Research Progress and Analysis on Defect Characteristic and Life Estimation of Powder Metallurgy Superalloy

The research advance of defects speciality and life prediction of powder metallurgy superalloy are analyzed,such as the defects source and its influence on life,the influence of defects on crack origin and expanding,the method and model of life prediction of powder metallurgy superalloy.The different life prediction methods and the problem of life prediction of powder metallurgy superalloy are analyzed.It is very important to express the defects quantificationaly and establish the life prediction method,which can reflect the characteristic of powder metallurgy superalloy.