EFFECTS OF VARIOUS AGING HEAT TREATMENTS-ANDnSOLUTION-ANNEALING AND AGING HEAT TREATMENTS ON TENSILE, CREEP, AND STRESS-RUPTURE STRENGTHS OF INCONEL X SHEET TO TEMPERATURES OF 1,400° F

摘要

The tensile strength, the 0.2-percent creep strength in 5 and 10 hours, the 10- and 100-hour stress-rupture strength, and the minimum creep rate of inconel X sheet at 1,000°, 1,200°, and 1,400° F were determined for three aging and three solution-annealing and aging treat-ments. The best tensile strengths were provided by the aging treatments. The aging treatments also had the highest 0.2-percent creep strength in 5 and 10 hours and 10-hour stress-rupture strength at 1,000°, 1,200°, and 1,400° F. The solution-annealing and aging heat treatments had the best 100-hour stress-rupture strength at 1,200° F. At 1,400° F test temperature, the aging treatment at 1,400° F for 1 hour had the superior 100-hour stress-rupture strength. The lowest minimum creep rates at test temperatures of 1,000° and 1,200° F were obtained by aging at 1,500° F for 20 hours and the 2-hour solution-annealing and aging treat¬ments, respectively. At 1,400° F the minimum creep rates were nearly the same for all heat treatments.