The Influence of Hold Times on Fatigue Crack Growth of Aluminum Alloys.
Annual technical rept. 1 Jan-31 Dec 77,
TEXAS UNIV AT AUSTIN DEPT OF MECHANICAL ENGINEERING
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The main emphasis during the present contract year has been in four areas 1 The influence of underload times on fatigue crack growth retardation, 2 investigation of crack closure, 3 the influence of crack surface roughness on acoustic energy transmission, and 4 the influence environment has on the fatigue fracture surface. These will be discussed separately.
- Metallurgy and Metallography