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

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外文摘要：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.

外文关键词：

laser powder bed fusionalloy designprintabilitycrack mitigation

作者：

Zhuangzhuang Liu、Qihang Zhou、Xiaokang Liang、Xiebin Wang、Guichuan Li、Kim Vanmeensel、Jianxin Xie

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作者单位：

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

Beijing Advanced Innovation Center for Materials Genome Engineering,University of Science and Technology Beijing,Beijing 100083,People's Republic of China

Beijing Laboratory of Metallic Materials and Processing for Modern Transportation,Institute for Advanced Materials and Technology,University of Science and Technology B

Capital Aerospace Machinery Corporation Limited,Beijing 100076,People's Republic of China

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

Department of Materials Engineering,KU Leuven,Leuven 3001,Belgium

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基金：

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Major Science and Technology Projects of China

项目编号：

2022YFB46003025209004152104368J2019-Ⅶ-0010-0150

出版年：

2024

DOI：

10.1088/2631-7990/ad1657

极端制造(英文)

CSTPCDEI

ISSN：

年,卷(期)：2024.6(2)