AN INVESTIGATION OF THE INFLUENCE OF RESIDUAL STRESSES AND HETEROGENEOUS YIELDING ON BRITTLE FRACTURE.
Final rept. 15 Jun 61-30 Apr 64,
ILLINOIS UNIV URBANA DEPT OF THEORETICAL AND APPLIED MECHANICS
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The problem of brittle fracture at low stresses in mild steel was separated into three phases a measurement of fracture toughness for initial crack extension from an artificial fatigue crack using concepts of linear elastic fracture mechanics, b measurement of fracture toughness for a running crack and for crack arrest, and c measurement of the reduction in fracture toughness for initial crack extension caused by one or a combination of embrittling factors including residual welding stresses, heat affected zone, compressive prestrain, hydrogen, irradiation and possibly certain atmospheres. Author
- Metallurgy and Metallography