Renjie Dai
(, ), Zhenjun Zhang
(, ), Rui Liu
(, ), Jiapeng Hou
(, ), Baishan Gong
(, ), Zhenkai Zhao
(, ), Zhenyu Liu
(, ), Zongyi Ma
(, ), Zhefeng Zhang
(, )
{"title":"强化对7xxx铝合金疲劳强度的双刃效应","authors":"Renjie Dai \n (, ), Zhenjun Zhang \n (, ), Rui Liu \n (, ), Jiapeng Hou \n (, ), Baishan Gong \n (, ), Zhenkai Zhao \n (, ), Zhenyu Liu \n (, ), Zongyi Ma \n (, ), Zhefeng Zhang \n (, )","doi":"10.1007/s40843-025-3466-1","DOIUrl":null,"url":null,"abstract":"<div><p>The relationship between tensile and fatigue properties in Al alloys remains vague because strengthening often affects the fatigue damage in many aspects. In this study, 7xxx Al alloys were strengthened solely by varying the precipitate content while keeping both the overall microstructure and damage mechanisms consistent, so as to examine the intrinsic effect of strengthening on its fatigue performance. The results show that there was an increment of 100 MPa in tensile strength, while the fatigue strength remained nearly unchanged. Further analysis indicates that the strengthening had a dual-edged effect, that is, strengthening enhanced the whole resistance to plastic deformation, while also causing the strain localization. Combining our previous models associated with the tensile and fatigue properties, a relationship between yield and fatigue strengths is established, which shows a first increasing and then declining trend in the fatigue strength with increasing the yield strength, leaving a relatively stable region in between, which explains the plateau phenomenon of fatigue strength in a middle yield strength range for the high-strength 7xxx alloys.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":"68 8","pages":"2783 - 2791"},"PeriodicalIF":7.4000,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Dual-edged effect of strengthening on fatigue strength in 7xxx Al alloys\",\"authors\":\"Renjie Dai \\n (, ), Zhenjun Zhang \\n (, ), Rui Liu \\n (, ), Jiapeng Hou \\n (, ), Baishan Gong \\n (, ), Zhenkai Zhao \\n (, ), Zhenyu Liu \\n (, ), Zongyi Ma \\n (, ), Zhefeng Zhang \\n (, )\",\"doi\":\"10.1007/s40843-025-3466-1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The relationship between tensile and fatigue properties in Al alloys remains vague because strengthening often affects the fatigue damage in many aspects. In this study, 7xxx Al alloys were strengthened solely by varying the precipitate content while keeping both the overall microstructure and damage mechanisms consistent, so as to examine the intrinsic effect of strengthening on its fatigue performance. The results show that there was an increment of 100 MPa in tensile strength, while the fatigue strength remained nearly unchanged. Further analysis indicates that the strengthening had a dual-edged effect, that is, strengthening enhanced the whole resistance to plastic deformation, while also causing the strain localization. Combining our previous models associated with the tensile and fatigue properties, a relationship between yield and fatigue strengths is established, which shows a first increasing and then declining trend in the fatigue strength with increasing the yield strength, leaving a relatively stable region in between, which explains the plateau phenomenon of fatigue strength in a middle yield strength range for the high-strength 7xxx alloys.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":773,\"journal\":{\"name\":\"Science China Materials\",\"volume\":\"68 8\",\"pages\":\"2783 - 2791\"},\"PeriodicalIF\":7.4000,\"publicationDate\":\"2025-07-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Science China Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s40843-025-3466-1\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Science China Materials","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s40843-025-3466-1","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Dual-edged effect of strengthening on fatigue strength in 7xxx Al alloys
The relationship between tensile and fatigue properties in Al alloys remains vague because strengthening often affects the fatigue damage in many aspects. In this study, 7xxx Al alloys were strengthened solely by varying the precipitate content while keeping both the overall microstructure and damage mechanisms consistent, so as to examine the intrinsic effect of strengthening on its fatigue performance. The results show that there was an increment of 100 MPa in tensile strength, while the fatigue strength remained nearly unchanged. Further analysis indicates that the strengthening had a dual-edged effect, that is, strengthening enhanced the whole resistance to plastic deformation, while also causing the strain localization. Combining our previous models associated with the tensile and fatigue properties, a relationship between yield and fatigue strengths is established, which shows a first increasing and then declining trend in the fatigue strength with increasing the yield strength, leaving a relatively stable region in between, which explains the plateau phenomenon of fatigue strength in a middle yield strength range for the high-strength 7xxx alloys.
期刊介绍：
Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
