Establishment of procedures to obtain the maximum TRIP effect

• Project/Area Number: 26289264
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: University of Hyogo
• Principal Investigator: Tsuchida Noriyuki 兵庫県立大学, 工学研究科, 准教授 (90382259)
• Co-Investigator(Kenkyū-buntansha): Stefanus Harjo (STEFANUS Harjo) 国立研究開発法人日本原子力研究開発機構, その他部局等, 研究員 (40391263) ; 友田 陽 茨城大学, その他部局等, 名誉教授 (90007782)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000); Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2015: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000); Fiscal Year 2014: ¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000)
• Keywords: 鉄鋼 / TRIP効果 / 強度 / 延性 / 鉄鋼材料

Outline of Final Research Achievements

The maximum TRIP effect due to the effective use of retained austenite was studied by using a TRIP steel. Tensile tests with a wide range of temperature and strain rate were conducted. In situ neutron diffraction experiments during tensile deformation were performed to discuss the deformation-induced transformation behavior and the contribution of each phase to flow stress. We can make clear the results of deformation-induced martensite which was difficult to show quantitatively for the first time. Room-temperature creep tests under constant load were also conducted using the TRIP steel. The volume fractions of deformation-induced martensite at a given true strain obtained from constant load creep tests were larger than those from tensile tests. Based on the experimental results from several viewpoints, the test condition and deformation-induced transformation behavior to obtain the uniform elongation 1.5 times as large as that at 296 K can be clarified.

