TY - JOUR
T1 - Multi-scale defects in powder-based additively manufactured metals and alloys
AU - Fu, J.
AU - Li, H.
AU - Song, X.
AU - Fu, M. W.
N1 - Publisher Copyright:
© 2022
PY - 2022/9/20
Y1 - 2022/9/20
N2 - Defect formation is a critical challenge for powder-based metal additive manufacturing (AM). Current understanding on the three important issues including formation mechanism, influence and control method of metal AM defects should be updated. In this review paper, multi-scale defects in AMed metals and alloys are identified and for the first time classified into three categories, including geometry related, surface integrity related and microstructural defects. In particular, the microstructural defects are further divided into internal cracks and pores, textured columnar grains, compositional defects and dislocation cells. The root causes of the multi-scale defects are discussed. The key factors that affect the defect formation are identified and analyzed. The detection methods and modeling of the multi-scale defects are briefly introduced. The effects of the multi-scale defects on the mechanical properties especially for tensile properties and fatigue performance of AMed metallic components are reviewed. Various control and mitigation methods for the corresponding defects, include process parameter control, post processing, alloy design and hybrid AM techniques, are summarized and discussed. From research aspect, current research gaps and future prospects from three important aspects of the multi-scale AM defects are identified and delineated.
AB - Defect formation is a critical challenge for powder-based metal additive manufacturing (AM). Current understanding on the three important issues including formation mechanism, influence and control method of metal AM defects should be updated. In this review paper, multi-scale defects in AMed metals and alloys are identified and for the first time classified into three categories, including geometry related, surface integrity related and microstructural defects. In particular, the microstructural defects are further divided into internal cracks and pores, textured columnar grains, compositional defects and dislocation cells. The root causes of the multi-scale defects are discussed. The key factors that affect the defect formation are identified and analyzed. The detection methods and modeling of the multi-scale defects are briefly introduced. The effects of the multi-scale defects on the mechanical properties especially for tensile properties and fatigue performance of AMed metallic components are reviewed. Various control and mitigation methods for the corresponding defects, include process parameter control, post processing, alloy design and hybrid AM techniques, are summarized and discussed. From research aspect, current research gaps and future prospects from three important aspects of the multi-scale AM defects are identified and delineated.
KW - Defect control and mitigation
KW - Detection and modeling
KW - Mechanical properties
KW - Metal additive manufacturing
KW - Multi-scale defects
UR - http://www.scopus.com/inward/record.url?scp=85127215202&partnerID=8YFLogxK
U2 - 10.1016/j.jmst.2022.02.015
DO - 10.1016/j.jmst.2022.02.015
M3 - 文献综述
AN - SCOPUS:85127215202
SN - 1005-0302
VL - 122
SP - 165
EP - 199
JO - Journal of Materials Science and Technology
JF - Journal of Materials Science and Technology
ER -