NF ISO 1352, A03-407 (02/2024)

This document specifies the conditions for carrying out torsional fatigue tests, at constant amplitude and nominally elastic stress, on metallic specimens, without deliberately introducing stress concentrations. Tests are generally carried out at room temperature or at an elevated temperature in air by applying pure torque to the specimen around its longitudinal axis. Although the shape, preparation and testing of circular and annular cross-section specimens are described in this document, component testing and other types of specialized testing are not included. Likewise, low-cycle torsional fatigue tests carried out with constant amplitude angular displacement control, which lead to failure after a few thousand cycles, are also excluded.
(Automatic translation from French)