Work hardening behavior of low carbon martensitic steel

K. Nakashima, Y. Fujimura, T. Tsuchiyama, S. Takaki

    研究成果: Contribution to journalArticle査読

    2 被引用数 (Scopus)

    抄録

    The work hardening behavior by cold rolling was investigated in ultralow carbon and low carbon martensitic steels containing 12%Cr or 18%Ni, and then the effect of carbon on the work hardening behavior was discussed in terms of the change in dislocation density and the microstructure development during deformation. In the ultralow carbon steel, the hardness is almost constant irrespective of the reduction ratio. On the other hand, the low carbon steel exhibits marked work hardening. The dislocation density of these specimens was confirmed to be never increased by cold rolling. It was also found that cold rolling gives no significant influence on the morphology of martensite packet and block structure. TEM images of the cold-rolled steels revealed that the martensite laths in the ultralow carbon steel are partially vanished, while those in the carbon bearing steel are stably remained. These results indicate that the solute carbon retards the movement of dislocations, which results in the high work hardening rate through the formation of fine dislocation substructure within laths.

    本文言語英語
    ページ(範囲)189-192
    ページ数4
    ジャーナルKey Engineering Materials
    345-346 I
    DOI
    出版ステータス出版済み - 1 1 2007

    All Science Journal Classification (ASJC) codes

    • 材料科学(全般)
    • 材料力学
    • 機械工学

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