Strengthening of Pure-Aluminium Specimen by Application of Extrusion with Torsional Deformation

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  • ねじり押し出し法による純アルミニウムの高強度化の試みに関して
  • ネジリ オシダシ ホウ ニ ヨル ジュンアルミニウム ノ コウキョウドカ ノ ココロミ ニ カンシテ

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Abstract

New grain refinement and strengthening technique by referring ECAP(equal channel angular pressing) technique was developed. ECAP technique is effective hot working technique for grain refinement and strengthening of metal material. This technique is able to give the high shear plastic strain for the material without transformation of specimen geometrically. However, traditional ECAP technique restricts material type and shape, especially length. Such kind of restricts caused various problem for practical use. In the present study, traditional ECAP dies was modified and a process of cold working was proposed to give the high plastic strain for long length pure-aluminum specimen. The effectiveness of present method for improvement mechanical property was confirmed by hardness test.

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