{"title":"微合金化对铜-铬-铌合金性能和铬析出物热稳定性的影响","authors":"","doi":"10.1016/j.matchar.2024.114426","DOIUrl":null,"url":null,"abstract":"<div><div>The Cu-Cr-Nb alloy's high-temperature property is well known for the heat-sink application in rocket engine combustion chambers. Effects of Ti, Si, and Co microalloying elements on the microstructure and mechanical properties at high temperatures were investigated in detail. Cu-Cr-Nb alloy ingots were prepared using the atmospheric melting method and the growth rate of Cr precipitates in the studied alloys was explored. After aging at 450 °C for 60 min, the tensile strengths of Cu-2.6Cr-0.9Nb-0.15Ti (at. %) alloy were measured as follows: 468 MPa at 20 °C, 318 MPa at 400 °C, 281 MPa at 450 °C, 238 MPa at 500 °C, 187 MPa at 550 °C, and 140 MPa at 600 °C. The addition of trace Ti element effectively reduced the growth rate of Cr precipitates during high-temperature strain and contributed to the high-temperature mechanical properties. These findings are meaningful in developing high-strength Cu–Cr–Nb alloys at high temperatures.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":null,"pages":null},"PeriodicalIF":4.8000,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of microalloying on the properties and Cr precipitate thermal stability of Cu-Cr-Nb alloys\",\"authors\":\"\",\"doi\":\"10.1016/j.matchar.2024.114426\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The Cu-Cr-Nb alloy's high-temperature property is well known for the heat-sink application in rocket engine combustion chambers. Effects of Ti, Si, and Co microalloying elements on the microstructure and mechanical properties at high temperatures were investigated in detail. Cu-Cr-Nb alloy ingots were prepared using the atmospheric melting method and the growth rate of Cr precipitates in the studied alloys was explored. After aging at 450 °C for 60 min, the tensile strengths of Cu-2.6Cr-0.9Nb-0.15Ti (at. %) alloy were measured as follows: 468 MPa at 20 °C, 318 MPa at 400 °C, 281 MPa at 450 °C, 238 MPa at 500 °C, 187 MPa at 550 °C, and 140 MPa at 600 °C. The addition of trace Ti element effectively reduced the growth rate of Cr precipitates during high-temperature strain and contributed to the high-temperature mechanical properties. These findings are meaningful in developing high-strength Cu–Cr–Nb alloys at high temperatures.</div></div>\",\"PeriodicalId\":18727,\"journal\":{\"name\":\"Materials Characterization\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.8000,\"publicationDate\":\"2024-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Characterization\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1044580324008076\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, CHARACTERIZATION & TESTING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Characterization","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1044580324008076","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CHARACTERIZATION & TESTING","Score":null,"Total":0}
引用次数: 0
摘要
众所周知,Cu-Cr-Nb 合金的高温性能主要用于火箭发动机燃烧室的散热器。研究人员详细探讨了 Ti、Si 和 Co 微合金元素对高温下微观结构和机械性能的影响。采用常压熔炼法制备了 Cu-Cr-Nb 合金铸锭,并探讨了所研究合金中铬析出物的生长率。Cu-2.6Cr-0.9Nb-0.15Ti (at. %) 合金在 450 °C 下老化 60 分钟后,拉伸强度的测量结果如下:20 °C 时为 468 MPa,400 °C 时为 318 MPa,450 °C 时为 281 MPa,500 °C 时为 238 MPa,550 °C 时为 187 MPa,600 °C 时为 140 MPa。痕量钛元素的添加有效地降低了高温应变过程中铬析出物的增长速度,有助于提高高温机械性能。这些发现对开发高温下的高强度 Cu-Cr-Nb 合金很有意义。
Effect of microalloying on the properties and Cr precipitate thermal stability of Cu-Cr-Nb alloys
The Cu-Cr-Nb alloy's high-temperature property is well known for the heat-sink application in rocket engine combustion chambers. Effects of Ti, Si, and Co microalloying elements on the microstructure and mechanical properties at high temperatures were investigated in detail. Cu-Cr-Nb alloy ingots were prepared using the atmospheric melting method and the growth rate of Cr precipitates in the studied alloys was explored. After aging at 450 °C for 60 min, the tensile strengths of Cu-2.6Cr-0.9Nb-0.15Ti (at. %) alloy were measured as follows: 468 MPa at 20 °C, 318 MPa at 400 °C, 281 MPa at 450 °C, 238 MPa at 500 °C, 187 MPa at 550 °C, and 140 MPa at 600 °C. The addition of trace Ti element effectively reduced the growth rate of Cr precipitates during high-temperature strain and contributed to the high-temperature mechanical properties. These findings are meaningful in developing high-strength Cu–Cr–Nb alloys at high temperatures.
期刊介绍:
Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials.
The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal.
The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include:
Metals & Alloys
Ceramics
Nanomaterials
Biomedical materials
Optical materials
Composites
Natural Materials.