Multi-scale defects in powder-based additively manufactured metals and alloys

作     者：J.Fu H.Li X.Song M.W.Fu J.Fu;H.Li;X.Song;M.W.Fu

作者机构：Department of Mechanical EngineeringThe Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina State Key Laboratory of Solidification ProcessingSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Department of Mechanical and Automation EngineeringChinese University of Hong KongShatinHong KongChina 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第122卷第27期

页      面：165-199页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the funding support to this research via the projects of ZVMR,BBAT and ZE1W from The Hong Kong Polytechnic University project#RNE-p2–21 of the Shun Hing Institute of Advanced Engineering The Chinese University of Hong Kong and the GRF projects(Nos.15223520 and 15228621) 

主　　题：Metal additive manufacturing Multi-scale defects Detection and modeling Mechanical properties Defect control and mitigation 

摘      要：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 *** 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 *** particular,the microstructural defects are further divided into internal cracks and pores,textured columnar grains,compositional defects and dislocation *** root causes of the multi-scale defects are *** key factors that affect the defect formation are identified and *** detection methods and modeling of the multi-scale defects are briefly *** effects of the multi-scale defects on the mechanical properties especially for tensile properties and fatigue performance of AMed metallic components are *** control and mitigation methods for the corresponding defects,include process parameter control,post processing,alloy design and hybrid AM techniques,are summarized and *** research aspect,current research gaps and future prospects from three important aspects of the multi-scale AM defects are identified and delineated.