Perspective nickel alloys of the Ni-Cr-W-C type suitable for use at high temperatures - Part II. Kinetics of changes in microstructure and in mechanical properties

This work was aimed at gaining insight into structure phenomena in model ni ckel alloys and finding relations between their structure and mechanical pr operties. Quantitative stereological analysis was used to determine the str ucture parameters. The structure processes were described, based on kinetic dependences of the parameters. The control mechanisms of particle coarseni ng were described for the individual model alloys. The well-known correlati ons between the free interparticle spacing of the hardening particles and t he precipitation hardening were used. Four theoretical models were tested a nd a good agreement between the calculated and observed hardening Values wa s obtained. The two theoretical approaches to the kinetics of the structure phenomena are applicable in technical practice when predicting material pr operties during long-term operation of the facility.