PhyBaL_CHT - Short-time procedures for determining the fatigue properties of steel

Short time procedures to characterize the fatigue properties of metallic materials are of great interest to science and industry. Such procedures help to calculate the fatigue properties of metals rapidly and precisely, and therefore significantly reduce experiment time and costs. The short time procedure PhyBaL_CHT establishes that for each cycle of a cyclic indentation test, we can measure the plastic indentation depth amplitude h_a,p and so determine the resulting h_a,p—N curves. With the h_a,p—N curves we can determine the materials’ cyclic properties, e.g. the cyclic hardening potential_CHT (e_II). In the project we compared the cyclic properties determined by PhyBaL_CHT to the fatigue properties resulting from conventional fatigue tests under cyclic compressive stresses. We found that the h_a,p—N curves of the cyclic indentation tests correlated to cyclic deformation curves of fatigue tests under uniaxial cyclic compressive stresses, and could therefore be used to determine the cyclic properties of materials.

Publication:

Cyclic hardness test PHYBAL_CHT – Short-time procedure to evaluate fatigue properties of metallic materials