Grain boundary sliding at high temperature deformation in cold-rolled ODS ferritic steels

作者：Sugino, Yoshito^*; Ukai, Shigeharu; Leng, Bin; Oono, Naoko; Hayashi, Shigenari; Kaito, Takeji; Ohtsuka, Satoshi

来源：Journal of Nuclear Materials, 2014, 452(1-3): 628-632.

DOI：10.1016/j.jnucmat.2014.05.040

• CREEP

A tensile test was performed at a loading direction perpendicular to elongated cold-rolled grains, and it confirmed the step of the scratched lines across the grain boundaries on the specimen surface, providing evidence for grain boundary sliding in oxide dispersion strengthened (ODS) steels. Dynamic recovery within the grains was also observed, and a simple model was constructed that consisted of grain boundary sliding and mismatch accommodation induced by vacancy flow. It was confirmed that such grain boundary sliding was suppressed in ODS steel relative to iron as a result of the pinning of the dislocation movement by the dispersed oxide particles.

• 出版日期2014-9