OBSERVATIONS ON HIGH TEMPERATURE CREEP PROCESSES OF A NICKEL BASE ALLOY BY TRANSMISSION ELECTRON MICROSCOPY
一种镍基合金高温蠕变过程的电子显微镜透射观察

On the basis of the previous paper 1], dislocation structures in the primary and secondary stages of high temperature creep of a nickel base alloy (Ni80Cr20Ti) have been studied by transmission electron microscopy. The observations and analyses have been emphasized on the primary stage. It is shown that, in the primary stage of high temperature creep, a large number of individual dislocations are formed. They generally do not lie on the slip planes. The majority of them are shown to be mixed type dislocations. It is concluded that such kind of dislocations is a product of the combination of climbring of edge dislotions and cross slipping of screw dislocations.