Assessment and Test of the Creep-Fatigue Crack Behavior for a High Temperature Component

Author:

Lee Hyeong-Yeon1,Lee Jae-Han1,Nikbin Kamran2

Affiliation:

1. Korea Atomic Energy Research Institute, 150 Dukjin-dong, Yusong-gu, Daejeon 305-353, Korea

2. Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, UK

Abstract

Creep-fatigue crack behavior has been investigated for a welded component with 316L stainless steel and Mod. 9Cr–1Mo steel through assessment and test. The evaluation of creep-fatigue crack initiation and propagation was carried out for 316L stainless steel according to the French RCC-MR A16 guide, and the evaluation of creep-fatigue crack initiation for a Mod.9Cr–1Mo steel specimen was carried out with an extended A16 method. A test for a structural specimen with a diameter of 500 mm, height of 440 mm, and thickness of 6.3 mm was performed to compare its results with that by an assessment according to the A16 guide. The specimen was subjected to creep-fatigue loads with 2 h of dwell time at 600°C and various primary loads. The creep-fatigue crack behaviors for the two materials were assessed, observed, and compared. The results showed that the A16 guide for the austenitic stainless steel was fairly conservative for the assessment of creep-fatigue crack initiation while it was reasonably conservative for creep-fatigue crack growth for the present specimen.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Safety, Risk, Reliability and Quality

Reference17 articles.

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2. 2004, ASME Boiler and Pressure Vessel Code, Section III, Rules for Construction of Nuclear Power Plant Components, Div. 1, Subsection NH, Class 1 Components in Elevated Temperature Service.

3. RCC-MR, 2002, Subsection B, Design and Construction Rules for Mechanical Components of FBR Nuclear Islands, 2002 Edition, AFCEN.

4. RCC-MR, 2002, Subsection Z, Technical Appendix 16, Design and Construction Rules for Mechanical Components of FBR Nuclear Islands, 2002 Edition, AFCEN.

5. Fatigue Initiation of Crack Under Mode III and Mixed Mode I+III Loads in a 9Cr Steel;Metheron

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