Effect of Precipitation on Cryogenic Toughness in Isothermally Aged Austenitic Stainless Steel


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The effect of grain-boundary precipitates on cryogenic impact toughness of two corrosion steels (standard AISI 316 and a steel with a nitrogen additive) is studied. The steels are aged at 600 – 900°C with a hold of up to 1000 min. The KCV impact toughness at –196°C is determined. It is shown that the impact toughness of the nitrogen-containing steel decreases under cooling after the aging at 700 and 800°C more considerably than that of steel 316 after aging at 800 and 900°C. The causes of the embrittlement of the nitrogen-containing steel are determined.

Sobre autores

M. Saucedo-Muñoz

Instituto Politecnico Nacional (ESIQUE)

Email: petroprom2013@yandex.ru
México, Apartado

V. Lopez-Hirata

Instituto Politecnico Nacional (ESIQUE)

Email: petroprom2013@yandex.ru
México, Apartado

E. Avila-Davila

Instituto Tecnologico de Pachuca

Email: petroprom2013@yandex.ru
México, Pachuca

J. Villegas-Cardenas

Universidad Politecnica

Email: petroprom2013@yandex.ru
México, Tultitlán de Mariano Escobedo

J. Gonzalez-Velazquez

Instituto Politecnico Nacional (ESIQUE)

Email: petroprom2013@yandex.ru
México, Apartado

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