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Strain behaviour of shock waves loaded titanium nickelide during martensitic transformations

机译:马氏体相变过程中冲击波加载镍钛合金的应变行为

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摘要

Plates of titanium nickelide (Ti-50.5 at. % Ni) rolled in the austenitic 62-state were loaded by shock waves with a pressures of 10 and 50 GPa. Dilatometry and X-ray diffraction show that the shock waves loading led to anisotropic martensitic transformations in the plates. The anisotropy of the transformations is caused by the directional motion of the plate substance in shock waves. The austenitic memory the samples had prior to the loading changed to the martensitic memory, inherent in the martensite deformation. The martensitic memory has not been retained after the reverse martensitic transformation; the samples had remembered the initial state with the austenitic memory. The carriers of the memory are particles of the precipitated phase (Ti_3Ni_4) and the dislocation structure formed upon rolling.
机译:通过冲击波在10和50 GPa的压力下加载以奥氏体62态轧制的镍化钛(Ti-50.5 at。%Ni)板。膨胀计和X射线衍射表明,冲击波载荷导致板中的各向异性马氏体转变。转变的各向异性是由板状物质在冲击波中的定向运动引起的。样品在加载之前具有的奥氏体记忆变为马氏体变形固有的马氏体记忆。马氏体逆向转变后,尚未保留马氏体的记忆。样品已经记住了奥氏体记忆的初始状态。存储器的载流子是析出相(Ti_3Ni_4)的颗粒和在滚动时形成的位错结构。

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