Microstructure refinement by a novel friction-based processing on Mg-Zn-Ca alloy

Materials Research Proceedings Pub Date : 2024-05-15 DOI:10.21741/9781644903131-224

Ting Chen

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Abstract

Abstract. Insufficient mechanical properties and uncontrollable degradation rates limit the wide application of Mg alloys in bioimplant materials. Microstructure refinement is a common method to improve both the mechanical properties and the corrosion resistance of Mg alloys. In order to efficiently obtain Mg alloys with fine microstructures for potential applications in bioimplant materials, a novel constrained friction processing (CFP) was proposed. In this work, the resulting compression properties of ZX10 alloy obtained by CFP with optimized processing parameter are reported. Additionally, the microstructure evolution during CFP was studied. The results show that during CFP, materials are subjected to high shear strain at the transition zone between the stir zone and thermo-mechanical affected zone, leading to recrystallization with strong local basal fiber shear texture. As the shoulder plunges down, the fraction of recrystallized grain and grain size increase. ZX10 alloy obtained by CFP exhibited higher compressive yield strength by more than 300% and ultimate compressive strength improves by 60%, which indicates the bright prospect of CFP for Mg processing.

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通过新型摩擦加工细化镁锌钴合金的微观结构

摘要镁合金的机械性能不足和不可控制的降解率限制了其在生物植入材料中的广泛应用。微结构细化是提高镁合金机械性能和耐腐蚀性能的常用方法。为了有效地获得具有精细微结构的镁合金，使其在生物植入材料中得到潜在的应用，我们提出了一种新颖的约束摩擦加工（CFP）方法。在这项研究中，报告了通过优化加工参数的 CFP 工艺获得的 ZX10 合金的压缩性能。此外，还研究了 CFP 过程中的微观结构演变。结果表明，在 CFP 过程中，材料在搅拌区和热机械影响区之间的过渡区受到高剪切应变，导致再结晶，并产生强烈的局部基底纤维剪切纹理。随着肩部向下俯冲，再结晶晶粒的比例和晶粒尺寸都会增大。通过 CFP 获得的 ZX10 合金的抗压屈服强度提高了 300% 以上，极限抗压强度提高了 60%，这表明 CFP 在镁加工中的应用前景广阔。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Research Proceedings

CiteScore

0.30

自引率

0.00%

发文量