AZ31マグネシウム合金薄肉円管における変形双晶を援用した局所力学的性質制御の試み

DOI Web Site

書誌事項

タイトル別名
  • An Attempt to Change Mechanical Properties in Local Area of AZ31 Magnesium Alloy Thin-walled Tube Using Mechanical Twinning
  • AZ31 マグネシウム ゴウキン ウスニクエンカン ニ オケル ヘンケイソウショウ オ エンヨウ シタ キョクショ リキガクテキ セイシツ セイギョ ノ ココロミ

この論文をさがす

抄録

<p>　　　Magnesium alloy generally has plastic anisotropy in mechanical properties due to hexagonal close-packed lattice structure and large differences among critical resolved shear stress of slip and twin systems. This study aimed to change the mechanical properties in a selected area of AZ31 Mg alloy thin-walled circular tube to meet the demands of products. First, the uniaxial tension-compression tests and compression-tension tests were conducted to investigate the influence of load reversal on the mechanical responses concerning the twin deformation. It was found that the strain hardening phenomenon in the deformation after the load reversal was strongly influenced by the pre-straining. Next, the localized bulging deformation was applied to the selected area to activate the extension twinning. The bulged area was then restored to its original profile by press forming in the radial direction of the circular tube. The activation of twinning in the bulged area was confirmed by the electron backscatter diffraction (EBSD) analysis. The change in the mechanical properties in the bulged area was investigated by the uniaxial tensile test and micro Vickers hardness test. The obtained results revealed that the bulged area exhibited better ductility as well as the higher flow stress than the initial state, with the aid of mechanical twinning.</p>

収録刊行物

  • 実験力学

    実験力学 20 (2), 131-138, 2020-07-09

    日本実験力学会

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