Work

The Influence of Laser Shock Peening on the Microstructure and Mechanical Properties of AH32 Steel

Year: 2025

Type: article

Abstract: The mechanical integrity of shipbuilding steel under demanding maritime service conditions is a pivotal factor for ensuring the structural safety and operational longevity of vessels. This research employs laser shock peening (LSP) to augment the surface performance of AH32 steel and carries out a comprehensive analysis of the influence and underlying mechanisms of LSP on both the microstructural evolution and mechanical properties of the material. The results indicate that the LSP treatment successfully introduced a high magnitude residual compressive stress (-162 MPa) at the surface of AH32 steel. Additionally, the surface hardness of LSP-1 and LSP-2 increased by 7.3% and 14.7%, respectively. The tensile test results indicate that Sample LSP-2 achieved a 25.8% improvement in elongation while exhibiting only a 5.9% reduction in ultimate tensile strength. Friction and wear tests demonstrated that the average coefficient of friction for the samples treated with LSP decreased by approximately 18%, while the wear rate reduced significantly by over 40%.

Source: Materials

DOI: 10.3390/ma18204679

Authors: Xu Pei, Yiming Shen, Zhaomei Xu, Pengfei Li, Yuchun Peng

Institutions: Huai'an University, Jiangsu University, Wenzhou Vocational College of Science and Technology

Language: English

Topic: Surface Treatment and Residual Stress

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,137

Funder: National Natural Science Foundation of China