The efficiency of tumble finishing as a final post-treatment for fatigue enhancement of notched laser powder bed fusion AlSi10Mg

被引：11
作者：
Maleki, Erfan [1 ]
Bagherifard, Sara [1 ]
Unal, Okan [2 ]
Revuru, Manoj [1 ]
Bandini, Michele [3 ]
Guagliano, Mario [1 ]
机构：
[1] Dept Mech Engn, Politecn Milano, Milan, Italy
[2] Karabuk Univ, Dept Mech Engn, Karabuk, Turkiye
[3] Peen Serv Srl, Bologna, Italy
来源：
SCIENTIFIC REPORTS | 2023年 / 13卷 / 01期
关键词：
MECHANICAL-PROPERTIES; SURFACE-ROUGHNESS; STAINLESS-STEEL; ALLOY; MICROSTRUCTURE; STRENGTH; BEHAVIOR; PARTS; DISLOCATIONS; RESISTANCE;
D O I：
10.1038/s41598-023-30660-6
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
A hybrid post-treatment combining tumble finishing as a final step after shot peening and heat treatment was developed to alleviate the adverse effects of internal and surface defects on the fatigue performance of laser powder bed fusion AlSi10Mg samples. The effects of each post-treatment were investigated individually and synergistically on microstructure, surface morphology and roughness, hardness, residual stresses, porosity, and rotating bending fatigue behavior of V-notched AlSi10Mg samples. The results reveal that tumble finishing can highly reduce surface roughness by 28 and 32% compared to the as-built and heat-treated states while inducing extra surface layer hardening and compressive residual stresses. The hybrid post-treatment of heat treatment + shot peening + tumble finishing significantly increased the fatigue life of the samples by over 500 times higher compared to the as-built series.
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页数：15
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