Crack Initiation and Propagation in Metals in Liquid Mercury Using Fracture Mechanics.
ARMY ARMAMENT RESEARCH AND DEVELOPMENT COMMAND WATERVLIET NY LARGE CALIBER WEAPON SYSTEMS LAB
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Fracture mechanics is a useful tool in the study of sub-critical crack growth. This report presents a summary of the results of several recent fracture mechanics studies of liquid metal embrittlement. Specific topics include crack growth measurements under cyclic loading conditions in 6061-T651 alloy embrittled by liquid mercury. The effect of mean stress on fatigue crack growth in a high strength-low alloy steel in mercury is discussed. Crack growth studies under static loading conditions at various temperatures in both 6061-T651 aluminum and 7030 alpha brass embrittled by mercury are also presented. Finally, some experiments on mercury wetted 7030 alpha brass in Mode III loading pure shear are presented. The results are discussed in relation to transport mechanisms. Author
- Metallurgy and Metallography