Strain energy density [electronic resource] : Distance criterion for the initiation of hydrogen-induced cracking of Alloy X-750
- Published
- Washington, D.C. : United States. Dept. of Energy, 1991.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- 14 pages : digital, PDF file
- Additional Creators
- United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- A criterion for initiation of subcritical crack growth at blunt notches and sharp defects was developed and applied to hydrogen- induced cracking of the Ni-base superalloy X-750. Onset of crack growth is shown to occur when a critical strain energy density is attained at a distance from the notch and crack tips characteristic of the microstructure along the prospective crack path. Rising load crack growth initiation data were obtained using homogeneous hydrogen precharged notched and fatigue precracked bend specimens. Notch root radius, grain size and hydrogen concentration were varied. Crack growth initiation loads were dependent on both notch root radius and bulk precharged hydrogen concentration. These data were shown to be correlated using a critical strain energy at-a-distance (SEDAD) criterion. Furthermore, an elastic-plastic analysis of the strain energy distributions showed that the critical strain energy density value is attained at one grain diameter from the notch and fatigue precrack tips. Mechanical and microstructural aspects of crack growth process and relevance to hydrogen-induced cracking are discussed.
- Report Numbers
- E 1.99:wapd-t--2961
E 1.99: conf-911003--28
conf-911003--28
wapd-t--2961 - Subject(s)
- Other Subject(s)
- Note
- Published through SciTech Connect.
12/31/1991.
"wapd-t--2961"
" conf-911003--28"
"DE94001905"
Fall meeting of the Minerals, Metals and Materials Society of AIME and Materials Week of the American Society of Metals,Cincinnati, OH (United States),20-24 Oct 1991.
Kearns, J.J.; Hall, M.M. Jr.; Symons, D.M.
Bettis Atomic Power Lab., West Mifflin, PA (United States) - Funding Information
- AC11-93PN38195
AC11-89PN38014
View MARC record | catkey: 14456752