About Tsuchiyama Toshihiro
About Department of Materials Science and Engineering, Kyushu University
About Tsuchiyama Toshihiro
About International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University
About Inoue Kurato
About Graduate Student, Kyushu University
About Hyodo Katsutoshi
About Graduate Student, Kyushu University
About Akama Daichi
About Department of Materials Science and Engineering, Kyushu University
About Nakada Nobuo
About Department of Materials Science and Engineering, Tokyo Institute of Technology
About Takaki Setsuo
About Research Center for Steel, Kyushu University
About Koyano Tamotsu
About Cryogenics Division, Research Facility Center, University of Tsukuba
About ISIJ International (Iron and Steel Institute of Japan)
About iron base alloy
About carbon additive alloy
About nitrogen additive alloy
About martensite
About metal structure (microstructure)
About indentation hardness
About dislocation density
About effect
About alloying element
About pinning effect
About organization
About lenticular martensite
About lath martensite
About midrib
About carbon
About nitrogen
About hardness
About retained austenite
About dislocation density
About solid solution strengthening
About Mechanical properties
About 炭素
About 窒素
About マルテンサイト
About ミクロ組織
About 硬度