PLANE STRAIN FRACTURE TOUGHNESS OF 2219-T87 ALUMINUM ALLOY AT ROOM AND CRYOGENIC TEMPERATURES.
Technical research rept.,
PITMAN-DUNN RESEARCH LABS FRANKFORD ARSENAL PHILADELPHIA PA
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The tensile properties and plane strain fracture toughness of 12 and 1 inch thick 2219-T87 aluminum alloy were determined as a function of testing at temperatures from room to -423 F. The tensile and yield strengths of this material show a gradual increase as the testing temperature is decreased to -423 F while the elongation and reduction of area remain essentially unchanged. The plane strain fracture toughness of this material is relatively insensitive to testing temperature and shows only a slight increase with decreasing testing temperature. Specimens machined so that the crack propagation is perpendicular to the rolling plane show somewhat higher values of plane strain fracture toughness than when crack propagation is parallel to the rolling plane. The plane strain fracture toughness of the 1 inch thick 2219-T87 aluminum alloy was somewhat lower than that of the 12 inch thick plate. Illustrative examples are presented on using these parameters in design. Author
- Metallurgy and Metallography