Optimizing the strength-ductility balance of microalloyed Al-Mg-Si casting alloys

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2024-11-01 DOI:10.1016/j.matlet.2024.137645

T.R. Luo , Z.Z. Fan , H.X. Hu , Y.Z. Tian

引用次数: 0

Abstract

It is desired to optimize the strength-ductility balance of Al-Mg-Si casting alloy. In this study, Al-6 Mg-1Si-0.4Mn-0.5Cu-0.15Zr (6 Mg) and Al-8 Mg-1Si-0.8Mn-1.5Cu-0.15Zr (8 Mg) alloys were designed. The microstructure and mechanical properties of the alloys were further modified by heat treatment. The as-cast 6 Mg alloy exhibits balanced ultimate tensile strength (UTS) of 268.7 ± 11.5 MPa and elongation to failure (EF) of 5 ± 0.8 %, in contrast, the EF of the 8 Mg alloy is only 1.4 ± 0.3 %. Further heat treatment impacts slightly on the tensile properties of the 6 Mg alloy but enhances the ductility of the 8 Mg alloy significantly. Mechanisms for the distinct responses on the heat treatment of the alloys were discussed.

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优化微合金化铝镁硅铸造合金的强度-电导率平衡

人们希望优化铝镁硅铸造合金的强度-电导平衡。本研究设计了 Al-6 Mg-1Si-0.4Mn-0.5Cu-0.15Zr (6 Mg) 和 Al-8 Mg-1Si-0.8Mn-1.5Cu-0.15Zr (8 Mg) 合金。通过热处理进一步改变了合金的微观结构和机械性能。铸造时的 6 Mg 合金显示出 268.7 ± 11.5 兆帕的均衡极限拉伸强度（UTS）和 5 ± 0.8 % 的失效伸长率（EF），相比之下，8 Mg 合金的失效伸长率仅为 1.4 ± 0.3 %。进一步的热处理对 6 Mg 合金的拉伸性能影响较小，但 8 Mg 合金的延展性却显著增强。讨论了合金在热处理过程中产生不同反应的机理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive