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)