Year: 2025
Type: article
Abstract: 316L stainless steel was prepared via selective laser melting (SLM), and the effect of heat treatment on microstructure, density, microhardness and wear resistance were studied. The results show that specimens exhibit anisotropy in microstructure, density, microhardness and wear resistance, the microhardness and wear resistance of XOY plane is higher and better than XOZ plane. X-Ray diffraction (XRD) analysis indicated that specimens exhibit FCC austenite phase, no new phase is found after heat treated, indicating that it has good thermal stability. Microstructure of SLM 316L exhibits obvious melt pools composed of columnar crystals and cellular crystals, some nano silicon oxides adhere to the surface of the cellular crystals. SLM 316L presents as intersecting melt pools on the XOY plane and fish-scale-like melt pools on the XOZ plane. After heat treated, the melt boundaries annihilate and recrystallization of the specimens lead to the coarsening of the microstructure. Microhardness results show the microhardness decrease after heat treated and the specimen with the lowest decrease in microhardness after solution+aging treatment. The friction and wear tests results reveal the specimen after solution+aging treatment has the lowest friction coefficient and smallest wear loss, exhibiting the best wear resistance.
Source: Lubricants
Authors: Menghui Sun, Qianqian Zhang, Jinxiu Wu, Hao Wang, Xu Wang, Hao Zhang, Yinong An, Yujie Liu, Long Ma
Institution: Inner Mongolia University of Science and Technology
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,137
Awards: KDP晶体用高活性介孔氧化铈非刚性复合磨料的研究, G5792025840
OpenAlex ID: W4409607524