Investigación para intentar determinar por medio de la dureza si se ha realizado correctamente el PWHT, con la finalidad de evitar los fallos prematuros en el P91 (archivo de descarga gratuita en la web de EPRI)
Autor: A. Mcgehee y K. Coleman
Nº de paginas :50
Several premature failures have occurred in Grade 91 (P91) materials due to improper post-weld heat treatment (PWHT). Utilities want a method to determine whether proper PWHT was performed properly during the construction or repair of a pressure vessel. Methods of performing field hardness measurements to determine the temperature to which the weldment was exposed during PWHT were investigated by this project, including the effect of different levels of hardness on service life.