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1996 Fiscal Year Final Research Report Summary

Development of high functional materials with nanoscale structure by combined process of MA treatment and powder consolidation with underwater shock wave

Research Project

Project/Area Number 08455339
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Material processing/treatments
Research InstitutionKUMAMOTO UNIVERSITY

Principal Investigator

CHIBA Akira  Kumamoto Univ., Fac.of Engr., Prof., 工学部, 教授 (90005322)

Co-Investigator(Kenkyū-buntansha) HOKAMOTO Kazuyuki  Kumamoto Univ., Fac.of Engr., Assoc.Prof., 工学部, 助教授 (70199462)
NISHIDA Minoru  Kumamoto Univ., Fac.of Engr., Assoc.Prof., 工学部, 助教授 (90183540)
Project Period (FY) 1996
KeywordsMechanical alloying / Underwater-shock wave / Austenitic stainless steel / Functional materials / nano-scale structure / Grain refining / Deformation induced martensite / powder consolidation
Research Abstract

Commercially available SUS304L powders (powder size ; 44mum) and the powders mixed with Fe, Ni, or Cu powders were mechanically alloyed at first, and then the powders were consolidated by cylindrical axisymmetric explosive consolidation using water as a pressure medium to obtain nano-size grains. The compacts obtained were annealed between 873K and 1023K in salt bath. As results, (1) by the methods combined MA treatment with explosive consolidation, ultra fine grains with 90nm grain size were obtained by annealing at 873K for 20 min. The heat treatment using reversion from deformation induced martensite to austenite was suggested to obtain ultra fine grain structure in metastaible austenite steels. (2) compacts mixed with 4wt% Ni shows ultimat4e strength of 570MPa and elongation of 430% after heat-treatment at 1373K for 1h by tensile test.

  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] 孟昭: "衝撃固化した燃焼合成TiAl粉末の熱処理による組織変化" 熱処理. 36巻1号. 28-33 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 千葉昂: "ステンレス鋼粉末の水中衝撃固化と結晶粒微細化" 平成7年度衝撃波シンポジウム論文講演集. 353-356 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 孟昭: "燃焼合成法により作製したTiAl粉末の衝撃固化と機械的性質" 熊本大学工学部研究報告. 45巻1号. 1-6 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Chiba: "Fabrication of ZrO_2/Ni and ZrO_2/Al_2O_3 functionally grade materials by explosive powder consolidation technique" Proc.of FGM'96. (印刷中). (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 友重竜一: "水中衝撃波と自己伝播高温合成によるTiC-Al_2O_3系算電性セラミックの合成同時成形" 火薬学会誌. 57巻6号. 231-237 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 千葉昂: "各種粉末の衝撃固化" 材料技術. 15巻1号. 10-13 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 千葉昂: "衝撃圧縮法による生体用多孔性チタン複合材の創製" 平成8年度衝撃波シンポジウム論文講演集. (印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] C.Moon: "Microstructural evolution of explosively consolidated TiAl powder produced by combustion synthesis." J.Japan Soc.Heat Treatment. vol.36. 28-33 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Chiba: "Underwater-shock consolidation of stainless steel powders and grain refining treatment." Symposium on SHOCK WAVES,JAPAN '95. 353-356

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.Moon: "Microstructural evolution and mechanical properties of explosively compacted TiAl powder produced by combustion synthesis." Research Rep.of Faculty of Engr., Kumamoto Univ.vol.45. 1-6 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Chiba: "Fabrication of ZrO_2/Ni and ZrO_2/Al_2O_3 functionally graded materials by explosive powder consolidation technique." Proceeding of FGM '96. (in print). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R.Tomoshige: "Fabrication of TiC・Al_2O_3 electric conductive ceramics by utilizing explosive dynamic compaction and self-propagating high temperature synthesis." Kayaku Gakkaisi. vol.57. 231-237 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Chiba: "Explosive consolidation of powders" Material Technology. vol.15. 10-13 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Chiba: "Fabrication of porous titanium composite for medical implants by explosive compaction." Symposium on SHOCK WAVES,JAPAN '96. (in print). (1997)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-09  

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