α-Mg / LPSO界面诱导的裂纹扩展路径偏转及其对铸造Mg-RE-Zn合金断裂韧性的影响

IF 15.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys Pub Date : 2024-11-30 DOI:10.1016/j.jma.2024.11.021

Qiankun Li, Li Jin, Fenghua Wang, Shuai Dong, Jian Zeng, Fulin Wang, Jie Dong

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引用次数: 0

摘要

断裂韧性差限制了高强度铸造Mg-Re-Zn合金的广泛应用。调节合金组织，如α-Mg相、块状LPSO（长周期堆积顺序）相和片层状LPSO相，为通过铸造和热处理提高塑性提供了多种可能性。本研究根据裂纹萌生、扩展和极限断裂韧性对不同的界面类型进行了分类。清晰地展示了与合金成分和热处理有关的界面调制结果，阐明了对裂纹萌生和扩展路径的影响。据此，提出了优化和提高合金断裂韧性的组织构型规则和相应的热处理工艺。块状LPSO应具有适当的分散性和大小，同时避免片状LPSO。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

$Crack propagation path deflection induced by α-Mg / LPSO interface and its effect on the fracture toughness of cast Mg-RE-Zn alloys$

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Crack propagation path deflection induced by α-Mg / LPSO interface and its effect on the fracture toughness of cast Mg-RE-Zn alloys

The poor fracture toughness limits the widespread application of high-strength cast Mg-Re-Zn alloys. Regulating the alloy microstructure, with phases such as α-Mg, blocky LPSO (long-period stacking order), and lamellar LPSO, offers various possibilities to enhance ductility by casting and heat treatment. This study categorizes different interface types concerning crack initiation, propagation, and ultimate fracture toughness. It distinctly presents the results of interface modulation related to alloy composition and heat treatment, elucidating the influence on crack initiation and propagation paths. Consequently, it proposes structural configurations rule and relevant heat treatment processes that can optimize and improve alloy fracture toughness. Blocky LPSO should have appropriate dispersion and size while avoiding lamellar LPSO.

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来源期刊

Journal of Magnesium and Alloys Engineering-Mechanics of Materials

CiteScore

20.20

自引率

14.80%

发文量

审稿时长

59 days

期刊介绍： The Journal of Magnesium and Alloys serves as a global platform for both theoretical and experimental studies in magnesium science and engineering. It welcomes submissions investigating various scientific and engineering factors impacting the metallurgy, processing, microstructure, properties, and applications of magnesium and alloys. The journal covers all aspects of magnesium and alloy research, including raw materials, alloy casting, extrusion and deformation, corrosion and surface treatment, joining and machining, simulation and modeling, microstructure evolution and mechanical properties, new alloy development, magnesium-based composites, bio-materials and energy materials, applications, and recycling.