Three-point bend tests were conducted to examine the geometry dependence of JIc in two intermediate-strength aluminum alloys, 2024-T351 and 7005-T6351. The amounts of crack growth at selected points on the load-versus-deflection curves were delineated using a heat tinting technique. Resistance curves of J-versus-crack extension were constructed to facilitate determination of JIc at incipient crack movement. The through-thickness variation in fracture toughness of a 7.6-cm-thick plate of 7005 aluminum was determined and correlated with fractographic and metallographic observations. The current JIc measurements from subsized specimens of 7005 aluminum are compared with previous KIc characterizations using linear-elastic, full-thickness specimens.
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April 1976
Research Papers
Initial Crack Extension in Two Intermediate-Strength Aluminum Alloys
C. A. Griffis,
C. A. Griffis
Strength of Metals Branch, Engineering Materials Div., Naval Research Lab., Washington, D.C.
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G. R. Yoder
G. R. Yoder
Strength of Metals Branch, Engineering Materials Div., Naval Research Lab., Washington, D.C.
Search for other works by this author on:
C. A. Griffis
Strength of Metals Branch, Engineering Materials Div., Naval Research Lab., Washington, D.C.
G. R. Yoder
Strength of Metals Branch, Engineering Materials Div., Naval Research Lab., Washington, D.C.
J. Eng. Mater. Technol. Apr 1976, 98(2): 152-158 (7 pages)
Published Online: April 1, 1976
Article history
Received:
May 23, 1974
Revised:
May 24, 1975
Online:
August 17, 2010
Citation
Griffis, C. A., and Yoder, G. R. (April 1, 1976). "Initial Crack Extension in Two Intermediate-Strength Aluminum Alloys." ASME. J. Eng. Mater. Technol. April 1976; 98(2): 152–158. https://doi.org/10.1115/1.3443358
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