The adiabatic shear bands of U-5.7Nb at high strain rate

WANG Xiaoying 1 HE Lifeng 2 BAI Bing 1 WU Xiangchao 2 LIU Tingting 1 TANG Xiane 2 ZHANG li 2 XU fang 2 ZHAO Lifang 2 1

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The adiabatic shear bands of U-5.7Nb at high strain rate

更新时间：2021-03-12

- The adiabatic shear bands of U-5.7Nb at high strain rate
- NUCLEAR TECHNIQUES Vol. 32, Issue 11, (2009)
- 作者机构：
  
  1. 表面物理与化学国家重点实验室
  2. 中国工程物理研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TG146.8
- Published：01 November 2009
- 稿件说明：
移动端阅览
[1]王小英,何立峰,白彬,巫祥超,刘婷婷,唐县娥,张丽,徐芳,赵利芳.高应变率下U-5.7Nb合金的绝热剪切变形[J].核技术,2009,32(11):875-880.

WANG Xiaoying 1 HE Lifeng 2 BAI Bing 1 WU Xiangchao 2 LIU Tingting 1 TANG Xiane 2 ZHANG li 2 XU fang 2 ZHAO Lifang 2 1. The adiabatic shear bands of U-5.7Nb at high strain rate[J]. Nuclear techniques, 2009, 32(11): 875-880.
[1]王小英,何立峰,白彬,巫祥超,刘婷婷,唐县娥,张丽,徐芳,赵利芳.高应变率下U-5.7Nb合金的绝热剪切变形[J].核技术,2009,32(11):875-880. DOI：

WANG Xiaoying 1 HE Lifeng 2 BAI Bing 1 WU Xiangchao 2 LIU Tingting 1 TANG Xiane 2 ZHANG li 2 XU fang 2 ZHAO Lifang 2 1. The adiabatic shear bands of U-5.7Nb at high strain rate[J]. Nuclear techniques, 2009, 32(11): 875-880. DOI：

摘要

利用分离式Hopkinson压杆实验和显微分析技术

研究了U-5.7Nb合金在应变率范围（102/s?104/s）内的变形特征和微观组织。结果表明:U-5.7Nb合金的动态屈服强度明显高于其静态屈服强度

表现出明显的应变率敏感效应;当U-5.7Nb合金应变率为4300/s

试件在应变达到64%时发生剪切破坏。材料内部形成了明显的绝热剪切带

剪切带在与压缩方向垂直的平面内呈环形

这与动态压缩过程中应力分布不均匀有关。

Abstract

Split-Hopkinson pressure bar testing and microscopy were used to determine the dynamic mechanical properties and the microstructure in the strain rate range of 10 2-10 4/s for U-5.7Nb alloy samples.The experimental results showed that the dynamic yield strengths were higher than corresponding static values

and the failure was sensitive to the strain rate.Microscopic examinations revealed that the breaking (or breakdown) of specimen frequently occurred along the shear band at the strain rate of 4300/s and stress of 64%.A hemicyclic shear band appeared on the transverse section of the specimens

and this could be determined by analyzing the stress distribution.

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Related Institution

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Shanghai Research Institute of Materials,Shanghai Key Lab for Engineering Materials Application and Evaluation,National Quality Supervision Testing Center for Metallic Materials

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