Research Products

• [Journal Article] Room-temperature Creep Tests under Constant Load on a TRIP-aided Multi-microstructure Steel (2017)
  • Author(s): N.Tsuchida, N.Nagahisa and S. Harjo
  • Journal Title: Materials Science and Engineering A Volume: 700 Pages: 631-636
  • DOI: 10.1016/j.msea.2017.06.049
  • Peer Reviewed
• [Journal Article] Martensite Phase Stress and the Strengthening Mechanism in TRIP steel by Neutron Diffraction (2017)
  • Author(s): S.Harjo, N.Tsuchida, J.Abe and W. Gong
  • Journal Title: Scientific Reports Volume: 7 Issue: 1 Pages: 15149-15149
  • DOI: 10.1038/s41598-017-15252-5
  • NAID: 120006406831
  • Peer Reviewed
• [Journal Article] 1GPa級TRIP型複合組織鋼の高速引張変形挙動 (2017)
  • Author(s): 土田紀之，大倉誠史，田中孝明，田路勇樹
  • Journal Title: 鉄と鋼 Volume: 103 Pages: 600-608
  • Peer Reviewed / Open Access
• [Journal Article] Effect of specimen size on true stress-true strain relationship up to the plastic deformation limit in ultrafine-grained ferrite-cementite steels (2017)
  • Author(s): 土田 紀之,上野 秀平,井上忠信
  • Journal Title: Transactions of the JSME (in Japanese) Volume: 83 Issue: 847 Pages: 16-00315-16-00315
  • DOI: 10.1299/transjsme.16-00315
  • NAID: 130006943708
  • ISSN: 2187-9761
  • Peer Reviewed / Open Access
• [Journal Article] 引張試験とその基礎 (2016)
  • Author(s): 土田紀之
  • Journal Title: ふぇらむ Volume: 21 Pages: 389-396
  • Peer Reviewed
• [Journal Article] Effect of Strain Rate on True Stress-True Strain Relationship of Ultrafine-grained Ferrite-Cementite Steels up to the Plastic Deformation Limit (2015)
  • Author(s): N.Tsuchida, H.Nakano, T.Okamoto and T.Inoue
  • Journal Title: Mater. Sci. Eng Volume: A, 626 Pages: 441-448
  • DOI: 10.1016/j.msea.2014.12.080
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Enhanced True Stress-True Strain Relationship due to Grain Refinement of a Low-carbon Ferrite‒Pearlite Steel (2015)
  • Author(s): N.Tsuchida, T.Inoue, H.Nakano, T.Okamoto
  • Journal Title: Materials Letters Volume: 160 Pages: 117-119
  • DOI: 10.1016/j.matlet.2015.07.093
  • Peer Reviewed
• [Journal Article] Study of tempering behavior of lath martensite using in situ neutron diffraction (2015)
  • Author(s): Z.M. Shi, W. Gong, Y. Tomota, S. Harjo, J. Li, B. Chi, J. Pu
  • Journal Title: Materials Characterization Volume: 107 Pages: 29-32
  • DOI: 10.1016/j.matchar.2015.06.040
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effect of non-isothermal deformation of austenite on ferrite transformation behavior studied by in-situ neutron diffraction (2015)
  • Author(s): Z. Shi, Y. Tomota, S. Harjo, Y. Su, B. Chi, J. Pu and L. Jian
  • Journal Title: Materials Science and Engineering A Volume: 631 Pages: 153-159
  • DOI: 10.1016/j.msea.2015.02.043
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Dislocation Characteristics of Martensitic Steel Studied by In-Situ Neutron Diffraction Experiment (2015)
  • Author(s): T. Kawasaki, S. Harjo, W. Gong, K. Aizawa, T. Iwahashi, Z. Shi, J. Li, Y. Tomota, T. Ungár
  • Journal Title: JPS Conference Proceeding Volume: 8 Pages: 031009-031009
  • DOI: 10.7566/jpscp.8.031009
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Stress-Strain Curves of Steels (2014)
  • Author(s): 土田紀之、ステファヌス・ハルヨ、大貫貴久、友田 陽
  • Journal Title: Tetsu-to-Hagane Volume: 100 Issue: 10 Pages: 1191-1206
  • DOI: 10.2355/tetsutohagane.100.1191
  • NAID: 130004696826
  • ISSN: 0021-1575, 1883-2954
  • Peer Reviewed / Open Access
• [Journal Article] Deformation Behavior of An Austenitic Steel by Neutron Diffraction (2014)
  • Author(s): S. Harjo, J. Abe, K. Aizawa, W. Gong, and T. Iwahashi
  • Journal Title: JPS Conf. Proc. Volume: 1 Pages: 014017-014017
  • Peer Reviewed
• [Journal Article] Engineering & Related Studies at J-PARC (2014)
  • Author(s): S. Harjo, K. Aizawa, J. Abe, W. Gong, T. Ito, T. Kawasaki and T. Iwahashi
  • Journal Title: Materials Science Forum Volume: 777 Pages: 12-18
  • Peer Reviewed
