Aasma Tabassum , Wei Xiong , Baoan Sun , Ying Liu , Jing Tao Wang
{"title":"预变形对zr基大块金属玻璃结构和动态弛豫行为的影响","authors":"Aasma Tabassum , Wei Xiong , Baoan Sun , Ying Liu , Jing Tao Wang","doi":"10.1016/j.jnoncrysol.2025.123672","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigates the effects of cold rolling deformation on the structure, free volume, and dynamic relaxation behaviors of a Zr-based bulk metallic glass (BMG). Subsequently, the relaxation enthalpy, free volume, and relaxation behavior of shear bands were extracted using the mixing principle. The results indicate that the relaxation enthalpy and free volume reach 5.09±0.67 kJ/mol and 0.92±0.12 % for the 80 % thickness reduction samples, indicating significant rejuvenation introduced by pre-existing shear bands. The HV hardness of the shear band is just 355±16, about 31.7 % lower than undeformed glassy regions, demonstrating dramatic structural softening in shear regions. The shear band’s relaxation enthalpy and free volume are ∼7.877 kJ/mol and ∼1.42 %. The β relaxation intensity in 80 % deformed samples increases ∼44 % compared to as-cast samples. Moreover, for the shear band, this relaxation intensity almost improves by 80 % respectively, when compared to the as-cast samples.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"666 ","pages":"Article 123672"},"PeriodicalIF":3.2000,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of pre-deformation on structure and dynamic relaxation behavior of a Zr-based bulk metallic glass\",\"authors\":\"Aasma Tabassum , Wei Xiong , Baoan Sun , Ying Liu , Jing Tao Wang\",\"doi\":\"10.1016/j.jnoncrysol.2025.123672\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This study investigates the effects of cold rolling deformation on the structure, free volume, and dynamic relaxation behaviors of a Zr-based bulk metallic glass (BMG). Subsequently, the relaxation enthalpy, free volume, and relaxation behavior of shear bands were extracted using the mixing principle. The results indicate that the relaxation enthalpy and free volume reach 5.09±0.67 kJ/mol and 0.92±0.12 % for the 80 % thickness reduction samples, indicating significant rejuvenation introduced by pre-existing shear bands. The HV hardness of the shear band is just 355±16, about 31.7 % lower than undeformed glassy regions, demonstrating dramatic structural softening in shear regions. The shear band’s relaxation enthalpy and free volume are ∼7.877 kJ/mol and ∼1.42 %. The β relaxation intensity in 80 % deformed samples increases ∼44 % compared to as-cast samples. Moreover, for the shear band, this relaxation intensity almost improves by 80 % respectively, when compared to the as-cast samples.</div></div>\",\"PeriodicalId\":16461,\"journal\":{\"name\":\"Journal of Non-crystalline Solids\",\"volume\":\"666 \",\"pages\":\"Article 123672\"},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2025-06-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Non-crystalline Solids\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S002230932500287X\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Non-crystalline Solids","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S002230932500287X","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Effect of pre-deformation on structure and dynamic relaxation behavior of a Zr-based bulk metallic glass
This study investigates the effects of cold rolling deformation on the structure, free volume, and dynamic relaxation behaviors of a Zr-based bulk metallic glass (BMG). Subsequently, the relaxation enthalpy, free volume, and relaxation behavior of shear bands were extracted using the mixing principle. The results indicate that the relaxation enthalpy and free volume reach 5.09±0.67 kJ/mol and 0.92±0.12 % for the 80 % thickness reduction samples, indicating significant rejuvenation introduced by pre-existing shear bands. The HV hardness of the shear band is just 355±16, about 31.7 % lower than undeformed glassy regions, demonstrating dramatic structural softening in shear regions. The shear band’s relaxation enthalpy and free volume are ∼7.877 kJ/mol and ∼1.42 %. The β relaxation intensity in 80 % deformed samples increases ∼44 % compared to as-cast samples. Moreover, for the shear band, this relaxation intensity almost improves by 80 % respectively, when compared to the as-cast samples.
期刊介绍:
The Journal of Non-Crystalline Solids publishes review articles, research papers, and Letters to the Editor on amorphous and glassy materials, including inorganic, organic, polymeric, hybrid and metallic systems. Papers on partially glassy materials, such as glass-ceramics and glass-matrix composites, and papers involving the liquid state are also included in so far as the properties of the liquid are relevant for the formation of the solid.
In all cases the papers must demonstrate both novelty and importance to the field, by way of significant advances in understanding or application of non-crystalline solids; in the case of Letters, a compelling case must also be made for expedited handling.