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Mechanism of improved ductility of 1500 MPa-class ultra-high strength cold-rolled steel sheet produced by rolling and partitioning method

Rolling and Partitioning法で製造される1,500MPa級超高強度薄鋼板の高延性化のメカニズム

細谷 佳弘*; 松村 雄太*; 友田 陽*; 小貫 祐介*; Harjo, S.

Hosoya, Yoshihiro*; Matsumura, Yuta*; Tomota, Yo*; Onuki, Yusuke*; Harjo, S.

In this paper, the microstructure formation during the R&P process and the deformation mechanism that would bring about the excellent strength-ductility balance are discussed based on the results obtained from the in situ neutron diffraction measurement. The results have revealed that the typical Luders-like stress-strain curve of R&P steel is caused by competitive plastic flow between austenite and martensite, and an effective transformation induced plasticity phenomenon.

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パーセンタイル:45.11

分野:Metallurgy & Metallurgical Engineering

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