High-performance aluminum alloy with fully equiaxed grain microstructure fabricated by laser metal deposition

Yang X. Cai R. Chen C. Araby S. Li Y. Wang W. Meng Q.
14 November 2022 Springer Nature

Journal of Materials Research
2022 #37 Issue 21 3658 - 3667 pp.

Since scandium has a significant refining effect on aluminum alloys, the research on aluminum-scandium alloys has continued for decades. The development of Scalmalloy which has scandium element broadens the applications for additive manufacturing (AM) for scandium–aluminum alloys. In this research, Scalmalloy is processed by the laser-melting deposition (LMD) method. A fully equiaxed grain microstructure is identified and its formation related to the characteristics of LMD-processing method is discussed. The morphology and distribution of Al₃Sc and Al₃Zr after processing is observed and discussed, and the elemental distribution is analysed. The high mechanical properties are reached and their relation to the microstructure of the Scalmalloy processed is investigated. With compiled results and observations, this study provides a better understanding of microstructure formation and the mechanical performance of Scalmalloy fabricated by the LMD method which offers a good basis for any further research in the application of LMD for high-performance aluminum alloy.

Enhancement mechanism , Equiaxed grains , Laser deposition manufacturing , Scalmalloy

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College of Aerospace Engineering and Key Laboratory of Fundamental Science for Aeronautical Digital Manufacturing Process, Shenyang Aerospace University, 37 Daoyi South Avenue, Liaoning, Shenyang, 110136, China
Gas Turbine Co., Ltd, Aero Engine Corporation of China, 109 Quanyun Road, Liaoning, Shenyang, 110167, China
School of Mechanical, Aerospace and Automotive Engineering, Coventry University, Coventry, CV1 2JH, United Kingdom
School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan

College of Aerospace Engineering and Key Laboratory of Fundamental Science for Aeronautical Digital Manufacturing Process
Gas Turbine Co.
School of Mechanical
School of Engineering and Digital Sciences

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