Creep Rupture Due to Material Damage by Cavitation

[+] Author and Article Information
A. R. Ragab

Department of Mechanical Design and Production, Faculty of Engineering, Cairo University, Giza, Egypte-mail: CAPSCU@GEGA.NET

J. Eng. Mater. Technol 124(2), 199-205 (Mar 26, 2002) (7 pages) doi:10.1115/1.1446076 History: Received June 02, 2000; Revised August 27, 2001; Online March 26, 2002
Copyright © 2002 by ASME
Topics: Creep , Rupture , Stress
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Domains of diffusion creep and power-law creep according to Cocks and Ashby 7 for four metals in uniaxial creep
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Rate of void growth according the present work (for different q’s) compared with that of Cocks and Ashby (for different N’s) 7; (σi0)=1
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Dependence of the accumulated strain at rupture εR on the parameter q at different initial void fractions Cvi
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The variation of Kachanov’s damage parameter 2 (as derived in the present work, Eq. (5c)) over creep time for different values of q
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Comparison of experimental data of stainless steel 18-8 with predictions of creep rupture time for different Cvi. Also, the effect of variable q on creep rupture time predictions taking Cvi=0.0001 for stainless steel 316.
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Comparison of experimental data with predictions of creep rupture time at different temperatures. Dotted lines indicate stress-time map for chromium steel at prescribed strain values.
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Correlation of experimental and calculated creep rupture time for a variety of alloys under uniaxial conditions. Data from Refs. 30313233 included in figure.
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Correlation of experimental and calculated creep rupture times and strains for four metals under necking conditions
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Evaluation of several creep rupture relations against the present work
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Correlation of creep-rupture strength and creep strength for 1 percent creep strain




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