Effects of hydrogen on fatigue crack growth of iron aluminides

Book · Sat Jul 01 00:00:00 EDT 1995

OSTI ID:72532

Castagna, A; Stoloff, N S ^[1]

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1. Rensselaer Polytechnic Inst., Troy, NY (United States). Materials Engineering Dept.

Three Fe-Al alloys, FAP-Y, FA-129, and Fe-35a%Al, containing 16, 28, and 35a%Al, respectively, have been subjected to fatigue crack growth testing in moist air, in oxygen, and in gaseous hydrogen. In each case hydrogen and air were embrittling. Crack growth rates increased significantly as frequency decreased. Fatigue crack growth results have been compared with those for other structural iron-base alloys. Surprisingly, FAP-Y displays the highest crack growth rate of any alloy examined, except at very low levels of stress intensity range. The mechanisms for embrittlement by hydrogen and by moisture in air are discussed.

• OSTI ID: 72532
• Report Number(s): CONF-941144-; ISBN 1-55899-265-0; TRN: IM9530%%144
• Resource Relation: Conference: Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 28 Nov - 9 Dec 1994; Other Information: PBD: 1995; Related Information: Is Part Of High-temperature ordered intermetallic alloys VI: Part 2. Materials Research Society symposium proceedings Volume 364; Horton, J. [ed.] [Oak Ridge National Lab., Oak Ridge, TN (United States)]; Baker, I. [ed.] [Dartmouth College, Hanover, NH (United States)]; Hanada, Shuji [ed.] [Tohoku Univ., Sendai (Japan)]; Noebe, R.D. [ed.] [NASA Lewis Research Center, Cleveland, OH (United States)]; Schwartz, D.S. [ed.] [McDonnell Douglas Aerospace, St. Louis, MO (United States)]; PB: 760 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON BASE ALLOYS
HYDROGEN EMBRITTLEMENT
CRACK PROPAGATION
FATIGUE
ALUMINIUM ALLOYS
INTERMETALLIC COMPOUNDS
EXPERIMENTAL DATA
CORROSION FATIGUE