Ti-6Al-4V powder reuse in laser powder bed fusion (L-PBF): The effect on porosity, microstructure, and mechanical behavior

被引：31
|
作者：
Soltani-Tehrani, Arash [1 ,2 ]
Isaac, John P. [2 ]
Tippur, Hareesh, V [1 ,2 ]
Silva, Daniel F. [1 ,3 ]
Shao, Shuai [1 ,2 ]
Shamsaei, Nima [1 ,2 ]
机构：
[1] Auburn Univ, Natl Ctr Addit Mfg Excellence NCAME, Auburn, AL 36849 USA
[2] Auburn Univ, Dept Mech Engn, Auburn, AL 36849 USA
[3] Auburn Univ, Dept Ind & Syst Engn, Auburn, AL 36849 USA
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2023年 / 167卷
基金：
美国国家科学基金会;
关键词：
Laser powder bed fusion (L-PBF; LB-PBF); Additive manufacturing (AM); Fatigue; Fracture; Part location; PARTS; QUALITY;
D O I：
10.1016/j.ijfatigue.2022.107343
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
This work investigated the effects of powder reuse, and location dependency on the mechanical properties of plasma atomized Ti-6Al-4V Grade 5 parts manufactured via laser powder bed fusion (L-PBF). Reusing the powder enhanced powder flowability and packing state while increasing the oxygen. Fatigue performance improved with limited reuse for the specimens upstream of the shield gas and decreased at downstream locations due to large critical defects. Powder reuse increased tensile strength and the critical energy release rate under high strain-rate loading. The specimens in downstream locations suffered more from spattering, resulting in lower fatigue performance and tensile ductility.
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页数：16
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