+高级检索
温度对U-5.7Nb合金动态压缩力学性能影响研究
DOI:
作者:
作者单位:

中国工程物理研究院材料研究所,中国工程物理研究院材料研究所,中国工程物理研究院材料研究所,中国工程物理研究院材料研究所

作者简介:

通讯作者:

中图分类号:

TG146.8

基金项目:

国防科技重点实验室基金(项目号9140C660201140C66275),中物院科学发展基金资助(项目号2014B0301046, 2015B0301066)


Dynamic Compression Behavior of U-5.7Nb Alloy at Elevated Temperatures
Author:
Affiliation:

Institute of Materials,China Academy of Engineering Physics,Institute of Materials,China Academy of Engineering Physics,Institute of Materials,China Academy of Engineering Physics,Institute of Materials,China Academy of Engineering Physics

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    利用Hopkinson杆装置开展了-100℃~400℃较宽温度范围下U-5.7Nb合金的动态压缩变形行为,研究结果表明U-5.7Nb合金的压缩性能对温度和应变率较为敏感。随实验温度升高,屈服应力迅速下降,下降速率约为2MPa/℃,而加工硬化行为基本不变,当温度升高至200℃以上时,静动态应力~应变曲线形态由“双屈服”转变为“单屈服”;随应变率提高,屈服应力及去孪生引起的硬化模量均明显增大。最后,结合金相分析结果讨论了400℃时静动态力学曲线分歧的来源。

    Abstract:

    High strain rate compression experiments of U-5.7Nb alloy were conducted at temperatures from -100℃ to 400℃ with split Hopkinson pressure bar apparatus. Results show that the compressive stress-strain response depends sensitively on the applied strain rate and test temperature. The yield stress of U-5.7Nb alloy was found to decreased rapidly with the increasing temperature at a rate of about 2MPa/℃, while the work hardening rate was relatively constant. At temperatures higher than 200℃,the shape of the stress~strain curves changed from duplex yield character to elastic-plastic character for both quasi-static and dynamic compression experiments. The hardening modulus caused by detwinning and the yield stress increased obviously with the increasing strain rates. Finally,the divergency of the low- and high-rate deformation curves at temperature of 400℃ was discussed based on the optical micrography.

    参考文献
    相似文献
    引证文献
引用本文

肖大武,何立峰,邱志聪,邹东利.温度对U-5.7Nb合金动态压缩力学性能影响研究[J].稀有金属材料与工程,2018,47(1):363~366.[Xiao Dawu, He Lifeng, Qiu Zhicong, Zou Dongli. Dynamic Compression Behavior of U-5.7Nb Alloy at Elevated Temperatures[J]. Rare Metal Materials and Engineering,2018,47(1):363~366.]
DOI:[doi]

复制
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2015-10-13
  • 最后修改日期:2015-11-26
  • 录用日期:2016-12-06
  • 在线发布日期: 2018-02-07
  • 出版日期: