Work

Mechanical property enhancement of Tip/VW94 composites via the construction of gradient ultrafine-grained structures

Year: 2025

Type: article

Abstract: A gradient ultrafine-grained structure was successfully fabricated on the surface of 3.5 wt.% Tip/VW94 composites by sliding friction treatment (SFT), and the microstructure and mechanical properties of the material were investigated. The results show that due to the gradient strain, a gradient deformation layer with a thickness of about 400 μm is formed on the material's surface. The grain size of the surface layer is refined to 87 nm as a result of severe plastic deformation. During the SFT process, numerous dislocations are activated, and many twins form, facilitating coordinated deformation and promoting grain refinement. Additionally, the strength of the gradient-structured composites is increased without significant loss of plasticity compared to the initial state. The presence of Ti particles leads to the formation of a strain misfit field, which hinders dislocation migration and provides energy for twin nucleation, inducing numerous dislocations and twin boundary strengthening.

Source: Journal of Materials Research and Technology

DOI: 10.1016/j.jmrt.2025.04.140

Authors: Qifeng Li, Xianhua Chen, Yi Ding, Chunquan Liu, Jia She, Fusheng Pan

Institutions: Chongqing University, Guizhou University

Language: English

Topic: Microstructure and mechanical properties

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,640