{"title":"Effect of Bimodal Quasicrystal Phase on the Dynamic Recrystallization of Mg–Zn–Gd Alloy during High-Pressure Torsion","authors":"Ping Li, Shuangwu Xia, Junfu Dong, Liangwei Dai, Zhicheng Luo, Kemin Xue","doi":"10.1007/s40195-024-01687-z","DOIUrl":null,"url":null,"abstract":"<div><p>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<span>\\(\\overline{1 }\\)</span>0] and fivefold//(0002)<sub>Mg</sub>. 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.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":null,"pages":null},"PeriodicalIF":2.9000,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Metallurgica Sinica-English Letters","FirstCategoryId":"1","ListUrlMain":"https://link.springer.com/article/10.1007/s40195-024-01687-z","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
引用次数: 0
Abstract
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.
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。
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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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