2022 年 63 巻 3 号 p. 402-405
90% cold-rolled SUS316LN austenite stainless steels with different Mn content were annealed and the changes in the microstructure and texture after static recrystallization (SRX) were investigated. A typical heterogeneous nanostructure (HN), in which “eye”-shaped twin domains, shear bands and low-angle lamellae were main structural components, was developed by the heavy cold rolling. The formation of twin domains with crystallographical orientation of {111} // rolling plane effectively suppressed a sharp {101} texture evolution. However, preferential SRX nucleation at shear bands close to {101} orientation hindered the above {111} texture component and, then, a typical {101} one prevailed in whole area after full SRX. Dense nuclei in the HN led to homogeneous evolution of fine-grained structure. While the effects of Mn content on the microstructure and texture were not evident, superior mechanical properties appeared to be more emphasized with increasing Mn content.
