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

10.1007/s11661-019-05243-8

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE   影响因子和分区

1073-5623

1543-1940

Although 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 degrees C. The alloy had a heterogeneous microstructure consisting of coarse-grained Cu (average grain size: 1.5 mu m) 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 degrees 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 degrees 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 degrees C.

SCI ; EI

英语

第一 ; 通讯

Fundamental Research Program of Shenzhen[JCYJ20170412153039309] ; Fundamental Research Program of Shenzhen[JCYJ20170307110418960]

Materials Science ; Metallurgy & Metallurgical Engineering

Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000469795200015

SPRINGER

20192006919807

Adhesives ; Ball milling ; Binary alloys ; Chromium compounds ; Compressive strength ; Copper alloys ; Copper oxides ; Friction ; Grain size and shape ; High strength alloys ; Nanocrystalline alloys ; Nanocrystals ; Plastic deformation ; Precipitation (chemical) ; Spark plasma sintering ; Textures ; Wear of materials ; Wear resistance

Metallurgy:531.1 ; Chromium and Alloys:543.1 ; Copper Alloys:544.2 ; Nanotechnology:761 ; Chemical Operations:802.3 ; Inorganic Compounds:804.2 ; Physical Properties of Gases, Liquids and Solids:931.2

MATERIALS SCIENCE

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen, Heilongjiang, Peoples R China
2.Harbin Inst Technol, Sch Mat Sci & Engn, Harbin, Heilongjiang, Peoples R China
3.Univ Macau, Fac Sci & Technol, Inst Appl Phys & Mat Engn, Macau, Peoples R China
4.Soochow Univ, Shagang Sch Iron & Steel, Suzhou, Peoples R China

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,2019,50A(7):3132-3147.

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,50A(7),3132-3147.

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 50A.7(2019):3132-3147.