Nickel base alloy forged parts

A process for fabricating recrystallized large forged parts having fine grain size and improved toughness and tensile properties, the process comprising:

• (a) providing a body of an alloy selected from one of a nickel-base alloy, an iron-nickel-chromium-molybdenum alloy, a cobalt-chromium-nickel alloy, a nickel-cobalt alloy and a cobalt-base alloy;
• (b) heating said body to a temperature above the recrystallization temperature of the alloy;
• (c) subjecting said body to a first upset forging operation to provide a reduction of at least about 50% of the original length of the body:
• (d) drawing said body after said first upset forging;
• (e) repeating steps (b)-(d) to form a second upset forged body;
• (f) reheating said second upset forged body to a temperature above the recrystallization temperature;
• (g) subjecting the reheated body to a third upset forging operation to provide a reduction of at least about 25% of the original length of the body;
• (h) heating and maintaining said third upset forged body above the recrystallization temperature while subjecting said third upset forged body to a forth upset forging operation to provide a reduction in the length of at least about 75% of the original length of said third upset forged body:
• (i) rapidly cooling said forth upset forged body;
• and
• (j) solution heat treating, quenching and aging said forth upset forged body.