研究目的
Investigating the fabrication of micro-dimple arrays on 316L stainless steel using laser peen texturing (LPT) to reduce friction coefficient and improve wear resistance of frictional pairs.
研究成果
LPT is capable of generating dimple array on 316L stainless steel with good repeatability. The dimple depths calculated by simulation show good agreement with those measured in LPT experiments. Residual compressive stress exists in the specimen, which is helpful for improving fatigue performance and increasing the service life of friction pairs.
研究不足
The study focuses on 316L stainless steel and the effects of laser pulse energy on dimple depth. The applicability to other materials and the long-term effects of LPT on tribological performance are not explored.
1：Experimental Design and Method Selection:
Laser peen texturing (LPT) based on laser shock process is proposed to fabricate dimple array on 316L stainless steel.
2：Sample Selection and Data Sources:
Samples of 316L stainless steel were cut into square-shape pieces with the dimensions of 50mm×50mm×2mm.
3：List of Experimental Equipment and Materials:
A Q-switched Nd: YAG laser, reflecting mirrors, a lens, black insulation tapes, and flowing water as the transparent overlay.
4：Experimental Procedures and Operational Workflow:
Laser beam is directed to the sample by reflecting mirrors and focused to a required diameter. The sample is coated with black insulation tapes and flowing water is used as the transparent overlay.
5：Data Analysis Methods:
Numerical simulation based on finite element method is conducted to study the process of LPT.
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