{"title":"一种具有出色强度-延展性协同作用的新型六方紧密堆积高熵合金","authors":"Li-dan Qu, Jia-qiang Ni, Xiao-dan Li, Xiao-nan Wang, Bing-zhi Chen","doi":"10.1166/sam.2024.4579","DOIUrl":null,"url":null,"abstract":"Refractory high-entropy alloys (HEAs) are new potential candidates in high temperature applications. However, most present refractory HEAs are single-phase body-centered cubic (BCC) structure, which is brittle at room temperature. Then strategies to ductile the refractory HEAs and maintain\n their good high temperature strength at the same time should be under consideration. In the present study, a novel WReOsIr HEA with hexagonal close-packed (HCP) structure was developed. This alloy not only has excellent high-temperature strength (416.7 MPa at 1473 K), but also exhibits good\n ductility (30.7%) at room temperature. The better room temperature plasticity is found to originate from the deformation twins formed inside the grains.","PeriodicalId":21671,"journal":{"name":"Science of Advanced Materials","volume":null,"pages":null},"PeriodicalIF":0.9000,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A Novel Hexagonal Close-Packed High-Entropy Alloy with Outstanding Strength-Ductility Synergy\",\"authors\":\"Li-dan Qu, Jia-qiang Ni, Xiao-dan Li, Xiao-nan Wang, Bing-zhi Chen\",\"doi\":\"10.1166/sam.2024.4579\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Refractory high-entropy alloys (HEAs) are new potential candidates in high temperature applications. However, most present refractory HEAs are single-phase body-centered cubic (BCC) structure, which is brittle at room temperature. Then strategies to ductile the refractory HEAs and maintain\\n their good high temperature strength at the same time should be under consideration. In the present study, a novel WReOsIr HEA with hexagonal close-packed (HCP) structure was developed. This alloy not only has excellent high-temperature strength (416.7 MPa at 1473 K), but also exhibits good\\n ductility (30.7%) at room temperature. The better room temperature plasticity is found to originate from the deformation twins formed inside the grains.\",\"PeriodicalId\":21671,\"journal\":{\"name\":\"Science of Advanced Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.9000,\"publicationDate\":\"2024-03-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Science of Advanced Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1166/sam.2024.4579\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Science of Advanced Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1166/sam.2024.4579","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
难熔高熵合金(HEAs)是高温应用领域中新的潜在候选材料。然而,目前大多数耐火高熵合金都是单相体心立方(BCC)结构,在室温下比较脆。因此,应考虑如何使耐火 HEA 具有延展性,同时保持其良好的高温强度。本研究开发了一种具有六方紧密堆积(HCP)结构的新型 WReOsIr HEA。这种合金不仅具有出色的高温强度(1473 K 时为 416.7 兆帕),而且在室温下也表现出良好的延展性(30.7%)。更好的室温塑性源于晶粒内部形成的变形孪晶。
A Novel Hexagonal Close-Packed High-Entropy Alloy with Outstanding Strength-Ductility Synergy
Refractory high-entropy alloys (HEAs) are new potential candidates in high temperature applications. However, most present refractory HEAs are single-phase body-centered cubic (BCC) structure, which is brittle at room temperature. Then strategies to ductile the refractory HEAs and maintain
their good high temperature strength at the same time should be under consideration. In the present study, a novel WReOsIr HEA with hexagonal close-packed (HCP) structure was developed. This alloy not only has excellent high-temperature strength (416.7 MPa at 1473 K), but also exhibits good
ductility (30.7%) at room temperature. The better room temperature plasticity is found to originate from the deformation twins formed inside the grains.