Abstract
A simple and inexpensive test rigfor the determination of basic fatigue data under low cycling frequencies in a corrosive environment is described. The principle involved is one of simple bending using a sliding frame to provide the necessary load cycling, situated over a static tank which contains the operating environment.
Cycling is achieved pneumatically through an air-operated piston and cylinder, and frequencies of from 0·02 to 0·4 Hz are possible with the system. The stress range and ratio are also variable within reasonably wide limits. Some initial results for unwelded and welded plate in low-carbon steels tested in air, artificial sea water and tap water are presented and compare favourably with previously published values.
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