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DEVELOPMENT OF FATIGUE DESIGN CURVES FOR THICK-SECTION 9CR-1MO FERRITIC STEEL FORGINGS

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Title DEVELOPMENT OF FATIGUE DESIGN CURVES FOR THICK-SECTION 9CR-1MO FERRITIC STEEL FORGINGS
 
Creator CHOUDHARY, BK
RAO, KBS
MANNAN, SL
KASHYAP, BP
 
Subject ferritic steels
fatigue design curves
lcf tests
 
Description Strain-controlled low-cycle fatigue (LCF) data have been generated on 9Cr-1Mo thick-section (300 mm) tube plate forgings under simulated postweld heat treatment conditions at 723, 773 and 793 K employing a constant strain rate of 1 x 10(-3) s-1. LCF tests were performed over strain amplitudes in the range +/- 0.25 to +/- 1.00%. The fatigue life was found to decrease with increasing temperature. The effect of temperature was more pronounced at low strain amplitudes. Within the range of strain amplitudes examined, the experimental data on fatigue life at elevated temperatures were found to match well with the life predicted by the Tomkins crack growth model. Tentative fatigue design curves for elevated temperatures have been formulated for 9Cr-1Mo based on information generated in the laboratory using the philosophy outlined in the ASME code case N-47. A fatigue design curve applicable for the temperature range 300-644 K was computed based on room temperature tensile properties, incorporating the concept of fatigue limit and mean stress.
 
Publisher BUTTERWORTH-HEINEMANN LTD
 
Date 2011-07-19T07:40:53Z
2011-12-26T12:51:04Z
2011-12-27T05:37:25Z
2011-07-19T07:40:53Z
2011-12-26T12:51:04Z
2011-12-27T05:37:25Z
1992
 
Type Article
 
Identifier INTERNATIONAL JOURNAL OF FATIGUE, 14(4), 219-223
0142-1123
http://dx.doi.org/10.1016/0142-1123(92)90003-U
http://dspace.library.iitb.ac.in/xmlui/handle/10054/5216
http://hdl.handle.net/10054/5216
 
Language en