Synopsis: A low carbon ferritic steel (Fe-0.0056%C) was used for the estimation of dislocation density. Annealed steel sheet with the ferrite grain size of 50 μm was subjected to cold rolling up to 80% thickness reduction and then provided to the X-ray diffraction analysis. Dislocation density was evaluated by the Modified Williamson-Hall / Warren-Averbach method. It was confirmed in cold rolled specimens that the equation; σy [GPa] = 0.05+18√ρ/109 stands up in the relation between yield stress ρy and dislocation density ρ [m-2]. On the other hand, the values of parameter π in the Modified Williamson-Hall equation were accurately estimated in each cold rolled specimen and it was found that the equation ρ[m-2] = 4.5×1019π2 stands up between π and ρ. In addition, it is suggested that the screw dislocation component decreases with cold rolling and, in specimens with cold rolling more than 40%, dislocations are of almost full edge dislocation.
|ジャーナル||Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan|
|出版物ステータス||出版済み - 11 2018|
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Metals and Alloys
- Materials Chemistry