1. Hunter, M. S., andFricke, W. G., Jr., “Metallographic Aspects of Fatigue Behaviour of Aluminum,”ASTM Proc.,54 (154),717–732;discussion, 733–736 (1954).
2. Anctil, A. A., Kula, E. B., andDiCesare, E., “Electric Potential Technique for Determining Slow Crack Growth,”Ibid.,,63,799–808 (1963).
3. Srawley, J. E., and Brown, W. F., Jr., Fracture Toughness Testing, NASA TN D-2599 (1965).
4. Lyst, J. O., andBabilon, C. F., “Detecting Fatigue Cracks in Notched Fatigue Specimens by Changes in Electrical Resistance,”Matl. Rsch. Std.,2 (6),485 (1962).
5. Rpt. No. He-988;J. Carlsson,1962