Superior wear resistance in a TaMoNb compositionally complex alloy film via in-situ formation of the amorphous-crystalline nanocomposite layer and gradient nanostructure

Luo，Jiasi1,2; Sun，Wanting2; Liang，Dingshan1; Chan，K. C.2; Yang，Xu Sheng2; Ren，Fuzeng1

2023-01-15

10.1016/j.actamat.2022.118503

ACTA MATERIALIA   Impact Factor & Quartile

1359-6454

1873-2453

Metallic alloys with exceptional wear resistance have long been an attractive prospect for their enhanced safety, reliability, and service duration. Herein, we propose a strategy to achieve superior wear resistance via the in-situ formation of an amorphous-crystalline nanocomposite layer and gradient nanostructure during wear at elevated temperatures. This strategy was demonstrated in a compositionally complex alloy TaMoNb film with a columnar grain structure upon sliding wear at 300 °C. In contrast to the surface layer formed at room temperature (RT), which consists of irregularly shaped TaMoNb nanograins with non-uniform size and distribution in the amorphous oxide matrix, a dense 300 nm-thick nanocomposite layer comprising equiaxed nanograins of only ∼6 nm embedded in the amorphous oxide matrix is formed during wear at 300 °C, below which is a 600 nm-thick plastic-deformation region that exhibits gradient nanostructure. The microstructure induced by wear at 400 °C shows the presence of a 30 nm-thick amorphous layer below the nanocomposite surface layer but no appreciable plastic deformation in the base film. Consequently, the TaMoNb film exhibits a remarkably low wear rate upon wear at 300 °C that is less than 25% of those at RT and 400 °C. Such superior wear resistance is attributed to the specific wear-induced microstructure generated at 300 °C, which has high strength and large homogeneous deformation. Thus, this work offers a new strategy for designing self-adaptive wear-resistant alloys for application in extreme thermo-mechanical service environments.

Gradient nanostructure Mechanical properties Nanocomposite Thin film Wear

SCI

English

First

Basic and Applied Basic Research Foundation of Guangdong Province[2022A1515011322];National Natural Science Foundation of China[52122102];Shenzhen Fundamental Research Program[JCYJ20190809115211227];

Materials Science ; Metallurgy & Metallurgical Engineering

Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000900016800001

PERGAMON-ELSEVIER SCIENCE LTD

MATERIALS SCIENCE

2-s2.0-85142180554

Scopus

1.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
2.Department of Industrial and Systems Engineering,Research Institute for Advanced Manufacturing,the Hong Kong Polytechnic University,Kowloon,Hung Hom,Hong Kong

Luo，Jiasi,Sun，Wanting,Liang，Dingshan,et al. Superior wear resistance in a TaMoNb compositionally complex alloy film via in-situ formation of the amorphous-crystalline nanocomposite layer and gradient nanostructure[J]. ACTA MATERIALIA,2023,243.

Luo，Jiasi,Sun，Wanting,Liang，Dingshan,Chan，K. C.,Yang，Xu Sheng,&Ren，Fuzeng.(2023).Superior wear resistance in a TaMoNb compositionally complex alloy film via in-situ formation of the amorphous-crystalline nanocomposite layer and gradient nanostructure.ACTA MATERIALIA,243.

Luo，Jiasi,et al."Superior wear resistance in a TaMoNb compositionally complex alloy film via in-situ formation of the amorphous-crystalline nanocomposite layer and gradient nanostructure".ACTA MATERIALIA 243(2023).