"Naoki Takata,Naoya Kanno,Masao Takeyama","Tensile Properties of Austenitic Heat Resistant Steel of Fe-20Cr-30Ni-2Nb at Ambient Temperature","The 1st International Conference on Advanced High-Temperature Materials Technology for Sustainable and Reliable Power Engineering (123HiMAT-2015)","JSPS Report of the 123rd Committee on Heat Resisting Materials and Alloys","JSPS of the 123rd Committee on Heat Resisting Materials and Alloys",,,"pp. 169-172",2016,Mar.
"高田尚記,環野直也,竹山雅夫","Laves相により粒界強化したFe-20Cr-30Ni-2Nbオーステナイト系耐熱鋼の室温近傍での衝撃変形挙","日本学術振興会耐熱金属材料第123委員会7月期研究会","日本学術振興会耐熱金属材料第123委員会研究報告","日本学術振興会耐熱金属材料第123委員会","Vol. 54","No. 2","pp. 73-84",2013,July
"高田尚記,環野直也,寺田芳弘,竹山雅夫","粒界をFe2Nb Laves相で被膜したオーステナイト系耐熱鋼の室温靭性と変形","日本金属学会2013年春期講演大会","日本金属学会講演概要","公益社団法人日本金属学会",,,,2013,Mar.
"Masao  Takeyama,Imanuel  Tarigan,Naoki  Takata,Yoshihiro  Terada,Naoya  Kanno","Fe2Nb Laves Phases as a Promising Strengthener in High-temperature Structural Steels","2012 MRS FALL MEETING","2012 MRS FALL MEETING PROGRAM & EXHIBIT GUIDE","Materials Research Socienty",,,"p. 416",2012,Nov.
"高田尚記,環野直也,Ruihui Zhang,寺田芳弘,竹山雅夫,Sharvan Kumar","オーステナイト系耐熱鋼におけるFe2Nb Laves相の強化相としての役割","日本金属学会2012秋期大会","日本金属学会講演概要，2012年秋期大会","日本金属学会",,,,2012,Sept.
"大阪太郎,環野直也,竹山雅夫,佐々木 直彦,堀井 重克","日本刀の素晴らしさ-その組織と機械的性質-","第73回日本熱処理技術協会講演大会","第73回日本熱処理技術協会講演大会講演概要集","日本熱処理技術協会",,,"pp. 25-26",2012,June
"Naoya Kanno,Naoki Takata,Takashi Matsuo,Masao Takeyama","Precipitation morphology and stability of Ni3Nb phase in Fe-20Cr-30Ni-2Nb austenitic heat ?resistant steels under creep at 973 K","12th International Conference on Creep and Frecture of Engineering Materials","Creep 2012/JIMIS 11 Final Circular and Abstract Booklet",,,,"p. 56",2012,May
"大阪太郎,環野直也,竹山雅夫,佐々木直彦,堀井重克","日本刀の組織とその機械的性質","社団法人日本鉄鋼協会学会第163回春季講演大会","材料とプロセス","社団法人日本鉄鋼協会学会","Vol. 25","No. 1",,2012,Mar.
"R.H.Zhang,Imanuel Tarigan,Naoya Kanno,Naoki Takata,Masao Takeyama","Influence of Grain Boundary Characteristics on the precipitation of Fe2Nb Laves Phase in  Fe-20Cr-30Ni-2Nb  Steels","社団法人日本鉄鋼協会学会第163回春季講演大会","材料とプロセス","社団法人日本鉄鋼協会学会","Vol. 25","No. 1",,2012,Mar.
"Naoya Kanno,Naoki Takata,Masao Takeyama","Effect of Grain Boundary Laves Phase on Mechanical Properties of Fe-20Cr-30Ni-2Nb Steels","TMS2012, 141st Annual Meeting & Exhibition","TMS2012 Final Program","TMS",,,"p. 410",2012,Mar.
"環野直也,高田尚記,竹山雅夫","Fe-20Cr-30Ni-2Nb鋼の室温における機械的性質","第162回秋季講演大会","材料とプロセスCD-ROM","社団法人日本鉄鋼協会","Vol. 24","  2011","  1046",2011,Sept.
"竹山雅夫,I. Tarigan,環野直也","オーステナイト系耐熱鋼における粒界析出相の役割",,"高温材料のフィジカル・メタラジー研究会","日本鉄鋼協会",,,"pp. 49-55",2011,Mar.
"Masao Takeyama,Imanuel Tarigan,Naoya Kanno","Creep Properties of Fe-20Cr-30Ni-2Nb Austenitic Heat Resistant Steels Strengthened by Intermetallics Designed for A-USC Power Plant","TMS 2011 140th Annual Meeting & Exhibition","TMS 2011 Annual Meeting Final Program","TMS",,,"p. 345",2011,Feb.
"環野直也,芳村和寛,高田尚記,松尾 孝,竹山雅夫","Fe-20Cr-30Ni-2Nbにおけるγ-Fe/γ"-Ni3Nb相間のミスフィット転位の解析","材料とプロセス第158回秋季講演大会","材料とプロセス(CD-ROM)","(社)日本鉄鋼協会","Vol. 23","No. 1","p. 34",2010,Mar.