Adiabatic shear banding of hot-rolling Ti–6Al–4V alloy subjected to dynamic shearing and uniaxial dynamic compression
Adiabatic shear banding of hot-rolling Ti–6Al–4V alloy subjected to dynamic shearing and uniaxial dynamic compression
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DOI：
10.1007/s12598-015-0556-8
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发表时间：
2015-07
期刊：
影响因子：
8.8
通讯作者：
Yumeng Luo;Jin-Xu Liu;Xingwang Cheng;Shu-kui Li;Fu-chi Wang;Wenqi Guo
中科院分区：
文献类型：
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作者：
Yumeng Luo;Jin-Xu Liu;Xingwang Cheng;Shu-kui Li;Fu-chi Wang;Wenqi Guo
研究了动态剪切和单轴动态压缩应力状态对热轧Ti-6Al-4V（TC 4）合金绝热剪切带（ASBing）的影响。通过计算试样破坏前的吸收能，定量评价了TC 4钛合金的绝热剪切带敏感性。结果表明，在动态剪切和单轴动态压缩条件下，热轧态TC 4合金的ASB敏感性均表现出明显的各向异性，但动态剪切条件下的ASB敏感性各向异性趋势与单轴动态压缩条件下相反。在单轴动态压缩条件下，沿着轧制方向（TD）加载时，材料对ASB的敏感性最高，而沿沿着轧制方向（RD）加载时，材料对ASB的敏感性最低。而在动态剪切条件下，材料表现出相反的行为，表现为沿沿着TD加载时的磁化率最低，而沿沿着RD加载时的磁化率最高。
Effect of stress state including dynamic shearing and uniaxial dynamic compression on adiabatic shear banding (ASBing) of hot-rolling Ti–6Al–4V (TC4) alloy was investigated. The absorbed energy of specimen before failure was calculated to evaluate the susceptibility to adiabatic shear band (ASB) of TC4 alloy quantitatively. Results show that the susceptibility to ASB of hot-rolling TC4 alloy exhibits obvious anisotropy under both dynamic shearing and uniaxial dynamic compression conditions, but the anisotropy of susceptibility to ASB under dynamic shearing condition exhibits an opposite tendency with that under uniaxial dynamic compression condition. Under the condition of uniaxial dynamic compression, material shows the highest susceptibility to ASB when loaded along transverse direction (TD) of the hot-rolling TC4, while the lowest susceptibility when loaded along rolling direction (RD). However, under the condition of dynamic shearing, the material behaves in the opposite way, demonstrating the lowest susceptibility when loaded along TD of the hot-rolling TC4, while the highest susceptibility when loaded along RD.