Influence of γʹ volume fraction on creep of Ni-based superalloy through phase-field simulations

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2025-04-01 DOI:10.1016/S1003-6326(24)66741-5

Min YANG, Fan YANG, Jia CHEN, Min GUO, Hai-jun SU, Jun ZHANG

{"title":"Influence of γʹ volume fraction on creep of Ni-based superalloy through phase-field simulations","authors":"Min YANG, Fan YANG, Jia CHEN, Min GUO, Hai-jun SU, Jun ZHANG","doi":"10.1016/S1003-6326(24)66741-5","DOIUrl":null,"url":null,"abstract":"<div><div>γʹ volume fraction (fv) plays a critical role in the mechanical properties of Ni-based single-crystal superalloys. A creep phase-field model is utilized to simulate the microstructure evolution and creep performance during creep under different fv conditions. The influence mechanism of fv on creep properties is investigated based on the analysis of evolutions of internal stress and strain fields. As fv increases, the morphology of γʹ rafts changes from discontinuous to continuous, while the morphological change of γ channels is opposite, the inclination of γ channels from the [010] direction to 〈011〉 directions during tertiary creep first decreases and then increases, the creep life first increases and then decreases, and the main distribution of creep damage shifts from γʹ to γʹ/γ interfaces and γ channels. The longest creep life under fv of 0.65 can be attributed to the stable γʹ raft structure, the lowest stress and strain in γ channels, and the slowest damage accumulation.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 4","pages":"Pages 1168-1181"},"PeriodicalIF":4.7000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transactions of Nonferrous Metals Society of China","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1003632624667415","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}

引用次数: 0

Abstract

γʹ volume fraction (f_v) plays a critical role in the mechanical properties of Ni-based single-crystal superalloys. A creep phase-field model is utilized to simulate the microstructure evolution and creep performance during creep under different f_v conditions. The influence mechanism of f_v on creep properties is investigated based on the analysis of evolutions of internal stress and strain fields. As f_v increases, the morphology of γʹ rafts changes from discontinuous to continuous, while the morphological change of γ channels is opposite, the inclination of γ channels from the [010] direction to 〈011〉 directions during tertiary creep first decreases and then increases, the creep life first increases and then decreases, and the main distribution of creep damage shifts from γʹ to γʹ/γ interfaces and γ channels. The longest creep life under f_v of 0.65 can be attributed to the stable γʹ raft structure, the lowest stress and strain in γ channels, and the slowest damage accumulation.

查看原文本刊更多论文

相场模拟γ′体积分数对ni基高温合金蠕变的影响

γ′体积分数（fv）对ni基单晶高温合金的力学性能起着至关重要的作用。采用蠕变相场模型模拟了不同温度条件下蠕变过程中的微观结构演变和蠕变性能。在分析内部应力场和应变场演化的基础上，探讨了fv对蠕变性能的影响机理。随着fv的增大，γ′筏的形态由不连续变为连续，而γ′通道的形态变化与之相反，第三系蠕变过程中，γ′通道从[010]方向向< 011 >方向的倾角先减小后增大，蠕变寿命先增大后减小，蠕变损伤的主要分布从γ′向γ′/γ界面和γ′通道转移。在fv为0.65时，稳定的γ +木筏结构、γ通道内的应力应变最小、损伤积累最慢，具有最长的蠕变寿命。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.