Corrosion Embrittlement of Duralumin III Effect of the Previous Treatment of Sheet Material on the Susceptibility to This Type of Corrosion
This is a 1928 NACA technical note by the National Advisory Committee for Aeronautics on corrosion embrittlement of duralumin, a high-strength aluminium alloy used in aircraft, and its test results were published for aeronautical engineers and researchers. The pictures are plain black-and-white metallurgical micrographs, bar charts of tensile strength and elongation, and a line graph of load against elongation, all in technical report layouts. A designer might take their stark grid tables and grainy magnified textures as period scientific documentation.
