Review on laser directed energy deposited aluminum alloys  

作　　者：Tian-Shu Liu Peng Chen Feng Qiu Hong-Yu Yang Nicholas Tan Yew Jin Youxiang Chew Di Wang Ruidi Li Qi-Chuan Jiang Chaolin Tan 

机构地区：[1]Singapore Institute of Manufacturing Technology(SIMTech),Agency for Science,Technology and Research(A∗STAR),5 Cleantech Loop,Singapore 636732,Singapore [2]State Key Laboratory of Automotive Simulation and Control,Jilin University,Changchun 130025,People’s Republic of China [3]Key Laboratory of Automobile Materials,Ministry of Education and Department of Materials Science and Engineering,Jilin University,Changchun 130025,People’s Republic of China [4]School of Mechanical&Automotive Engineering,South China University of Technology,Guangzhou 510640,People’s Republic of China [5]State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,People’s Republic of China

出　　处：《International Journal of Extreme Manufacturing》2024年第2期84-131,共48页极端制造（英文）

基　　金：supported by the 2022 MTC Young Individual Research Grants(Grant No.M22K3c0097);the Singapore Research,Innovation and Enterprise(RIE)2025 Plan;Singapore Aerospace Programme Cycle 16(Grant No.M2215a0073)。

摘　　要：Lightweight aluminum(Al)alloys have been widely used in frontier fields like aerospace and automotive industries,which attracts great interest in additive manufacturing(AM)to process high-value Al parts.As a mainstream AM technique,laser-directed energy deposition(LDED)shows good scalability to meet the requirements for large-format component manufacturing and repair.However,LDED Al alloys are highly challenging due to their inherent poor printability(e.g.low laser absorption,high oxidation sensitivity and cracking tendency).To further promote the development of LDED high-performance Al alloys,this review offers a deep understanding of the challenges and strategies to improve printability in LDED Al alloys.The porosity,cracking,distortion,inclusions,element evaporation and resultant inferior mechanical properties(worse than laser powder bed fusion)are the key challenges in LDED Al alloys.Processing parameter optimizations,in-situ alloy design,reinforcing particle addition and field assistance are the efficient approaches to improving the printability and performance of LDED Al alloys.The underlying correlations between processes,alloy innovation,characteristic microstructures,and achievable performances in LDED Al alloys are discussed.The benchmark mechanical properties and primary strengthening mechanism of LDED Al alloys are summarized.This review aims to provide a critical and in-depth evaluation of current progress in LDED Al alloys.Future opportunities and perspectives in LDED high-performance Al alloys are also outlined.

关 键 词：additive manufacturing laser directed energy deposition(LDED) aluminum alloys PRINTABILITY aluminum matrix composite auxiliary fields mechanical properties 

分 类 号：TG665[金属学及工艺—金属切削加工及机床] TG146.21[一般工业技术—材料科学与工程]