高压扭转过程中双模准晶相对镁锌钆合金动态再结晶的影响

IF 2.9 2区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING
Ping Li, Shuangwu Xia, Junfu Dong, Liangwei Dai, Zhicheng Luo, Kemin Xue
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引用次数: 0

摘要

通过高压扭转(HPT)加工了具有准晶二十面体相的镁锌钆合金。透射电子显微镜分析了双峰 I 相对动态再结晶的影响。结果表明,块状 I 相能刺激明显的颗粒刺激成核,高压扭转(HPT)5 圈后优先形成动态再结晶(DRX)晶粒,而粒状 I 相仅能促进亚晶粒的生成。取向关系被确定为2倍//[12/(overline{1 }/)0]和5倍//(0002)Mg。此外,HPT 9 圈后,块 I 相诱导的 DRX 晶粒出现长大和粗化。与块状 I 相相比,粒状 I 相诱导的晶粒由于具有很强的针刺效应,尺寸要小得多,分布也更均匀。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Effect of Bimodal Quasicrystal Phase on the Dynamic Recrystallization of Mg–Zn–Gd Alloy during High-Pressure Torsion

Effect of Bimodal Quasicrystal Phase on the Dynamic Recrystallization of Mg–Zn–Gd Alloy during High-Pressure Torsion

The Mg–Zn–Gd alloy with quasicrystal icosahedral phase was processed by high-pressure torsion (HPT). The effect of bimodal I-phase on the dynamic recrystallization was analyzed by transmission electron microscopy. The results showed that the block I-phase can stimulate obvious particle-stimulated nucleation and dynamic recrystallization (DRX) grains were preferentially formed after HPT for 5 turns, while the granular I-phase only promoted the generation of sub-grains. The orientation relationship was determined as twofold//[12\(\overline{1 }\)0] and fivefold//(0002)Mg. Moreover, after HPT for 9 turns, the DRX grains induced by block I-phase appeared to grow up and coarsened. Compared with block I-phase, the grains induced by granular I-phase presented much smaller size and distributed more homogeneous due to the strong pinning effect.

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来源期刊
Acta Metallurgica Sinica-English Letters
Acta Metallurgica Sinica-English Letters METALLURGY & METALLURGICAL ENGINEERING-
CiteScore
6.60
自引率
14.30%
发文量
122
审稿时长
2 months
期刊介绍: This international journal presents compact reports of significant, original and timely research reflecting progress in metallurgy, materials science and engineering, including materials physics, physical metallurgy, and process metallurgy.
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