Fatigue Strength of Airplane and Engine Materials (1934)
NASA Technical Reports Server (NTRS) · leaf 36
N.A.C.A. Technical Memorandum ITo. 743 Figs. 11,12 … Figure 11.-Tension vs. number of stress reversal:; for aluaifiaira alloys according to tests "by Johnson and Oherg. 0.1 1 10 100 1000 stress reversals, millions Alloy A heat-treated,with 4.01 Cu 0.22 Si 0.7? Hn 0.57 Mg;cfB=41.6 kg/mm2 " A anneal ad, with 3.94 Cu 0.16 Si 0.67 :.In 0.58 Hgf =23.7 « ■…
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