Achieving low wear in a complex concentrated alloy CrFeNiNb with multi-phase hierarchical microstructure

Liang, Dingshan; Duan, Ranxi; Luo, Jiasi; Yang, Lu; Chu, Kangjie; Ren, Fuzeng

2023-11-01

10.1016/j.compositesb.2023.110995

COMPOSITES PART B-ENGINEERING   影响因子和分区

1359-8368

1879-1069

We propose a strategy to achieve low wear in a complex concentrated alloy (CCA) CrFeNiNb with multi-phase hierarchical microstructure. The CCA comprises a matrix of ultrafine-grained hexagonal close-packed (HCP) Laves phase (80.3 vol%), a secondary face-centered cubic (FCC) phase (18.3 vol%), a minor amount of (Nb,Cr)oxides and a trace amount of uniformly dispersed nanoscale precipitates. The CrFeNiNb CCA exhibits an ultrahigh hardness of 993 (+/- 22) HV and an extremely low wear rate of 7.4 (+/- 0.6) x 10-6 mm3/(N center dot m) when sliding against a silicon nitride (Si3N4) ball. To elucidate the wear mechanism, we characterized the morphology, chemical composition and cross-sectional microstructure of the wear track. The results indicate that the cracked oxide layer, subgrain formation in the FCC phase, and the Shockley partial and full dislocations-triggered intragranular prismatic slip in the C14 Laves phase synergically contribute to the exceptional wear resistance. Furthermore, we conducted a detailed analysis of the chemical composition and crystal structure of the cracked oxide layer, along with a compressive discussion of the subsurface deformation of HCP/FCC phases. These findings offer significant insights into designing wear-resistant alloy through the formation of multi-phase hierarchical microstructure.

Complex concentrated alloys Sliding wear Microstructure

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[52122102] ; Guangdong Basic and Applied Basic Research Foundation[2022B1515120082] ; Basic Research Program of Shenzhen[JCYJ20220530113017040]

Engineering ; Materials Science

Engineering, Multidisciplinary ; Materials Science, Composites

WOS:001079612300001

ELSEVIER SCI LTD

20234014844956

Chromium alloys ; Chromium compounds ; Crystal structure ; Morphology ; Niobium alloys ; Silicon nitride ; Ternary alloys ; Wear of materials ; Wear resistance

Chromium and Alloys:543.1 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Inorganic Compounds:804.2 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Crystal Lattice:933.1.1 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China

Liang, Dingshan,Duan, Ranxi,Luo, Jiasi,et al. Achieving low wear in a complex concentrated alloy CrFeNiNb with multi-phase hierarchical microstructure[J]. COMPOSITES PART B-ENGINEERING,2023,266.

Liang, Dingshan,Duan, Ranxi,Luo, Jiasi,Yang, Lu,Chu, Kangjie,&Ren, Fuzeng.(2023).Achieving low wear in a complex concentrated alloy CrFeNiNb with multi-phase hierarchical microstructure.COMPOSITES PART B-ENGINEERING,266.

Liang, Dingshan,et al."Achieving low wear in a complex concentrated alloy CrFeNiNb with multi-phase hierarchical microstructure".COMPOSITES PART B-ENGINEERING 266(2023).