Dynamic failure of titanium: Temperature rise and adiabatic shear band formation
Dynamic failure of titanium: Temperature rise and adiabatic shear band formation
复制标题
钛的动态失效：温度升高和绝热剪切带形成
DOI：
10.1016/j.jmps.2019.103811
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发表时间：
2020-02
期刊：
影响因子：
--
通讯作者：
Li Yulong
中科院分区：
文献类型：
--
作者：
Guo Yazhou;Ruan Qichao;Zhu Shengxin;Wei Qiuming;Lu Jianan;Hu Bo;Li Yulong
与动态剪切局部化有关的最重要的问题之一是应力崩塌、温度升高和绝热剪切带（ASB）形成之间的相关性。采用动态剪切-压缩试验，结合高速摄影和红外测温技术，研究了纯钛的绝热剪切破坏过程。记录了应力破坏、ASB萌生、温升和裂纹形成等重要事件的时间序列。系统地研究了ASB的宽度、临界应变、温度、扩展速度和冷却速率等关键特性。实验测得ASB的最大传播速度约为1900 m/s，约为0.6Cs（Cs为剪切波速）。ASB内的最高温度在350-650 °C的范围内，而靠近ASB的材料也被加热。ASB的冷却速率约为106°C/s，这表明ASB需要几百微秒才能冷却到环境温度。一个重要的观察结果是，表观温度上升发生在ASB启动之后，这表明它可能不是ASB的原因，而是ASB的后果。由于这一概念的重要性，需要进一步努力加以确认。
One of the most important issues related to dynamic shear localization is the correlation among the stress collapse, temperature elevation and adiabatic shear band (ASB) formation. In this work, the adiabatic shear failure process of pure titanium was investigated by dynamic shear-compression tests synchronically combined with high-speed photography and infrared temperature measurement. The time sequence of important events such as stress collapse, ASB initiation, temperature rise and crack formation was recorded. The key characteristics of ASB, such as width, critical strain, temperature, propagation speed and cooling rate were systematically studied. The maximum propagation velocity of ASB is found in this work to be about 1900 m/s, about 0.6Cs(Csis the shear wave speed). The maximum temperature within ASB is in the range of 350–650 °C, while the material close to ASB is also heated. The cooling rate of ASB is on the order of 106°C/s, indicating that it needs a few hundreds of microseconds for the ASB to cool down to the ambient temperature. One important observation is that the apparent temperature rise occurs after ASB initiation, which indicates that it might not be the causation but the consequences of ASB. Further efforts are called for confirmation of this notion because of its significance.
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影响因子：
6.2
作者：
Youping Zheng;W. Zeng;Yubo Wang;D. Zhou;Xiongxiong Gao
通讯作者：
Youping Zheng;W. Zeng;Yubo Wang;D. Zhou;Xiongxiong Gao
DOI：
10.1016/0036-9748(84)90418-6
发表时间：
1984-05
期刊：
Scripta Metallurgica
影响因子：
--
作者：
R. Clifton;J. Duffy;K. A. Hartley;T. Shawki
通讯作者：
R. Clifton;J. Duffy;K. A. Hartley;T. Shawki
DOI：
10.1016/s0921-5093(03)00305-8
发表时间：
2003-10
影响因子：
6.4
作者：
Q. Wei;T. Jiao;S. Mathaudhu;E. Ma;K. Hartwig;K. Ramesh
通讯作者：
Q. Wei;T. Jiao;S. Mathaudhu;E. Ma;K. Hartwig;K. Ramesh
影响因子：
3.9
作者：
D. Grady
通讯作者：
D. Grady
影响因子：
5.3
作者：
S. Mercier;A. Molinari
通讯作者：
S. Mercier;A. Molinari