摩擦圧接による純アルミニウムの高温強加工組織とその性質に関する基礎的研究

概要

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Very fine structure of the friction welded joint interface can be attributed to the result of heavy working above recrystallization temperature. The purpose of this study is to know the mechanism of formation and the properties of such fine structure of pure aluminium, varying working temperature, strain rate, and strain by hot torsion testing machine. Main results are as follows, (1) Deformation resistance increases with a increment of strain up to a definite value, at which the deformation resistance becomes almost constant value. This value depends mainly on working temperature. (2) Dynamically formed fine structure at various working condition consists of subgrains, and the subgrain size depends both on working temperature and on strain rate. (3) Hot-heavy-worked specimen at 350℃∿500℃ showed higher strength and enough elongation, and its microstructure was similar as that of friction welds.
社団法人溶接学会の論文
1979-11-05