Fatigue resistance of duralumin
A 1922 technical report on fatigue resistance of duralumin, an aluminium alloy, issued by NASA's Technical Reports Server as a scientific study for engineers and materials testers. Its pictures are plain black-and-white engineering drawings and photographs: a vertical testing machine, a horizontal loading rig with labelled parts, and a log-scale graph of load against revolutions. A designer could borrow the clean diagrammatic style, the lettered callouts, and the stepped curve graph for technical or industrial layouts.
