"N.Nakada,Naoki Hirakawa,T.Tsuchiyama,S.Takaki","Grain refinement of nickel-free high nitrogen austenitic stainless steel by reversion of eutectoid structure",,"Scripta Materialia",,"vol. 57",,"pp. 153-156.",2007,July "T.Tsuchiyama,N.Hirakawa,N.Nakada,S.Takaki","Decomposition of Austenite in Fe-25Cr-1N alloy Produced by Solution Nitriding",,"Materials Science Forum",,"vol. 539-543",,"pp. 4950-4955.",2007,Mar.