X線回折法によるTi-15V-3Cr-3Sn-3Al合金溶接材の時効硬化挙動の検討

概要

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Age hardening was significantly promoted at a weld joint of a conventionally heat-treated Ti-15V-3Cr-3Sn-3Al alloy. Thelocal incerase in hardness resulted in a decrease in fracture toughness of the weld joint. So a new heat treatment method has been developed to acheve its high fracture toughness. On the basis of our experimental results, the age hardening behavior of the weld joint has been evaluated by X-ray diffraction. Back-reflection Debye patterns were observed in the weld-metal (WM), heat-affect-zone (HAZ) and base-metal(BM) of welded materials. The Debye patterns of WM and HAZ. Furthermore, in WM and HAZ, sub-boundaries were observed within a recrystallized β grain. These results may suggest that sub-structures markedly affect the age hardening of the weld joint.
社団法人日本材料学会の論文
1993-06-15