It is important to note that tensile properties are influenced not only by heat treatment, but also by control of structure during thermomechanical processing. The graph shows the effects of temperature and grain size on tensile properties of Incoloy 901 forgings in the solution-treated, stabilized, and aged condition. (AC = air cooled.)
Specifically, the graph shows the effect of solution temperatures from 1750 to 2000°F and grain sizes ranging from ASTM 2 to 12 on tensile properties of Incoloy 901 processed using this method. The high-cycle fatigue strength of Incoloy 901 doubled as a result of the reduction in grain size from ASTM 2 to 12. The low-cycle fatigue also improved greatly with decreasing grain size.
Volume 4D, Heat Treating of Irons and Steels ⇒ Heat Treated High-Alloy Steels ⇒ Heat Treating of Precipitation-Hardenable Stainless Steels and Iron-Base Superalloys ⇒ Iron-Nickel Precipitation-Hardenable Superalloys
