Abstract
The construction of an apparatus for low-temperature fatigue tests in vacuum is described. The electromagnetic system used for generating dynamic loads makes it possible to test flat specimens in alternating symmetrical bending at a 50 cps frequency. A vacuum of the order of 5 · 10−9 mm Hg can be produced by the evacuating system which includes a hydrogen condensation pump. The specimens are cooled with liquid nitrogen. Some tentative data on the influence of vacuum and low temperatures on the fatigue strength of stainless steel are reported.
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