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Report No.
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Revisit deformation behavior of lath martensite

Harjo, S.   ; Gong, W.   ; Kawasaki, Takuro   ; Morooka, Satoshi  ; Yamashita, Takayuki*

Two mechanisms inconsistent each other, a relaxation of type II internal stress and a presence of mobile dislocation, were previously proposed to describe the low elastic limit of as-quenched lath martensite steels. In this study, neutron diffraction experiments were performed to revisit the deformation behavior of lath martensite steel. The highly dense random arrangement dislocations easily moved at the beginning of deformation, then accumulated, annihilated and changed the arrangement differently depending on the orientation of the packet with respect to the deformation direction. The movement of highly dense random arrangement dislocations played an important role as a mechanism at the beginning of deformation, and can be a true feature of mobile dislocations.

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Category:Metallurgy & Metallurgical Engineering

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