HST2425钛合金动态力学行为及本构模型

doi:10.13251/j.issn.0254-6051.2023.01.015

金属热处理 ›› 2023, Vol. 48 ›› Issue (1): 87-94.DOI: 10.13251/j.issn.0254-6051.2023.01.015

HST2425钛合金动态力学行为及本构模型

郭峰挺¹, 丛良超², 郭新虎², 杜菲菲², 孙旭东^1,3

1.东北大学材料科学与工程学院材料各向异性与织构教育部重点实验室, 辽宁沈阳 100819;
2.沈阳中钛装备制造有限公司, 辽宁沈阳 110020;
3.东北大学佛山研究生院, 广东佛山 528311

收稿日期:2022-08-16 修回日期:2022-11-04 出版日期:2023-01-25 发布日期:2023-02-03
通讯作者: 孙旭东,教授,E-mail:xdsun@mail.neu.edu.cn
作者简介:郭峰挺(1997—),男,硕士研究生,主要研究方向为高性能钛合金,E-mail:1448716709@qq.com。

Dynamic mechanical behavior and constitutive model of HST2425 titanium alloy

Guo Fengting¹, Cong Liangchao², Guo Xinhu², Du Feifei², Sun Xudong^1,3

1. Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang Liaoning 110819, China;
2. Shenyang Zhongtai Equipment Manufacture Corporation Ltd., Shenyang Liaoning 110020, China;
3. Foshan Graduate School, Northeastern University, Foshan Guangdong 528311, China

Received:2022-08-16 Revised:2022-11-04 Online:2023-01-25 Published:2023-02-03

摘要/Abstract

摘要： 使用电子万能试验机和分离式霍普金森杆装置(SHPB)研究了HST2425钛合金在温度为293~673 K、应变速率为0.0001~6500 s^-1下的准静态和动态力学性能。结果表明,HST2425钛合金的最大应力和最大应变均随应变速率的增大而增加,但是应变速率超过3500 s^-1后最大应力的增加程度降低,在应变速率超过5500 s^-1后最大应变的增加程度也降低。随变形温度的升高,流变应力显著降低,并且温度和应变速率在动态压缩过程中具有交互作用。根据试验结果建立了HST2425钛合金的原始Johnson-Cook(J-C) 模型及其修正模型,且修正模型与试验值的相关性比原始模型更好,表明修正模型在预测HST2425钛合金动态冲击变形行为方面具有更高的准确性和适用性。

关键词: HST2425钛合金, Johnson-Cook本构模型, 动态力学行为, 应变速率

Abstract: Quasi-static and dynamic mechanical properties of HST2425 titanium alloy at temperatures ranging from 293 K to 673 K and strain rates ranging from 0.0001 s^-1 to 6500 s^-1 were investigated by using an electronic universal testing machine and Split Hopkinson bar (SHPB) device. The results show that with the increase of strain rate, both the maximum stress and maximum strain of the HST2425 titanium alloy increase, but the increase rate of maximum stress decreases when the strain rate exceeds 3500 s^-1, but the increase rate of maximum stress decreases when the strain rate exceeds 3500 s^-1, and the increase rate of maximum strain decreases when the strain rate exceeds 5500 s^-1. As the deformation temperature increases, the flow stress decreases significantly, and the temperature and strain rate have an interaction in the dynamic compression process. The original Johnson-Cook (J-C) model and its modified model of the HST2425 titanium alloy are established based on the experimental results, and the correlation between the modified model and the experimental values is better than the original model, indicating that the modified model has higher accuracy and applicability in predicting the dynamic impact deformation behavior of the HST2425 titanium alloy.

Key words: HST2425 titanium alloy, Johnson-Cook constitutive model, dynamic mechanical behavior, strain rate

中图分类号:

TG146.2

郭峰挺, 丛良超, 郭新虎, 杜菲菲, 孙旭东. HST2425钛合金动态力学行为及本构模型[J]. 金属热处理, 2023, 48(1): 87-94.

Guo Fengting, Cong Liangchao, Guo Xinhu, Du Feifei, Sun Xudong. Dynamic mechanical behavior and constitutive model of HST2425 titanium alloy[J]. Heat Treatment of Metals, 2023, 48(1): 87-94.

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HST2425钛合金动态力学行为及本构模型

Dynamic mechanical behavior and constitutive model of HST2425 titanium alloy

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