Abstract This work investigated effects of silver (Ag) content on the microstructure, texture and mechanical properties of magnesium–silver–calcium alloys by a combined experimental and numerical approach. A series of ternary magnesium–silver–calcium alloys with Ag concentrations between 0.3 and 12 wt% were prepared by hot-extrusion, hot-rolling followed by annealing. As-rolled sheets showed rolling direction split textures with double peaks irrespective of the Ag content. A new component where (0002) basal poles tilted from the normal direction toward the transverse direction (TD) appeared when the Ag content was increased to 1 wt% after annealing. The Mg–xAg–0.1Ca (x = 0.3, 1, 2 and 3) alloys showed excellent room temperature (RT) formability, which could be mainly ascribed to weak basal textures developed after annealing. When the Ag content was increased to 6 wt%, a weak TD-split texture with a homogeneous fine-grained microstructure was developed, which resulted in excellent RT formability and high strength. In contrast, the Mg–12Ag–0.1Ca alloy showed much lower RT formability and ductility in comparison with Mg–Ag–Ca alloys with lower Ag concentrations due to the presence of coarse AgMg4 particles. Visco-plastic self-consistent simulation results revealed that the activity of prismatic slip was increased with increasing the Ag content and the enhanced activity of prismatic during rolling may partially lead to the formation of TD-split texture in the formable Mg–Ag–Ca alloys during annealing.

中文翻译：

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室温可成形镁-银-钙合金的联合实验和数值研究

摘要 这项工作通过结合实验和数值方法研究了银 (Ag) 含量对镁-银-钙合金的微观结构、织构和机械性能的影响。通过热挤压、热轧和退火制备了一系列 Ag 浓度在 0.3 至 12 wt% 之间的三元镁-银-钙合金。无论银含量如何，轧制后的板材都显示出具有双峰的轧制方向分裂织构。当退火后Ag含量增加到1wt％时，出现了一种新的成分，其中（0002）基极从法线方向向横向（TD）倾斜。Mg-xAg-0.1Ca (x = 0.3, 1, 2 和 3) 合金显示出优异的室温 (RT) 成形性，这主要归因于退火后形成的弱基底织构。当 Ag 含量增加到 6 wt% 时，会形成具有均匀细晶显微组织的弱 TD 劈裂织构，从而导致优异的 RT 成形性和高强度。相比之下，与具有较低 Ag 浓度的 Mg-Ag-Ca 合金相比，Mg-12Ag-0.1Ca 合金显示出低得多的 RT 成形性和延展性，因为存在粗大的 AgMg4 颗粒。粘塑性自洽模拟结果表明，棱柱滑移的活性随着Ag含量的增加而增加，并且在轧制过程中棱柱活性的增强可能部分导致可成形Mg-Ag-Ca合金中TD-分裂织构的形成在退火过程中。相比之下，与具有较低 Ag 浓度的 Mg-Ag-Ca 合金相比，Mg-12Ag-0.1Ca 合金显示出低得多的 RT 成形性和延展性，因为存在粗大的 AgMg4 颗粒。粘塑性自洽模拟结果表明，棱柱滑移的活性随着Ag含量的增加而增加，并且在轧制过程中棱柱活性的增强可能部分导致可成形Mg-Ag-Ca合金中TD-分裂织构的形成在退火过程中。相比之下，与具有较低 Ag 浓度的 Mg-Ag-Ca 合金相比，Mg-12Ag-0.1Ca 合金显示出低得多的 RT 成形性和延展性，因为存在粗大的 AgMg4 颗粒。粘塑性自洽模拟结果表明，棱柱滑移的活性随着Ag含量的增加而增加，并且在轧制过程中棱柱活性的增强可能部分导致可成形Mg-Ag-Ca合金中TD-分裂织构的形成在退火过程中。