ELEVATED-TEMPERATURE COMBINED STRESS-RUPTURE PLUS FATIGUE STRENGTH OF WASPALOY HAVING DIFFERENT AGING TREATMENTS AND/OR MOLYBDENUM CONTENTS

摘要

Ah investigation was conducted to determine if the combined stress-rupture plus fatigue strengths of three groups of Waspaloy with different aging treatments and/or molybdenum contents could be correlated with their resultant stress-rupture ductilities and notch-rupture strengths.nFatigue tests were run at 1500° F with direct tensile cyclic stresses superimposed upon direct tensile mean stresses. Mean tensile stresses were selected from 1500° F stress-rupture data to produce stress-rupture failure times of about 10, 100, and 500 hours. Cyclic tensile stress levels were chosen to equal 12.5 to 90 percent of the mean tensile stresses.