喷丸对SLM成形AlSi10Mg弯曲力学性能的影响

doi:10.3901/JME.260500

摘要/Abstract

摘要： 为研究喷丸处理对选择性激光熔化(Selective laser melting，SLM)成形AlSi10Mg弯曲力学性能的影响，在激光功率为180 W，扫描速度为1 300 mm/s下成形了AlSi10Mg的三点弯曲试样，分别对其进行单面和双面喷丸处理，使用激光共聚焦显微镜、硬质合金密度仪、显微硬度计、电子拉扭疲劳试验机和扫描电镜共同表征了喷丸对SLM成形AlSi10Mg试样密度、孔隙率、硬度、熔池形貌、组织及弯曲力学性能的影响。结果表明，喷丸处理会在一定程度上提高试样表层硬度，晶粒细化效果明显；双面喷丸处理试样密度最高、孔隙率最低，分别为2.634 3 g/cm³和0.962%，且双面喷丸试样综合弯曲力学性能最好，弯曲弹性模量为65.88 GPa，弯曲强度为489.12 MPa，断口处存在大量韧窝，表现为韧性断裂。

关键词: 选择性激光熔化, AlSi10Mg, 喷丸, 三点弯, 弯曲力学性能

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

中图分类号:

TG178

周雨薇, 黄勉, 杨冰, 郑皓瑜, 肖守讷, 阳光武, 朱涛, 王明猛. 喷丸对SLM成形AlSi10Mg弯曲力学性能的影响[J]. 机械工程学报, 2026, 62(10): 179-188.

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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链接本文: http://www.cjmenet.com.cn/CN/10.3901/JME.260500

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

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