Temperatures".Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 50.7(2019):3132-3147.
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