Ni基超合金急冷薄帯の高温引張特性

概要

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In order to make clear relationship between high temperature tensile properties and fine microstructure of rapidly solidified cast-type Ni-base superalloys without heat treatment required for consolidation process, tensile test was carried out by changing strain rate from 5×10-5 s-1 to 2×10-2 s-1 and test temperature from 900°C to 1050°C using IN738LC and Rene80 melt-spinning ribbons by twin roll process which were superior to ribbons by single roll process from the viewpoint of structure homogeneity. The dependence of tensile strength on strain rate and test temperature was studied and strain rate sensitivity, m, were estimated from tensile test results. From this study, it was found that tensile strength was influenced by γ particle diameter, test temperature and strain rate, and "m" of ribbons exhibited above 0.3 over 950°C.
社団法人粉体粉末冶金協会の論文