Experimental and Numerical Investigation of Surface Texturing 316L Stainless Steel by Laser Shock Processing

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Li, Kangmei^1 ; Cai, Yu^1 ; Hu, Jun^1

College of Mechanical Engineering, Donghua University, 2999 North Renmin Road, Shanghai

201620, China^1

关键词: 316 L stainless steel;    Friction coefficients;    Frictional pairs;    Geometrical characteristics;    Laser shock processing;    Numerical investigations;    Residual compressive stress;    Surface-texturing;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/2/022042/pdf
DOI  :  10.1088/1755-1315/252/2/022042

来源: IOP

【 摘 要 】

Surface texturing is considered as a promising method to reduce friction coefficient and improve wear resistance of frictional pairs. In this study, laser peen texturing (LPT) based on laser shock process is proposed to fabricate dimple array on 316L stainless steel. LTP experiments are carried out to investigate the geometrical characteristics of the micro-dimple. It is shown that LPT is capable of fabricating micro-dimples with good repeatability. Numerical simulation based on finite element method is conducted to further study the process of LPT. It is found that the dimple depth obtained from numerical simulation shows a good agreement with that measured from experiments. Moreover, by means of stress analysis, it is shown that residual compressive stress exists in the specimen, which is supposed to be helpful to improve the triboligical performance of frictional pairs.