Nature of the slow-fracture phenomenon in quenched steels

See adjacent abstract. One of the most dangerous types of brittle fracture is delayed brittle fracture. Over the 40-odd period of investigation into this phenomenon, several hypotheses have been advanced, among them the vacancy one, the one of surface-active media, and others. At present, the most p...

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Bibliographic Details
Published in:Metal science and heat treatment 1993-04, Vol.35 (4), p.198-206
Main Authors: Zabil'skii, V. V., Velichko, V. V.
Format: Article
Language:English
Online Access:Get full text
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Summary:See adjacent abstract. One of the most dangerous types of brittle fracture is delayed brittle fracture. Over the 40-odd period of investigation into this phenomenon, several hypotheses have been advanced, among them the vacancy one, the one of surface-active media, and others. At present, the most popular hypothesis is the one of the local internal stresses, concentrated in the martensite structure on the grain boundaries. The article offers the results of the studies on delayed embrittlement of quenched steels in the untempered state, and proposes its mechanism, in accordance to which the principal role in this process belongs to diffusion-mobile hydrogen, whose small quantities are formed in quenching.
ISSN:0026-0673
1573-8973
DOI:10.1007/BF00775137