DETERMINATION OF THE FRACTURE TOUGHNESS OF INHOMOGENEOUS THREE-LAYER FUSION CLADDINGS ON COMPACT SPECIMENS

摘要

We propose a method for the evaluation of the fracture toughness (K_(1C)) of multilayer fusion claddings on compact specimens at elevated temperatures (20, 70, and 300 deg C) with cladding (in the slot) of three layers of materials with gradually increasing crack resistance. As the testing temperature increases, the value of K_(1C) decreases for harder and stronger fusion claddings and, vise versa, increases for less strong and softer materials.