環状切欠試験片内のクリープボイドの発生と進展

概要

論文の詳細を見る
Creep rupture in engineering materials is mainly controlled by the growth of creep voids and cracks. Although many experimental and theoretical studies on creep damage under uniaxial stress state have been performed over the last decade, the effect of multiaxial stress has not been fully examined. Circumferentially notched bars can easily produce a multiaxial stress state around the net section of notch roots. Several creep damage tests have been carried out using this kind of specimen. The surface and longitudinal section near the net section were inspected by means of scanning electron microscopy and optical microscopy. As a result of the measurement of the configuration of creep voids and cracks, it was shown that the maximum length of creep voids can be expressed as a function of the lifetime ratio.
社団法人日本機械学会の論文
1997-05-25