通过弹塑性相场模拟深入了解γʹ强化钴基超合金蠕变过程中的元素偏析机制

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International Pub Date : 2024-10-01 DOI:10.1016/j.pnsc.2024.05.013

Jia Chen, Min Guo, Min Yang, Tingting Cui, Borong Cui, Jun Zhang

{"title":"通过弹塑性相场模拟深入了解γʹ强化钴基超合金蠕变过程中的元素偏析机制","authors":"Jia Chen, Min Guo, Min Yang, Tingting Cui, Borong Cui, Jun Zhang","doi":"10.1016/j.pnsc.2024.05.013","DOIUrl":null,"url":null,"abstract":"<div><div><span>The element segregation accompanying the creep process has been shown to significantly affect the deformation resistance of the </span>superalloys<span>. However, the processing and mechanism of element segregation are still unclear. This paper investigated the concentration evolution of a model Co–9Al–9W (at. %) alloy during 900 °C/275 MPa using developed ternary elastoplastic phase-field model coupled with CALPHAD method and crystal plasticity<span> model. The results of simulation show that co-depletion of Al and W element occurs in γʹ precipitate and in γ side at γ/γʹ interface, and this depletion is gradually increasing with the accumulation of plastic strain. From the perspective of changes of driving force of element diffusion, it is found that these segregation phenomena are attributed to the high elastic potential caused by the large local plastic strain. In addition, the effects of these segregations on creep property are also predicted. The current research provides a new method for exploring the mechanism of element diffusion.</span></span></div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":"34 5","pages":"Pages 873-879"},"PeriodicalIF":4.8000,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Insight into element segregation mechanisms during creep in γʹ-strengthened Co-based superalloy by elastoplastic phase-field simulation\",\"authors\":\"Jia Chen, Min Guo, Min Yang, Tingting Cui, Borong Cui, Jun Zhang\",\"doi\":\"10.1016/j.pnsc.2024.05.013\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div><span>The element segregation accompanying the creep process has been shown to significantly affect the deformation resistance of the </span>superalloys<span>. However, the processing and mechanism of element segregation are still unclear. This paper investigated the concentration evolution of a model Co–9Al–9W (at. %) alloy during 900 °C/275 MPa using developed ternary elastoplastic phase-field model coupled with CALPHAD method and crystal plasticity<span> model. The results of simulation show that co-depletion of Al and W element occurs in γʹ precipitate and in γ side at γ/γʹ interface, and this depletion is gradually increasing with the accumulation of plastic strain. From the perspective of changes of driving force of element diffusion, it is found that these segregation phenomena are attributed to the high elastic potential caused by the large local plastic strain. In addition, the effects of these segregations on creep property are also predicted. The current research provides a new method for exploring the mechanism of element diffusion.</span></span></div></div>\",\"PeriodicalId\":20742,\"journal\":{\"name\":\"Progress in Natural Science: Materials International\",\"volume\":\"34 5\",\"pages\":\"Pages 873-879\"},\"PeriodicalIF\":4.8000,\"publicationDate\":\"2024-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Progress in Natural Science: Materials International\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1002007124001357\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Progress in Natural Science: Materials International","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1002007124001357","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

摘要

蠕变过程中的元素偏析已被证明会严重影响超合金的抗变形能力。然而，元素偏析的加工过程和机理仍不清楚。本文使用开发的三元弹塑性相场模型，结合 CALPHAD 方法和晶体塑性模型，研究了模型 Co-9Al-9W (at. %) 合金在 900 °C/275 MPa 时的浓度演变。模拟结果表明，在γʹ沉淀和γ/γʹ界面的γ侧发生了铝元素和 W 元素的共耗损，并且这种耗损随着塑性应变的积累而逐渐增加。从元素扩散驱动力变化的角度看，这些偏析现象是由于局部塑性应变大而产生的高弹性势能造成的。此外，还预测了这些偏析对蠕变特性的影响。目前的研究为探索元素扩散机理提供了一种新方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Insight into element segregation mechanisms during creep in γʹ-strengthened Co-based superalloy by elastoplastic phase-field simulation

查看原文本刊更多论文

Insight into element segregation mechanisms during creep in γʹ-strengthened Co-based superalloy by elastoplastic phase-field simulation

The element segregation accompanying the creep process has been shown to significantly affect the deformation resistance of the superalloys. However, the processing and mechanism of element segregation are still unclear. This paper investigated the concentration evolution of a model Co–9Al–9W (at. %) alloy during 900 °C/275 MPa using developed ternary elastoplastic phase-field model coupled with CALPHAD method and crystal plasticity model. The results of simulation show that co-depletion of Al and W element occurs in γʹ precipitate and in γ side at γ/γʹ interface, and this depletion is gradually increasing with the accumulation of plastic strain. From the perspective of changes of driving force of element diffusion, it is found that these segregation phenomena are attributed to the high elastic potential caused by the large local plastic strain. In addition, the effects of these segregations on creep property are also predicted. The current research provides a new method for exploring the mechanism of element diffusion.

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

Progress in Natural Science: Materials International 综合性期刊-综合性期刊

CiteScore

8.60

自引率

2.10%

发文量

2812

审稿时长

49 days

期刊介绍： Progress in Natural Science: Materials International provides scientists and engineers throughout the world with a central vehicle for the exchange and dissemination of basic theoretical studies and applied research of advanced materials. The emphasis is placed on original research, both analytical and experimental, which is of permanent interest to engineers and scientists, covering all aspects of new materials and technologies, such as, energy and environmental materials; advanced structural materials; advanced transportation materials, functional and electronic materials; nano-scale and amorphous materials; health and biological materials; materials modeling and simulation; materials characterization; and so on. The latest research achievements and innovative papers in basic theoretical studies and applied research of material science will be carefully selected and promptly reported. Thus, the aim of this Journal is to serve the global materials science and technology community with the latest research findings. As a service to readers, an international bibliography of recent publications in advanced materials is published bimonthly.