クロムの延性 : 脆性遷移挙動に及ぼす加工熱処理の影響  [in Japanese] Effect of Thermo-mechanical Treatment on Ductile-Brittle Transition Behavior of Chromium  [in Japanese]

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Author(s)

    • 原田 泰典 HARADA Yasunori
    • 豊橋技術科学大学工学部生産システム工学系 Department of Production Systems of Engineering, Faculty of Engineering, Toyohashi University of Technology
    • 大森 正信 OHMORI Masanobu
    • 広島国際学院大学工学部機械工学科 Departmcnt of Mechanical Engineering, Faculty of Engineering, Hiroshima Kokusai Gakuin University

Abstract

High purity chromium powders were sintered into a block by means of hot isostatic pressing. Pieces taken from the sintered block were thermo-mechanically treated, <I>i.e.</I>, repeatedly rolled at 973 K up to 50 and 85% in total reduction with and without intermediate annealing at 1273 K. The ductile-brittle transition temperature, DBTT, was determined by a tension test with the specimens cut from the as-sintered block and the rolled sheets. DBTT for the specimen rolled without intermediate annealing was about 600 K, while DBTT of the specimen rolled with the annealing was 400 K much lower than the above temperature 600 K and the temperature 500 K which was found in the as-sintered material. The reduction in DBTT through the thermo-mechanical treatment probably comes from the decrease of susceptibility to the occurrence of brittle fracture at grain boundaries.

Journal

  • Journal of the Japan Institute of Metals and Materials

    Journal of the Japan Institute of Metals and Materials 66(5), 485-491, 2002-05-20

    The Japan Institute of Metals and Materials

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Codes

  • NII Article ID (NAID)
    10008833112
  • NII NACSIS-CAT ID (NCID)
    AN00062446
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    00214876
  • NDL Article ID
    6179017
  • NDL Source Classification
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL Call No.
    Z17-314
  • Data Source
    CJP  NDL  J-STAGE 
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