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基于摩擦修正的TC6钛合金低应变速率变形本构模型建立
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1.南昌航空大学;2.中航西安飞机工业集团股份有限公司

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航空科学基金(2019ZE056009);江西省重点研发计划(20202BBEL53012)


Low strain rate deformation constitutive model of TC6 titanium alloy based on friction correction
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Ives

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    摘要:

    采用Thermecmastor-Z100kn热模拟试验机对TC6钛合金进行了低应变速率大变形热压缩试验,获得了变形温度范围为900~945℃、应变速率范围为0.0001~0.1s-1、变形程度为70%时的真应力-真应变曲线。分别使用传统摩擦修正模型与改进摩擦修正模型对真应力-真应变曲线进行修正,并建立了基于摩擦修正的应变补偿型Arrhenius模型。结果表明:改进摩擦修正模型能更好地表征材料在大变形状态下的真应力-真应变动态响应。经摩擦模型修正的应变补偿型Arrhenius模型相线性相关度较高,平均绝对误差较小,预测值精度较高。

    Abstract:

    The thermal compression test of TC6 titanium alloy under low strain rate and large deformation was carried out by Thermecmastor Z100kn thermal simulation machine. The true stress-strain curves were obtained when the deformation temperature was 900 ~ 945℃, the strain rate was 0.0001 ~ 0.1s-1 and the deformation degree was 70%.The traditional friction correction model and the improved friction correction model were used to correct the true stress-strain curve, and the strain-compensated Arrhenius model based on the friction correction was established. The results show that the modified friction correction model can better characterize the true stress-strain dynamic response of materials under large deformation. The strain-compensated Arrhenius model modified by friction model has higher linear correlation, smaller mean absolute error and higher prediction accuracy.

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朱琳,徐勇,陈乐平,胡生双,辛周媛.基于摩擦修正的TC6钛合金低应变速率变形本构模型建立[J].稀有金属材料与工程,2023,52(5):1819~1825.[Zhu Lin, Xu Yong, Chen Leping, Hu Shengshuang, Xin Zhouyuan. Low strain rate deformation constitutive model of TC6 titanium alloy based on friction correction[J]. Rare Metal Materials and Engineering,2023,52(5):1819~1825.]
DOI:10.12442/j. issn.1002-185X.20220342

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历史
  • 收稿日期:2022-04-22
  • 最后修改日期:2022-06-14
  • 录用日期:2022-07-12
  • 在线发布日期: 2023-06-08
  • 出版日期: 2023-05-29