From the list below, select three metallurgical/processing techniques that are employed to enhance the creep resistance of metal alloys. a. Increasing the grain size or producing a grain structure with a preferred orientation.
b. Hardening (carburizing, nitriding) or shot peening
c. Anneal the metal alloy
d. Solid solution alloying
e. Polishing the surface to remove stress amplification sites
f. Dispersion strengthening by using an insoluble second phase
g. Unidirectional solidification of alloys