Fabrication Effects Upon the Structure and Properties of Solid Solution Strengthened High Temperature Alloys

Samples from production sheets of several solid-solution strengthened high temperature alloys were strained by 10 percent and 20 percent and then heat treated at 1040°C (1900°F) and 1120°C (2050°F) to simulate conditions experienced during the manufacture of hardware items. The alloys used in the study were HASTELLOY® alloy X, HAYNES® alloy No. 230, HAYNES alloy No. 188 and INCONEL® alloy 617. Mechanical properties were measured and compared to those of solution annealed material. The microstructure associated with each fabrication cycle was characterized based upon optical microscopy. The variations observed are reported herein.