Alloy design for laser powder bed fusion additive manufacturing:a critical review  

作　　者：Zhuangzhuang Liu Qihang Zhou Xiaokang Liang Xiebin Wang Guichuan Li Kim Vanmeensel Jianxin Xie 

机构地区：[1]Key Laboratory for Advanced Materials Processing(MOE),Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,People’s Republic of China [2]Beijing Advanced Innovation Center for Materials Genome Engineering,University of Science and Technology Beijing,Beijing 100083,People’s Republic of China [3]Beijing Laboratory of Metallic Materials and Processing for Modern Transportation,Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,People’s Republic of China [4]Capital Aerospace Machinery Corporation Limited,Beijing 100076,People’s Republic of China [5]Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education),Shandong University,Jingshi Road 17923,Jinan 250061,People’s Republic of China [6]Department of Materials Engineering,KU Leuven,Leuven 3001,Belgium

出　　处：《International Journal of Extreme Manufacturing》2024年第2期29-63,共35页极端制造（英文）

基　　金：financially supported by the National Key Research and Development Program of China(2022YFB4600302);National Natural Science Foundation of China(52090041);National Natural Science Foundation of China(52104368);National Major Science and Technology Projects of China(J2019-VII-0010-0150)。

摘　　要：Metal additive manufacturing(AM)has been extensively studied in recent decades.Despite the significant progress achieved in manufacturing complex shapes and structures,challenges such as severe cracking when using existing alloys for laser powder bed fusion(L-PBF)AM have persisted.These challenges arise because commercial alloys are primarily designed for conventional casting or forging processes,overlooking the fast cooling rates,steep temperature gradients and multiple thermal cycles of L-PBF.To address this,there is an urgent need to develop novel alloys specifically tailored for L-PBF technologies.This review provides a comprehensive summary of the strategies employed in alloy design for L-PBF.It aims to guide future research on designing novel alloys dedicated to L-PBF instead of adapting existing alloys.The review begins by discussing the features of the L-PBF processes,focusing on rapid solidification and intrinsic heat treatment.Next,the printability of the four main existing alloys(Fe-,Ni-,Al-and Ti-based alloys)is critically assessed,with a comparison of their conventional weldability.It was found that the weldability criteria are not always applicable in estimating printability.Furthermore,the review presents recent advances in alloy development and associated strategies,categorizing them into crack mitigation-oriented,microstructure manipulation-oriented and machine learning-assisted approaches.Lastly,an outlook and suggestions are given to highlight the issues that need to be addressed in future work.

关 键 词：laser powder bed fusion alloy design PRINTABILITY crack mitigation 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]