Authors: Poquillon, D.; Cabrillat, M.-T.; Pineau, A.

Source: Materials at High Temperatures, Volume 16, Number 2, May 1999 , pp. 99-107(9)

Publisher: Science Reviews 2000 Ltd

Abstract:

This study deals with the understanding of creep crack initiation and creep crack growth in 316 LN austenitic stainless steel. To evaluate the respective role of the creep strain and that of the main principal stress on intergranular creep damage, original creep experiments were performed on sharp notched thin wall tubular specimens in 316 LN steel tested in torsion at 600°C. The specimens contained a sharply notch perpendicular to their axis. This resulted in overall Mode II loading. In the first part of the paper, the results of four experiments are reported, then, in the second part, a damage model identified previously and based on quantitative observations of grain boundary damage is used to simulate creep crack initiation and creep crack growth. Good agreement between the experimental results and the numerical simulations is found.

Keywords: creep crack initiation; 316 LN austenitic stainless steel

Document Type: Research article

DOI: http://dx.doi.org/10.3184/096034099783641182

Affiliations: 1: CEA Cadarache. DER/SERSI/LECC Bat 212 13108 St-Paul-lez-Durance Cedex, France

Publication date: 1999-05-15

More about this publication?

• Materials at High Temperatures serves the needs of those who develop and use materials for high temperature applications. It publishes peer reviewed contributions relating to high temperature applications in the power, chemical, engine, processing and furnace industries.

  The effects of high temperatures on corrosion, fatigue, creep, strength and wear in alloys, intermetallics, ceramics, refractories and composites are covered. Papers dealing with aspects of materials usage including modelling of behaviour and life prediction will be particularly welcome. The journal has a policy of emphasizing practical aspects and authors presenting results from research programmes are encouraged to relate these, if possible, to actual or potential applications.

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