时效处理对Al0.7CoCrFeNi高熵合金组织和力学性能的影响

IF 1.5 Q2 ENGINEERING, MULTIDISCIPLINARY

International Journal of Engineering Pub Date : 2023-01-01 DOI:10.5829/ije.2023.36.06c.04

N. Asgarkhani, M. Seifollahi, S. M. Abbasi

{"title":"时效处理对Al0.7CoCrFeNi高熵合金组织和力学性能的影响","authors":"N. Asgarkhani, M. Seifollahi, S. M. Abbasi","doi":"10.5829/ije.2023.36.06c.04","DOIUrl":null,"url":null,"abstract":"In this study, the effects of aging times and temperatures on the microstructure, hardness and compression strength of Al0.7CoCrFeNi high entropy alloy have been investigated. The alloy was cast in a vacuum induction melting furnace, homogenized at 1250 ˚C for 6 h; then aged at 700 to 1000˚C for 2-8 h. The as-cast structure is dendritic and includes FCC(A1) and BCC(A2, B2) phases with the hardness of 497 HV. During ageing, B2 precipitates at the grain boundaries at 700˚C and the hardness increases about 7%. The ratio of BCC to FCC phases on the basis of XRD in as-cast alloy is approximately equal which is increased by ageing at 700˚C. At 800˚C, the formation of a destructive and hard phase of σ cause to increases the hardness to 543 HV and the ratio of (A2+B2)/A1 has decreased. At 1000 ˚C, the ratio of (A2+ B2)/A1 increases, and the peak intensity of σ decreases, so that the hardness","PeriodicalId":14109,"journal":{"name":"International Journal of Engineering","volume":"1 1","pages":""},"PeriodicalIF":1.5000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of Aging Treatment on Microstructure and Mechanical Properties of Al0.7CoCrFeNi High Entropy Alloy\",\"authors\":\"N. Asgarkhani, M. Seifollahi, S. M. Abbasi\",\"doi\":\"10.5829/ije.2023.36.06c.04\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this study, the effects of aging times and temperatures on the microstructure, hardness and compression strength of Al0.7CoCrFeNi high entropy alloy have been investigated. The alloy was cast in a vacuum induction melting furnace, homogenized at 1250 ˚C for 6 h; then aged at 700 to 1000˚C for 2-8 h. The as-cast structure is dendritic and includes FCC(A1) and BCC(A2, B2) phases with the hardness of 497 HV. During ageing, B2 precipitates at the grain boundaries at 700˚C and the hardness increases about 7%. The ratio of BCC to FCC phases on the basis of XRD in as-cast alloy is approximately equal which is increased by ageing at 700˚C. At 800˚C, the formation of a destructive and hard phase of σ cause to increases the hardness to 543 HV and the ratio of (A2+B2)/A1 has decreased. At 1000 ˚C, the ratio of (A2+ B2)/A1 increases, and the peak intensity of σ decreases, so that the hardness\",\"PeriodicalId\":14109,\"journal\":{\"name\":\"International Journal of Engineering\",\"volume\":\"1 1\",\"pages\":\"\"},\"PeriodicalIF\":1.5000,\"publicationDate\":\"2023-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Engineering\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.5829/ije.2023.36.06c.04\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Engineering","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5829/ije.2023.36.06c.04","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

摘要

本文研究了时效时间和时效温度对Al0.7CoCrFeNi高熵合金显微组织、硬度和抗压强度的影响。在真空感应熔炼炉中铸造合金，在1250℃下均匀化6 h;铸态组织为枝晶状，包括FCC(A1)和BCC(A2, B2)相，硬度为497 HV。时效过程中，在700℃时，B2在晶界处析出，硬度提高约7%。在700℃时效后，铸态合金中BCC相与FCC相的比例大致相等。在800℃时，σ相的形成使合金的硬度提高到543 HV， (A2+B2)/A1的比值减小。在1000℃时，(A2+ B2)/A1的比值增大，σ的峰值强度减小

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Effect of Aging Treatment on Microstructure and Mechanical Properties of Al0.7CoCrFeNi High Entropy Alloy

In this study, the effects of aging times and temperatures on the microstructure, hardness and compression strength of Al0.7CoCrFeNi high entropy alloy have been investigated. The alloy was cast in a vacuum induction melting furnace, homogenized at 1250 ˚C for 6 h; then aged at 700 to 1000˚C for 2-8 h. The as-cast structure is dendritic and includes FCC(A1) and BCC(A2, B2) phases with the hardness of 497 HV. During ageing, B2 precipitates at the grain boundaries at 700˚C and the hardness increases about 7%. The ratio of BCC to FCC phases on the basis of XRD in as-cast alloy is approximately equal which is increased by ageing at 700˚C. At 800˚C, the formation of a destructive and hard phase of σ cause to increases the hardness to 543 HV and the ratio of (A2+B2)/A1 has decreased. At 1000 ˚C, the ratio of (A2+ B2)/A1 increases, and the peak intensity of σ decreases, so that the hardness

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

International Journal of Engineering ENGINEERING, MULTIDISCIPLINARY-

自引率

23.10%

发文量

期刊介绍： The objective of the International Journal of Engineering is to provide a forum for communication of information among the world''s scientific and technological community and Iranian scientists and engineers. This journal intends to be of interest and utility to researchers and practitioners in the academic, industrial and governmental sectors. All original research contributions of significant value in all areas of engineering discipline are welcome. This journal is published in two quarterly transactions. Transactions A (Basics) deals with the engineering fundamentals. Transactions B (Applications) are concerned with the application of engineering knowledge in the daily life of the human being and Transactions C (Aspects) - starting from January 2012 - emphasize on the main engineering aspects whose elaboration can yield knowledge and expertise that can equally serve all branches of engineering discipline. This journal will publish authoritative papers on theoretical and experimental researches and advanced applications embodying the results of extensive field, plant, laboratory or theoretical investigation or new interpretations of existing problems. It may also feature - when appropriate - research notes, technical notes, state-of-the-art survey type papers, short communications, letters to the editor, meeting schedules and conference announcements. The language of publication is English. Each paper should contain an abstract both in English and Persian. However, for the authors who are not familiar with Persian language, the publisher will prepare the translations. The abstracts should not exceed 250 words.