Bonnici Luana, Buhagiar Joseph, Cassar Glenn, Vella Kelsey Ann, Chen Jian, Zhang Xiyu, Huang Zhiquan, Zammit Ann
Department of Metallurgy and Materials Engineering, University of Malta, MSD 2080 Msida, Malta.
School of Materials Science and Engineering, SEU University, Nanjing 211189, China.
Materials (Basel). 2023 Jan 10;16(2):663. doi: 10.3390/ma16020663.
This research studies the individual and combined effects of mechanical shot peening and the deposition of TiAlCuN coating on additively manufactured 316L stainless steel. Shot peening has been found to induce a 40% increase in surface hardness, while the combined effect of shot peening and the coating produced an approximately three-fold increase in surface hardness when compared to the as-printed coupons. Shot peening reduced the surface roughness of printed metal coupons by 50%, showing that shot peening can also serve to improve the surface finish of as-printed 316L stainless steel components. The peening process was found to induce a compressive residual stress of 589 MPa, with a maximum affected depth of approximately 200 μm. Scratch testing of the printed and coated specimens showed complete delamination failure at a normal load of 14 N, when compared to hybrid treated samples which failed at 10 N. On the other hand, from the corrosion tests, it was found that the hybrid treated samples provided the optimal results as opposed to the other variables.
本研究探讨了机械喷丸处理以及TiAlCuN涂层沉积对增材制造316L不锈钢的单独和综合影响。已发现喷丸处理可使表面硬度提高40%，而与打印后的试样相比，喷丸处理和涂层的综合作用使表面硬度提高了约三倍。喷丸处理使打印金属试样的表面粗糙度降低了50%，表明喷丸处理还可用于改善打印后的316L不锈钢部件的表面光洁度。发现喷丸处理过程会产生589 MPa的压缩残余应力，最大影响深度约为200μm。对打印和涂层试样的划痕测试表明，在14 N的法向载荷下会出现完全分层失效，而混合处理的样品在10 N时失效。另一方面，从腐蚀测试中发现，与其他变量相比，混合处理的样品提供了最佳结果。
