オーステナイト系不銹鋼の高温における二,三の強度特性と組織の変化

概要

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Mechanical properties of some austenitic stainless steels at elevated temperatures were investigated and discussed from the viewpoint of carbide precipitation. Though static strength of stainless steels decrease with increasing temperature, it is almost constant at temperatures about from 300℃ to 600℃, and at this temperature range, a serrated discontinuous phenomenon appears in stress-strain curves during tensile test. A fatigue test was carried out as temperatures of 460℃, 630℃ and 700℃. The fatigue limit is affected by carbon content of steel and is higher than the yield point, and a conspicuous coaxing effect is observed. These observations may be related to the fact that chromium carbide or others precipite out at slip bands and grain boundaries during the high temperature tests and prevent dislocation s from moving. This criterion was confirmed by the observation of microstructure of specimens.
社団法人日本材料学会の論文
1960-02-15