旋锻组织调控协同提高Mg-6Li-3Al-1Sn合金的强度和塑性

IF 8.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Letters Pub Date : 2023-11-08 DOI:10.1080/21663831.2023.2278589

Gang Zhou, Yan Yang, Yangyang Luo, Qian Li, Qun Luo, Yu Zhang, Bin Jiang, Xiaodong Peng, Fusheng Pan

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引用次数: 0

摘要

采用热挤压-室温旋锻法制备了具有双峰晶组织的Mg-6Li-3Al-1Sn (LAT631)合金。挤压态LAT631合金发生动态再结晶，在RTRS过程中产生大量孪晶。特别是当大量Al溶质包围富锡粒子时，通过RTRS产生了Al偏析。引入孪晶和富al偏析是提高RSed合金强度的关键因素，DRXed晶粒比例的增加有利于提高RSed合金的延伸率。该研究表明，通过旋转锻压对再结晶和偏析的策略控制为优化Mg-Li合金的力学性能提供了一种创新的方法。

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Synergistic improvement of strength and plasticity of Mg-6Li-3Al-1Sn alloy by microstructure regulation via rotary swaging

A Mg-6Li-3Al-1Sn (LAT631) alloy with a bimodal-grained structure was prepared via hot extrusion, followed by room temperature rotary swaging (RTRS). The as-extruded LAT631 alloy undergoes dynamical recrystallization, and massive twins are introduced during RTRS. Especially, Al segregation is generated with massive Al solutes surrounding Sn-rich particles via RTRS. Introducing twins and Al-rich segregation are critical factors for enhancing strength, and the increased proportion of DRXed grains is beneficial to improving the elongation in RSed alloy. This research demonstrates that strategic control of recrystallization and segregation by rotary swaging provides an innovative approach to optimizing the mechanical properties of Mg-Li alloys.

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来源期刊

Materials Research Letters Materials Science-General Materials Science

CiteScore

12.10

自引率

3.60%

发文量

审稿时长

3.3 months

期刊介绍： Materials Research Letters is a high impact, open access journal that focuses on the engineering and technology of materials, materials physics and chemistry, and novel and emergent materials. It supports the materials research community by publishing original and compelling research work. The journal provides fast communications on cutting-edge materials research findings, with a primary focus on advanced metallic materials and physical metallurgy. It also considers other materials such as intermetallics, ceramics, and nanocomposites. Materials Research Letters publishes papers with significant breakthroughs in materials science, including research on unprecedented mechanical and functional properties, mechanisms for processing and formation of novel microstructures (including nanostructures, heterostructures, and hierarchical structures), and the mechanisms, physics, and chemistry responsible for the observed mechanical and functional behaviors of advanced materials. The journal accepts original research articles, original letters, perspective pieces presenting provocative and visionary opinions and views, and brief overviews of critical issues.