MICROCRACKING DYNAMIC IN HYDROGENATED AUSTENITIC STEELS

摘要: ABSTRACT Electrolytically hydrogenated austenitic steels which include 304L, 316L and 310 were investigated. The problem of microcracking was focused with an emphasis on dynamic aspects. experimental programme combined means to provide continuous information regarding crystallo-graphical micro structural changes due hydrogenation. For this purpose X-ray techniques Mossbauer spectroscopy utilized. Additionally, surface examination performed by light microscopy, replication technique, scanning electron microscopy microautoradiography. At the same time fundamental data, namely, mechanical properties phases stability for selected materials accumulated. With no exception, hydrogenation resulted considerable lattice expansion more than 5%. Microcracking developed as delayed phenomenon mainly after termination hydrogen charging. Even in case reversible e′ transformed stainless steel, occurred a similar fashion. contribution contraction is analysed.Finally, disputed topic hydride effects discussed. Relevant diffraction metallographic studies oppose formation alternative.