多道次热拉Mg-Gd-Y-Zn-Zr合金丝的组织与力学性能

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-07-18 DOI:10.1016/j.jallcom.2025.182348

Kaipeng Yang, Kai Ma, Wenxiang Xu, Liqing Wang, Zhen Zhang, Yunlong Li, Zhiquan Huang, Zhanyong Zhao, Peikang Bai, Jibo Hou, Fude Wang

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引用次数: 0

摘要

研究了Mg-8.5Gd-4Y-2Zn-0.3Zr合金丝在多道次热拉伸过程中的晶粒取向演变、第二相及其对力学性能的影响。将Φ6 mm挤压Mg-8.5Gd-4Y-2Zn-0.3Zr合金棒材在450℃下经多道次热拉伸加工成Φ1.45 mm线材。在拉伸过程中，晶间18R-LPSO相由块状形态转变为破碎条状形态。平均晶粒尺寸从7.83 μm略微减小到7.44 μm。最初弱的<；0001>；//ED异常织构和强的<；01-10>；//ED织构逐渐转变为强的<；01-10>；//DD基底织构。最终Φ1.45 mm丝的抗拉强度为495 MPa，屈服强度为447 MPa，伸长率为2.41%，与初始状态相比，强度有显著提高。计算表明，晶界强化、位错强化和18R-LPSO相强化共同作用于屈服强度。18R-LPSO相强化被确定为主要机制。

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Microstructure and mechanical properties of multi-pass hot-drawn Mg-Gd-Y-Zn-Zr alloy wires

This work investigates the grain orientation evolution, second phase, and their influence on the mechanical properties of Mg-8.5Gd-4Y-2Zn-0.3Zr alloy wires during multi-pass hot drawing. A Φ6 mm extruded Mg-8.5Gd-4Y-2Zn-0.3Zr alloy rod was processed into a Φ1.45 mm wire via multi-pass hot drawing at 450°C. During the drawing process, the intergranular 18R-LPSO phase transformed from a block-shaped morphology to fragmented strip-shaped morphology. The average grain size decreased slightly from 7.83 μm to 7.44 μm. Initially weak <0001>//ED anomalous texture and strong <01-10>//ED texture gradually transformed the strong <01-10>//DD basal texture. The final Φ1.45 mm wire exhibited a tensile strength of 495 MPa, yield strength of 447 MPa, and elongation of 2.41%, demonstrating significant strength enhancement compared to the initial state. Calculations revealed that grain boundary strengthening, dislocation strengthening, and 18R-LPSO phase strengthening contributed collectively to yield strength. The 18R-LPSO phase strengthening identified as the dominant mechanism.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.