Effect of Heat Treatment on Tensile Strength of Explosively-Welded Maraging Steel/Al and Maraging Steel/Ti Multilayered Composites

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  • Chiba Akira
    Department of Materials Science and Resource Engineering, Kumamoto University
  • Hokamoto Kazuyuki
    Graduate Student, Kumamoto University
  • Nishida Minoru
    Department of Materials Science and Resource Engineering, Kumamoto University

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Other Title
  • マルエージング鋼で強化した爆接Al系およびTi系積層複合材の引張強度におよぼす熱処理の影響
  • マルエージング コウ デ キョウカシタ バクセツ Alケイ オヨビ Tiケイ

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Abstract

Multilayered aluminum and titanium base composites reinforced with 18%Ni maraging steel sheets were fabricated by the single-shot explosive welding technique. Microstructures and tensile strength of these composites were examined. The effect of heat treatment on the tensile strength of the composites is analyzed based on the rule of mixtures. When the reinforcement exhibits the maximum strength by aging, the ultimate tensile strength of both composites aged after welding is about 1.5 times higher than that of the aged one before welding. The former is slightly higher than that predicted from the rule of mixtures. This increment is attributable to the strengthening by the thin intermetallic compound layer formed by aging. The effect of the thickness of the intermetallic compound layer on the tensile strength of the titanium base composite is also described.

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