Steels used in coal gasification vessels and piping (externals) can be exposed to mixtures of hydrogen, water vapor (steam), hydrogen sulfide, methane, carbon monoxide, carbon dioxide, and other gases at temperatures and pressures up to 600°K and 10 MPa. Such mixtures, under certain operating conditions, can either enhance or inhibit crack growth in these steels. As a part of a program to identify thermodynamic conditions for this enhancement or inhibition, fatigue crack growth experiments have been carried out on a 2-1/4Cr-1 Mo (ASTM A542, Class 2) steel in hydrogen, water vapor, and hydrogen sulfide at low pressures (below 133 kPa). The results indicate considerable enhancement of fatigue crack growth by some of these environments and also indicate that the apparent immunity of this material to stress corrosion cracking does not imply the same immunity to corrosion fatigue. The results will be discussed in terms of the influences of temperature, gas pressure and loading variables, and will be interpreted in terms of chemical reaction kinetics.
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July 1979
Research Papers
Fatigue Crack Growth in 2-1/4-Cr-1Mo Steel Exposed to Hydrogen Containing Gases
R. Brazill,
R. Brazill
Department of Mechanical Engineering, and Mechanics and Center for Surface and Coatings Research, Lehigh University, Bethlehem, Pa. 18015
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G. W. Simmons,
G. W. Simmons
Department of Mechanical Engineering, and Mechanics and Center for Surface and Coatings Research, Lehigh University, Bethlehem, Pa. 18015
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R. P. Wei
R. P. Wei
Department of Mechanical Engineering, and Mechanics and Center for Surface and Coatings Research, Lehigh University, Bethlehem, Pa. 18015
Search for other works by this author on:
R. Brazill
Department of Mechanical Engineering, and Mechanics and Center for Surface and Coatings Research, Lehigh University, Bethlehem, Pa. 18015
G. W. Simmons
Department of Mechanical Engineering, and Mechanics and Center for Surface and Coatings Research, Lehigh University, Bethlehem, Pa. 18015
R. P. Wei
Department of Mechanical Engineering, and Mechanics and Center for Surface and Coatings Research, Lehigh University, Bethlehem, Pa. 18015
J. Eng. Mater. Technol. Jul 1979, 101(3): 199-204 (6 pages)
Published Online: July 1, 1979
Article history
Received:
January 1, 1979
Online:
August 17, 2010
Citation
Brazill, R., Simmons, G. W., and Wei, R. P. (July 1, 1979). "Fatigue Crack Growth in 2-1/4-Cr-1Mo Steel Exposed to Hydrogen Containing Gases." ASME. J. Eng. Mater. Technol. July 1979; 101(3): 199–204. https://doi.org/10.1115/1.3443678
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