Superplastic Deformation Behavior of 2 mm Ti60 Rolled Sheet in Air Environment

IF 3.4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Advanced Engineering Materials Pub Date : 2024-10-05 DOI:10.1002/adem.202401667

Shulin Dong, Shiwen Qu, Zhiyong Chen, Yingdong Qu, Ruirun Chen, Guanglong Li, Wei Zhang, Shibing Liu

{"title":"Superplastic Deformation Behavior of 2 mm Ti60 Rolled Sheet in Air Environment","authors":"Shulin Dong, Shiwen Qu, Zhiyong Chen, Yingdong Qu, Ruirun Chen, Guanglong Li, Wei Zhang, Shibing Liu","doi":"10.1002/adem.202401667","DOIUrl":null,"url":null,"abstract":"\nThe superplastic deformation behavior of 2 mm Ti60 sheet is studied, and the constitutive equation of superplastic deformation is established. The results show that when the strain rate is 5.00 × 10−3 s−1 and the temperature is 950 °C, the maximum superplastic elongation reaches 400%. Through the analysis of the true strain–true stress curve, it is found that the average apparent activation energy (Q) is 490.783 kJ mol−1 and the average strain rate sensitivity (m) is 0.49. Dynamic spheroidization (DG) promotes the transformation of lath α phase to equiaxed α phase. Dynamic recrystallization (DRX) promotes the generation of high-angle grain boundaries (θ > 15°). After deformation, the strength of R-type textures changes significantly. From the grip to the tip, the strength of R-type texture gradually weakens, which is mainly caused by the rotation of grains during deformation. The deformation mechanism of Ti60 sheet is dominated by grain boundary sliding, and is coordinated by grain growth, DG, DRX, dislocation motion, and grain rotation.","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"26 22","pages":""},"PeriodicalIF":3.4000,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Engineering Materials","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/adem.202401667","RegionNum":3,"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

Abstract

The superplastic deformation behavior of 2 mm Ti60 sheet is studied, and the constitutive equation of superplastic deformation is established. The results show that when the strain rate is 5.00 × 10⁻³ s⁻¹ and the temperature is 950 °C, the maximum superplastic elongation reaches 400%. Through the analysis of the true strain–true stress curve, it is found that the average apparent activation energy (Q) is 490.783 kJ mol⁻¹ and the average strain rate sensitivity (m) is 0.49. Dynamic spheroidization (DG) promotes the transformation of lath α phase to equiaxed α phase. Dynamic recrystallization (DRX) promotes the generation of high-angle grain boundaries (θ > 15°). After deformation, the strength of R-type textures changes significantly. From the grip to the tip, the strength of R-type texture gradually weakens, which is mainly caused by the rotation of grains during deformation. The deformation mechanism of Ti60 sheet is dominated by grain boundary sliding, and is coordinated by grain growth, DG, DRX, dislocation motion, and grain rotation.

查看原文本刊更多论文

2 mm Ti60 轧制板材在空气环境中的超塑性变形行为

研究了 2 mm Ti60 薄板的超塑性变形行为，并建立了超塑性变形的构成方程。结果表明，当应变速率为 5.00 × 10-3 s-1 和温度为 950 ℃ 时，最大超塑性伸长率达到 400%。通过分析真实应变-真实应力曲线，发现平均表观活化能（Q）为 490.783 kJ mol-1，平均应变速率灵敏度（m）为 0.49。动态球化（DG）促进板条α相向等轴α相转变。动态再结晶（DRX）促进了高角度晶界（θ >15°）的产生。变形后，R 型纹理的强度发生了显著变化。从握持处到尖端，R 型纹理的强度逐渐减弱，这主要是由变形过程中晶粒的旋转引起的。Ti60 薄片的变形机制以晶界滑动为主，并与晶粒生长、DG、DRX、位错运动和晶粒旋转相协调。

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

Advanced Engineering Materials 工程技术-材料科学：综合

CiteScore

5.70

自引率

5.60%

发文量

544

审稿时长

1.7 months

期刊介绍： Advanced Engineering Materials is the membership journal of three leading European Materials Societies - German Materials Society/DGM, - French Materials Society/SF2M, - Swiss Materials Federation/SVMT.