Optimization of die casting process and microstructure-mechanical properties of Al-Sc alloys

IF 2.6 3区材料科学 Q2 ENGINEERING, MANUFACTURING

International Journal of Material Forming Pub Date : 2025-03-19 DOI:10.1007/s12289-025-01885-9

Yatong Xing, Xiaoxin Zhang, Yanwei Ma, Zhirui Tian, Xia Li, Jianbo Yu, Weidong Xuan, Zhongming Ren

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引用次数: 0

Abstract

Die cast is a promising metal forming process that could potentially replace powder metallurgy for producing high Sc-contained Al-Sc sputtering targets. However, die cast of Al-Sc alloys with Sc contents more than 2 wt.% are not yet investigated. This work optimized the die-casting process parameters of Al-Sc alloys based on the air entrainment ratio and shrinkage porosity through numerical simulation and explored the microstructure and mechanical properties of Al-Sc die castings with Sc contents of 2 wt.%, 5 wt.%, and 10 wt.% by experiments. The results show that the influence weighting of parameters on defects is die temperature > pouring temperature > injection velocity, and the optimum parameter combination is pouring temperature of superheat of 60 ℃, die temperature of 240 ℃, and injection velocity of 3 m/s; The solidification structure of Al-Sc die castings comprised equiaxed grains, deformed and partially fragmented columnar grains, and uniformly distributed Al₃Sc precipitates. An increase of Sc content led to grain refinement and a rise in the size and volume fraction of Al₃Sc precipitates. The elongation and tensile strength of Al-Sc die castings were significantly higher than those of gravity castings, whereas these properties diminished with increasing Sc content.

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来源期刊

International Journal of Material Forming ENGINEERING, MANUFACTURING-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.10

自引率

4.20%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal publishes and disseminates original research in the field of material forming. The research should constitute major achievements in the understanding, modeling or simulation of material forming processes. In this respect ‘forming’ implies a deliberate deformation of material. The journal establishes a platform of communication between engineers and scientists, covering all forming processes, including sheet forming, bulk forming, powder forming, forming in near-melt conditions (injection moulding, thixoforming, film blowing etc.), micro-forming, hydro-forming, thermo-forming, incremental forming etc. Other manufacturing technologies like machining and cutting can be included if the focus of the work is on plastic deformations. All materials (metals, ceramics, polymers, composites, glass, wood, fibre reinforced materials, materials in food processing, biomaterials, nano-materials, shape memory alloys etc.) and approaches (micro-macro modelling, thermo-mechanical modelling, numerical simulation including new and advanced numerical strategies, experimental analysis, inverse analysis, model identification, optimization, design and control of forming tools and machines, wear and friction, mechanical behavior and formability of materials etc.) are concerned.