Strength and plasticity improvement induced by strong grain refinement after Zr alloying in selective laser-melted AlSiMg1.4 alloy

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING Transactions of Nonferrous Metals Society of China Pub Date : 2024-09-01 DOI:10.1016/S1003-6326(24)66572-6

Yao-xiang GENG , Chun-feng ZAI , Jiang YU , Hao TANG , Hong-wei LÜ , Zhi-jie ZHANG

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Abstract

In order to enhance the mechanical properties of the selective laser-melted (SLM) high-Mg content AlSiMg1.4 alloy, the Zr element was introduced. The influence of Zr alloying on the processability, microstructure, and mechanical properties of the alloy was systematically investigated through performing microstructure analysis and tensile testing. It was demonstrated that the SLM-fabricated AlSiMg1.4−Zr alloy exhibited high process stability with a relative density of over 99.5% at various process parameters. Besides, the strong grain refinement induced by the primary Al₃Zr particle during the melt solidification process simultaneously enhanced both the strength and plasticity of the alloy. The values for the yield strength, ultimate tensile strength, and elongation of the SLM-fabricated AlSiMg1.4−Zr were (343±3) MPa, (485±4) MPa, and (10.2±0.2)%, respectively, demonstrating good strength− plasticity synergy in comparison to the AlSiMg1.4 and other Al−Si-based alloys fabricated by SLM.

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选择性激光熔炼 AlSiMg1.4 合金中 Zr 合金化后强晶粒细化诱导的强度和塑性改善

为了提高选择性激光熔炼（SLM）高镁含量 AlSiMg1.4 合金的机械性能，引入了 Zr 元素。通过进行微观结构分析和拉伸测试，系统地研究了 Zr 合金对合金的加工性、微观结构和机械性能的影响。结果表明，SLM 制造的 AlSiMg1.4-Zr 合金具有很高的工艺稳定性，在不同的工艺参数下，相对密度超过 99.5%。此外，在熔体凝固过程中，Al3Zr 主颗粒诱导的强晶粒细化同时提高了合金的强度和塑性。SLM 制造的 AlSiMg1.4-Zr 的屈服强度、极限拉伸强度和伸长率值分别为 (343±3) MPa、(485±4) MPa 和 (10.2±0.2)%，与 AlSiMg1.4 和其他用 SLM 制造的铝硅基合金相比，显示出良好的强度-塑性协同作用。

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.