ASB induced phase transformation in high oxygen doped commercial purity Ti
ASB induced phase transformation in high oxygen doped commercial purity Ti
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ASB 在高氧掺杂商业纯钛中诱导相变
DOI：
10.1016/j.msea.2021.142321
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发表时间：
2021-11
期刊：
影响因子：
6.4
通讯作者：
Li Yulong
中科院分区：
文献类型：
--
作者：
Shi Wendi;Lu Siyu;Shen Jianghua;Chen Biao;Umeda Junko;Wei Qiuming;Kondoh Katsuyoshi;Li Yulong
鉴于商业纯钛（CP-Ti）掺杂与高氧浓度最近被报道具有高的机械性能，本工作研究的单轴冲击载荷下的材料的破坏行为和其机制。除了氧的强硬化效应之外，发现增加氧含量导致CP-Ti中绝热剪切破坏的倾向增加。织构或晶粒取向对绝热剪切带（ASB）的形成也有深刻的影响。高氧CP-Ti的显微组织研究表明，均匀和等轴的纳米晶粒内ASB产生。这些纳米晶粒的取向进行了分析，使用旋进电子衍射（PED）技术。这为ASB发生相变提供了直接证据。结果表明，ASB中的纳米晶粒是由母晶通过相变形成的，表明α→β→α相变过程参与了ASB的演化，是ASB晶粒细化的一种机制。因此，这一结果是对公认的ASB演化的传统动态再结晶机制的补充。
Given that commercial purity titanium (CP-Ti) doped with a high oxygen concentration has recently been reported with high mechanical performance, the present work investigated the failure behavior and its mechanisms of the material under uniaxial impact loading. Besides the strong hardening effect of oxygen, it was found that increasing oxygen content led to increased propensity for adiabatic shear failure in CP-Ti. The texture or grain orientation was also found to have profound influence on the formation of adiabatic shear band (ASB). Microstructural examinations on the postmortem high oxygen CP-Ti suggested that uniform and equi-axed nano-grains were produced within the ASB. The orientations of these nano-grains were analyzed using the precession electron diffraction (PED) technique. It provides direct evidence of phase transformation occurring in ASB. Then we demonstrate that the nano-grains in ASB formed from parent grains by phase transformation, indicating that the α→β→α phase transformation process takes part in ASB evolution and is an underlying mechanism of grain refinement. As such, this result is a supplement for traditional well-accepted dynamic recrystallization mechanism of ASB evolution.
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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
影响因子：
9.4
作者：
Gerlich, A. P.;Yue, L.;Zhang, H.
通讯作者：
Zhang, H.
影响因子：
3.9
作者：
D. Grady
通讯作者：
D. Grady
影响因子：
3.9
作者：
T. Burns;T. Trucano
通讯作者：
T. Burns;T. Trucano
影响因子：
2.7
作者：
Biao Chen;J. Shen;X. Ye;J. Umeda;K. Kondoh
通讯作者：
Biao Chen;J. Shen;X. Ye;J. Umeda;K. Kondoh