等温退火过程中稀Mg-Al-Ca合金各向异性偏析驱动的织构弱化

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

Materials Research Letters Pub Date : 2023-07-21 DOI:10.1080/21663831.2023.2237996

Meng Zhang, Hailong Jia, M. Zha, Lei Zhao, Zhen-Ming Hua, Cheng Wang, Yipeng Gao, Hong Wang

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引用次数: 0

摘要

通过颗粒激发成核(PSN)和二次相颗粒的钉住效应来剪裁再结晶可以有效地削弱织构，这对于低合金无稀土镁合金来说仍然是一个挑战。在静态再结晶过程中，随着横向织构成分(TD)的出现，稀冷轧Mg-2.2Al-0.33Ca (wt.%)合金的织构降低。织构转变主要是由于Al和Ca原子在低取向角的基底取向晶界上优先偏析而导致的td取向再结晶晶粒的优先生长。研究结果为镁合金织构改性提供了深入的认识。Al和Ca在晶界上的各向异性共偏析是导致稀Mg-Al-Ca合金织构弱化的原因，这为这类合金的织构改性提供了一种策略。

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Anisotropic segregation-driven texture weakening in a dilute Mg-Al-Ca alloy during isothermal annealing

Tailoring recrystallization via particle-stimulated nucleation (PSN) and pinning effects from secondary phase particles effectively weakens textures, which is still challenging for low-alloyed rare earth-free Mg alloys. Herein, the texture of a dilute cold-rolled Mg-2.2Al-0.33Ca (wt.%) alloy is found to reduce with the appearance of transverse direction (TD) texture components during static recrystallization. The texture transition is mainly attributed to the preferential growth of TD-oriented recrystallized grains, resulting from the preferential segregation of Al and Ca atoms on basal-oriented grain boundaries with low misorientation angles. The findings provide an in-depth understanding of texture modification in Mg alloys. GRAPHICAL ABSTRACT IMPACT STATEMENT The anisotropic co-segregation of Al and Ca on grain boundaries is responsible for the texture weakening of a dilute Mg-Al-Ca alloy, which provides a strategy for texture modification in such 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.