Evolution of microstructure and mechanical properties of aluminum alloy induced by turning and ultrasonic surface rolling process

authored by

Hongtao Chen, Shuyao Liu, Pai Wang, Xin Jin, Xuezhi Li, Xibin Wang, Zhibing Liu, Fadi Aldakheel

Abstract

The microstructure and mechanical properties have a significant impact on the service performance of materials. This paper compared the microstructure and mechanical properties of 2024 aluminum alloy subjected to turning and ultrasonic surface rolling process (USRP). It was found that both turning and USRP can cause grain refinement and increased microhardness. The grain refinement induced by USRP was attributed to dislocation proliferation and T-phase fragmentation; At the same time, a quantitative relationship model between microhardness and microstructure during turning and USRP was constructed. The results showed that precipitation had the greatest impact on the microhardness induced by turning, while dislocations and grain refinement had the greatest impact on the microhardness induced by USRP; In addition, the mechanical performance response mechanism of the materials after turning and USRP was elucidated, and it was found that USRP can significantly enhance the yield strength of the materials.

Organisation(s)

Institute of Mechanics and Computational Mechanics

External Organisation(s)

Beijing Institute of Technology

Type

Article

Journal

Journal of Materials Research and Technology

Volume

30

Pages

6836-6848

No. of pages

13

ISSN

2238-7854

Publication date

05.2024

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Ceramics and Composites, Biomaterials, Surfaces, Coatings and Films, Metals and Alloys

Electronic version(s)

https://doi.org/10.1016/j.jmrt.2024.05.091 (Access: Open)