Qianqian Ren, Xianjing Deng, Zhiqiang Ru, Ming Liu, Zhimin Pi, Lili Wei, Hongfeng Huang, Degui Li
{"title":"微量Sc对7085合金时效析出及疲劳裂纹扩展行为的影响","authors":"Qianqian Ren, Xianjing Deng, Zhiqiang Ru, Ming Liu, Zhimin Pi, Lili Wei, Hongfeng Huang, Degui Li","doi":"10.1111/ffe.14614","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>In this work, the effects of Sc-alloying and aging treatments, including T6 peak-aging and retrogression with reaging (RRA) on the fatigue crack propagation (FCP) behavior of 7085 alloy, were investigated. The results show that the RRA-treated alloy exhibits high volume fraction of larger sharable <i>η</i>′ phases, wider precipitate free zone (PFZ), and high Schmid factor. These microstructures contribute to frequent transgranular propagation, increasement of <i>ΔK</i><sub><i>th</i></sub>, and higher FCP resistance than T6-treated alloy. Sc alloying can significantly refine grain structure, inhibit recrystallization, and accelerate the nucleation of <i>η</i>′ strengthening phase, thus improving the mechanical properties of 7085 alloy. However, Sc alloying also tends to induce the occurrence of intergranular propagation due to presence of microscale AlZnMgCuSc phase and fine grain structure with high grain boundary volume fraction. Therefore, Sc alloying plays a negative role in improving the FCP resistance of 7085 alloy.</p>\n </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 5","pages":"2221-2240"},"PeriodicalIF":3.1000,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of Trace Sc Addition on Aging Precipitation and Fatigue Crack Propagation Behavior of 7085 Alloy\",\"authors\":\"Qianqian Ren, Xianjing Deng, Zhiqiang Ru, Ming Liu, Zhimin Pi, Lili Wei, Hongfeng Huang, Degui Li\",\"doi\":\"10.1111/ffe.14614\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n <p>In this work, the effects of Sc-alloying and aging treatments, including T6 peak-aging and retrogression with reaging (RRA) on the fatigue crack propagation (FCP) behavior of 7085 alloy, were investigated. The results show that the RRA-treated alloy exhibits high volume fraction of larger sharable <i>η</i>′ phases, wider precipitate free zone (PFZ), and high Schmid factor. These microstructures contribute to frequent transgranular propagation, increasement of <i>ΔK</i><sub><i>th</i></sub>, and higher FCP resistance than T6-treated alloy. Sc alloying can significantly refine grain structure, inhibit recrystallization, and accelerate the nucleation of <i>η</i>′ strengthening phase, thus improving the mechanical properties of 7085 alloy. However, Sc alloying also tends to induce the occurrence of intergranular propagation due to presence of microscale AlZnMgCuSc phase and fine grain structure with high grain boundary volume fraction. Therefore, Sc alloying plays a negative role in improving the FCP resistance of 7085 alloy.</p>\\n </div>\",\"PeriodicalId\":12298,\"journal\":{\"name\":\"Fatigue & Fracture of Engineering Materials & Structures\",\"volume\":\"48 5\",\"pages\":\"2221-2240\"},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2025-02-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Fatigue & Fracture of Engineering Materials & Structures\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1111/ffe.14614\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fatigue & Fracture of Engineering Materials & Structures","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/ffe.14614","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
Effect of Trace Sc Addition on Aging Precipitation and Fatigue Crack Propagation Behavior of 7085 Alloy
In this work, the effects of Sc-alloying and aging treatments, including T6 peak-aging and retrogression with reaging (RRA) on the fatigue crack propagation (FCP) behavior of 7085 alloy, were investigated. The results show that the RRA-treated alloy exhibits high volume fraction of larger sharable η′ phases, wider precipitate free zone (PFZ), and high Schmid factor. These microstructures contribute to frequent transgranular propagation, increasement of ΔKth, and higher FCP resistance than T6-treated alloy. Sc alloying can significantly refine grain structure, inhibit recrystallization, and accelerate the nucleation of η′ strengthening phase, thus improving the mechanical properties of 7085 alloy. However, Sc alloying also tends to induce the occurrence of intergranular propagation due to presence of microscale AlZnMgCuSc phase and fine grain structure with high grain boundary volume fraction. Therefore, Sc alloying plays a negative role in improving the FCP resistance of 7085 alloy.
期刊介绍：
Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.
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