Anisotropic segregation-driven texture weakening in a dilute Mg-Al-Ca alloy during isothermal annealing
Anisotropic segregation-driven texture weakening in a dilute Mg-Al-Ca alloy during isothermal annealing
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DOI：
10.1080/21663831.2023.2237996
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发表时间：
2023-07
影响因子：
8.3
通讯作者：
Meng Zhang;Hailong Jia;M. Zha;Lei Zhao;Zhen-Ming Hua;Cheng Wang;Yipeng Gao;Hong Wang
中科院分区：
文献类型：
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作者：
Meng Zhang;Hailong Jia;M. Zha;Lei Zhao;Zhen-Ming Hua;Cheng Wang;Yipeng Gao;Hong Wang
通过颗粒激发形核（PSN）和第二相颗粒的钉扎效应来定制再结晶有效地削弱了织构，这对于低合金化的不含稀土的镁合金来说仍然是具有挑战性的。本文中，稀释冷轧Mg-2.2Al-0.33Ca（wt.%）发现合金在静态再结晶过程中，横向（TD）织构分量的出现减少。这种织构转变主要是由于Al和Ca原子在低取向差角的基底取向晶界上的择优偏聚导致TD取向再结晶晶粒的择优生长。研究结果为镁合金织构改性提供了深入的理解。图形摘要影响声明Al和Ca在晶界上的各向异性共偏析是导致稀Mg-Al-Ca合金的织构弱化的原因，这为此类合金中的织构改性提供了策略。
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.