Tuning strength-ductility combination of the additively manufactured Al12Si based alloys via compositional regulation and plastic deformation

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A Pub Date : 2025-02-01 DOI:10.1016/j.msea.2025.147850

Tao Wen , Feipeng Yang , Jianying Wang , Zhilin Liu , Dong Qiu , Shouxun Ji , Hailin Yang

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引用次数: 0

Abstract

The enhanced strength-ductility synergy of Al12Si alloy manufactured via laser powder bed fusion (LPBF) was obtained through compositional regulation and post-fabrication plastic deformation. Microstructural characterizations showed that the typical synergy of multiple crystallised defects in brittle Si eutectic phase, including stacking faults (SFs), ultrafine nanotwins and 9R structure, co-contribute to the superb elongation of 23.7 % with the ultimate tensile strength of 189 MPa in as-LPBFed Al12Si alloy after hot-rolling deformation with a reduction rate of 70 %. In tandem with a trace of Mn and Fe additions, the UTS increases to 240 MPa with the El of 19.1 % under the same condition. Such an excellent strength-ductility synergy is mainly attributed to the formation of ultrafine α-Al₁₂(Fe,Mn)₃Si particles. This work offers a new perspective on the modification Al–Si alloys with the desired mechanical properties via LPBF and hot-rolling.

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来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.