Effect of Shot Peening on Bending Mechanical Properties of SLM-formed AlSi10Mg

doi:10.3901/JME.260500

Abstract

Abstract: In order to study the effect of shot peening on the bending mechanical properties of SLM (Selective Laser Melting)-formed AlSi10Mg, the three-point bending specimens of AlSi10Mg were formed at a laser power of 180 W and a scanning speed of 1 300 mm/s. The single-sided and double-sided shot peening treatments were carried out respectively. The effects of shot peening on the density, porosity, hardness, molten pool morphology, microstructure and bending mechanical properties of SLM-processed AlSi10Mg specimens were characterized by laser confocal microscopy, cemented carbide densimeter, microhardness tester, electronic tensile-torsional fatigue tester and scanning electron microscopy. The results show that shot peening treatment can improve the surface hardness of the sample to a certain extent, and the grain refinement effect is obvious. The double-sided shot peening sample has the highest density and the lowest porosity, which are 2.634 3 g/cm³ and 0.962%, respectively. The comprehensive bending mechanical properties of the double-sided shot peening sample are the best. The bending elastic modulus is 65.88 GPa, and the bending strength is 489.12 MPa. There are a large number of dimples at the fracture, showing ductile fracture.

Key words: SLM, AlSi10Mg, shot peening, three point bending, bending mechanical properties

CLC Number:

TG178

ZHOU Yuwei, HUANG Mian, YANG Bing, ZHENG Haoyu, XIAO Shoune, YANG Guangwu, ZHU Tao, WANG Mingmeng. Effect of Shot Peening on Bending Mechanical Properties of SLM-formed AlSi10Mg[J]. Journal of Mechanical Engineering, 2026, 62(10): 179-188.

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URL: http://www.cjmenet.com.cn/EN/10.3901/JME.260500

http://www.cjmenet.com.cn/EN/Y2026/V62/I10/179

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