Simultaneously improved strength, ductility and conductivity in a Be-added Al-Mg-Si alloy conductor under various heat treatments

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

Materials Letters Pub Date : 2025-04-14 DOI:10.1016/j.matlet.2025.138575

Yi Li , Fulin Jiang , Xiejun Hu , Yunhai Wang , Shu Hu , Jie Tang , Hui Zhang , Lei Liu , Ruifa Feng , Guoxing Li , Yao Wang , Yuxiang Lai , Jianghua Chen

引用次数: 0

Abstract

Al-Mg-Si alloy conductors require high strength, ductility, and conductivity for electrical applications. Common strengthening methods like microalloying and severe plastic deformation typically compromise ductility and conductivity. In this work, Be addition in Al-0.68 Mg-0.57Si alloy conductor synchronously improved tensile strength, elongation, and conductivity under two typical heat treatments. Be addition could delay the early precipitation kinetics, refine precipitate size while increase density and volume fraction. The HAADF-STEM, EELS, and DFT calculations revealed that Be atoms substituted Al and vacancies in B′ precipitate, enabled β″-B′ co-existence during aging treatment.

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在不同热处理条件下，同时提高了添加be的Al-Mg-Si合金导体的强度、延展性和导电性

铝镁硅合金导体需要高强度，延展性和导电性的电气应用。常见的强化方法，如微合金化和严重塑性变形，通常会损害延展性和导电性。在本研究中，在Al-0.68 Mg-0.57Si合金导体中添加Be，在两种典型的热处理下，同步提高了拉伸强度、伸长率和导电性。添加Be可以延缓早期析出动力学，细化析出物尺寸，提高密度和体积分数。HAADF-STEM、EELS和DFT计算表明，在时效处理过程中，Be原子取代了Al和B′沉淀中的空位，使β″-B′共存。

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