• [Journal Article] Stregthening Mechanism of Advanced Steel with Deformation Induced Phase Transformation (2014)
  • Author(s): S. Harjo, N. Tsuchida, W. Gong, J. Abe and K. Aizawa:
  • Journal Title: MLF Annual Report 2013 Volume: 1 Pages: 13-14
  • Peer Reviewed
• [Journal Article] Effects of Temperature and Strain Rate on Tensile Properties of a Lean Duplex Stainless Steel (2014)
  • Author(s): N.Tsuchida, T.Kawahata, E.Ishimaru and A.Takahashi
  • Journal Title: ISIJ International Volume: 54 Issue: 8 Pages: 1971-1977
  • DOI: 10.2355/isijinternational.54.1971
  • NAID: 130004685096
  • ISSN: 0915-1559, 1347-5460
  • Peer Reviewed / Open Access
• [Presentation] TRIP型複合組織鋼の常温での荷重一定クリープ試験中のその場中性子回折実験 (2017)
  • Author(s): 土田紀之
  • Organizer: 日本鉄鋼協会 第173回春季講演大会
• [Presentation] 1GPa級TRIP型複合組織鋼の高速引張変形挙動 (2017)
  • Author(s): 土田紀之
  • Organizer: 日本鉄鋼協会 第173回春季講演大会
• [Presentation] TRIP Effect in a Constant Load Creep Test at Room Temperature (2017)
  • Author(s): 土田紀之
  • Organizer: Interactions of Phase Transformations and Plasticity International Conference on Martensitic Transformations (ICOMAT 2017)
  • Int'l Joint Research
• [Presentation] 1GPa級TRIP型複合組織鋼の高速引張変形挙動 (2017)
  • Author(s): 土田紀之
  • Organizer: 日本鉄鋼協会第173回春季講演大会
  • Place of Presentation: 首都大学東京南大沢キャンパス
• [Presentation] TRIP型複合組織鋼の常温での荷重一定クリープ試験中のその場中性子回折実験 (2017)
  • Author(s): 土田紀之
  • Organizer: 日本鉄鋼協会第173回春季講演大会
  • Place of Presentation: 首都大学東京南大沢キャンパス
• [Presentation] True Stress-True Strain Relationships up to the Plastic Deformation Limit independent of the Specimen Size in Ultrafine-Grained Ferrite-Cementite Steels (2016)
  • Author(s): N. Tsuchida
  • Organizer: NANO2016
  • Place of Presentation: ケベックシティーコンベンションセンター
  • Year and Date: 2016-08-08
  • Int'l Joint Research
• [Presentation] TRIP型複合組織鋼の常温における荷重一定クリープ試験 (2016)
  • Author(s): 土田紀之，永久直
  • Organizer: 日本鉄鋼協会第171回春季講演大会
  • Place of Presentation: 東京理科大学(東京都葛飾区)
  • Year and Date: 2016-03-23
• [Presentation] CMWP 解析の中性子回折プロファイルへの適用 -マルテンサイト変形機構解析を中心に- (2016)
  • Author(s): ハルヨ・ステファヌス
  • Organizer: 平成 27 年度金属組織研究会
  • Place of Presentation: エッサム神田ホール(東京都千代田区)
  • Year and Date: 2016-01-29
• [Presentation] TRIP型複合組織鋼の常温における荷重一定クリープ試験 (2015)
  • Author(s): 永久直，土田紀之
  • Organizer: 日本鉄鋼協会・日本金属学会 関西支部 材料開発研究会
  • Place of Presentation: 兵庫県立大学(兵庫県姫路市)
  • Year and Date: 2015-12-24
• [Presentation] Tensile deformation behavior of a metastable austenitic 18Cr-6Ni-0.2N steel (2015)
  • Author(s): N. Tsuchida, R. Bajo, E. Ishimaru, M. Kawa, S. Tsuge
  • Organizer: Processing and Fabrication of Advanced Materials -XXIV
  • Place of Presentation: 関西大学(大阪府吹田市)
  • Year and Date: 2015-12-18
  • Int'l Joint Research
• [Presentation] SUS316L鋼のTRIP/TWIP効果 (2015)
  • Author(s): 土田紀之
  • Organizer: 日本鉄鋼協会第170回秋季講演大会
  • Place of Presentation: 九州大学(福岡県福岡市)
  • Year and Date: 2015-09-17
• [Presentation] 中性子を用いた工学材料の内部応力及ひ金属組織の研究 (2015)
  • Author(s): ハルヨ ステファヌス，相澤一也，川崎卓郎
  • Organizer: 日本分析化学会 第 64 年会
  • Place of Presentation: 九州大学(福岡県福岡市)
  • Year and Date: 2015-09-09
  • Invited
• [Presentation] Metastable Austenitic Steel Deformation at Low Temperature (2014)
  • Author(s): S. Harjo, T. Kawasaki, W. Gong, K. Aizawa and T. Iwahashi:
  • Organizer: The 2nd J-PARC Symposium
  • Place of Presentation: つくば国際会議場(茨城県つくば市)
  • Year and Date: 2014-07-12 – 2014-07-15
• [Presentation] Strength of Materials and Related Engineering with TAKUMI of J-PARC (2014)
  • Author(s): S. Harjo, K. Aizawa, T. Kawasaki, W. Gong, J. Abe, T. Iwahashi, T. Ito and T. Harada
  • Organizer: The 2nd J-PARC Symposium
  • Place of Presentation: つくば国際会議場(茨城県つくば市)
  • Year and Date: 2014-07-12 – 2014-07-15
• [Book] 新版 鉄鋼材料と合金元素 (2015)
  • Author(s): 一般社団法人 日本鉄鋼協会 鉄鋼材料と合金元素編集委員会
  • Total Pages: 1077
  • Publisher: 一般社団法人 日本鉄鋼協会
• [Remarks] 先端鉄鋼材料TRIP鋼の特性をその場中性子回析で解析-自動車用鋼板の開発に新しい指針を示す-
  • URL: http://www.u-hyogo.ac.jp/outline/media/press/2018/monthly/2018_02.html#PRESS180226
• [Remarks] 土田紀之のホームページ
  • URL: http://www.eng.u-hyogo.ac.jp/msc/tsuchida/NT_Ring.html