The self-diffusion of Niobium.

Report year runs ends June 30.

Statistical properties of fast Fourier transform coefficients computed from real-valued, covariance-stationary, periodic random sequences /

"July 1976."

Self-diffusion of metals and associated phenomena :

"Contract AT-30-1-GEN-367."

Nucleation of voids in metals during diffusion and creep /

Experimental evidence is presented which proves that voids formed during diffusion in brass are heterogeneously nucleated. The nuclei appear to be oxide particles, probably ZnO. When these are removed by re-melting, voids practically do not form upon subsequent dezincification. Brass which had been freed of void nucleation catalysts exhibited a considerably reduced tendency for grain boundary cracking during creep, and increased stress-rupture life.

Organizing the product-planning function.

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