超高ひずみ速度を含む広範囲なひずみ速度域でのインコネル材のひずみ速度依存性

抄録

The Cold Spray method, in which powder materials are impacted onto a base material below melting temperature and at high velocities, is one of the coating technologies that can form a dense film with relatively little influence of heat or atmosphere. In order to elucidate the film formation mechanism of the Cold Spray method, in this study, we experimentally researched the stress-strain relationships of Inconel 718, Inconel 600, and Inconel 601, which are often used in the Cold Spray method. Compression tests are conducted in a wide range of strain rates from quasi-static strain rates (10^−3/s) to ultra-high strain rates (10⁴/s) to identify the strain rate dependencies of these materials. From the obtained results of these stress-strain relationships, we formulated a constitutive equation that can describe the stress-strain relationship at any strain rate employed in the Cold Spray method. Since the results of pure nickel and Inconel 718 have already been shown in previous reports, in this study, the results of Inconel 600 and 601 are presented．