Effect of heat treatment condition on elongation of H1n-tempered Al–Mn alloy with layered structure

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  • Yoshino Michihide
    Products Research and Development Department, Mitsubishi Aluminum Co., LTD.
  • Iwao Shohei
    Products Research and Development Department, Mitsubishi Aluminum Co., LTD.
  • Kuroda Shuu
    Products Research and Development Department, Mitsubishi Aluminum Co., LTD.

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Other Title
  • 層状組織を有するAl–Mn系合金H1n質別材の伸びに及ぼす熱処理条件の影響
  • 層状組織を有するAl-Mn系合金Hln質別材の伸びに及ぼす熱処理条件の影響
  • ソウジョウ ソシキ オ ユウスル Al-Mnケイ ゴウキン Hlnシツ ベツザイ ノ ノビ ニ オヨボス ネツ ショリ ジョウケン ノ エイキョウ
  • Effect of heat treatment condition on elongation of H1n-tempered Al^|^ndash;Mn alloy with layered structure

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The effect of heat treatment condition on elongation of H1n-tempered Al–Mn alloy with layered structure has been investigated. Uniform elongation and local elongation were measured respectively. The work hardening exponent (n value) increased with decreasing size and increasing density of dispersoid, and thus uniform elongation was improved. On the other hand, local elongation increased with refinement and homogenization of dislocation structure. It is considered that strain rate sensitivity exponent (m value) increases as dislocation structure becomes finer and more homogeneous, and thus localization of necking was inhibited and relatively homogeneous deformation continued up to higher strain.

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