Size Requirements for Fatigue-Cracked Fracture Toughness Screening Specimens.
Final rept. Aug 73-Dec 74,
METAL PROPERTIES COUNCIL INC HELLERTOWN PA
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Aluminum, titanium and steel alloys were selected on the basis of their strengthtoughness properties for the purpose of investigating the performance of a proposed fatigue-cracked fracture toughness screening specimen. Specimens of varying thicknesses and widths were tested with the largest specimen of each alloy satisfying the minimum size requirements according to ASTM-E-399-74 specifications. The results of this program demonstrate the feasibility of the proposed specimen configuration with lowest width to thickness ratio showing the best correlation between the net-fracture strength and plane strain fracture toughness K sub I sub C. Further investigation is warranted to assess the effects of specimen eccentricity and other limitations related to relative toughness of the material.
- Metallurgy and Metallography