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14904 documents, page 1 of 1491

The effect of surface roughness upon 25 ST aluminum alloy subjected to repeated tensile stresses above the proportional limit

This thesis document was issued under the authority of another institution, not NPS. At the time it was written, a copy was added to the NPS Library collection for reasons not now known. It has been included in the digital archive for its historical value to NPS. Not believed to be a CIVINS (Civilian Institutions) title. Fatigue tests were conducted on 54specimens of 25 ST aluminum alloy for the purpose of determining the effect of surface roughness on the fatigue life of the material wh...

Indium replica for metallurgical examination

Approved for public release; distribution is unlimited The work herein described was accomplished in the Solid States Section of the Physics Division at the Oak Ridge National Laboratory during June, July and August of 1948. The purpose of this work was to discover a feasible technique for making metallurgical examinations of highly radioactive samples. The solution of this problem was sought through the use of a replica technique. Lieutenant Commander, United States Navy

Microwave mixers

Approved for public release; distribution is unlimited Commander, United States Navy