A combined experimental and numerical study on room temperature formable magnesium-silver-calcium alloys

JOURNAL OF ALLOYS AND COMPOUNDS

卷:834

Article

Bian, Mingzhe¹  Huang, Xinsheng¹  Chino, Yasumasa¹ 

[1] Natl Inst Adv Ind Sci & Technol, Multimat Res Inst, Nagoya, Aichi 4638560, Japan

关键词: Magnesium alloys;    Strength;    Formability;    Texture;    Simulation;   

DOI  :  10.1016/j.jallcom.2020.155017

来源: Elsevier

【 摘 要 】

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 < a > slip was increased with increasing the Ag content and the enhanced activity of prismatic < a > during rolling may partially lead to the formation of TD-split texture in the formable Mg-Ag-Ca alloys during annealing.

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