Suppression of dislocations at high strain rate deformation in a twinning-induced plasticity steel

Suppression of dislocations at high strain rate deformation in a twinning-induced plasticity steel
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孪生塑性钢高应变率变形时位错的抑制

DOI:
10.1016/j.msea.2015.01.047
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发表时间:
2015-03
影响因子:
6.4
通讯作者:
Huang M. X.
Huang M. X.
中科院分区:
材料科学1区
文献类型:
--
作者:
Liang Z. Y.;Huang W.;Huang M. X.

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应变速率的增加通常会促进面心立方(FCC)金属中位错的演化。然而,通过同步辐射X射线衍射实验,本工作首次表明,较高的应变速率导致较低的位错密度在孪晶诱导塑性钢与FCC结构。这种意想不到的抑制位错演化已归因于温度升高,由于在高应变速率变形耗散加热。
The increase of strain rate generally enhances dislocation evolution in face-centred cubic (FCC) metals. However, by synchrotron X-ray diffraction experiments, the present work demonstrates for the first time that a higher strain rate leads to a lower dislocation density in a twinning-induced plasticity steel with an FCC structure. This unexpected suppression of dislocation evolution has been attributed to the temperature increase due to dissipative heating at high strain rate deformation.
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