Effect of Overheating on Creep-rupture Properties of S-816 Alloy at 1,500 Degrees F
Effect of Overheating on Creep-rupture Properties of S-816 Alloy at 1,500 Degrees F

Author: John P. Rowe

Publisher:

Published: 1957

Total Pages: 75

ISBN-13:

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The effects of overheats to temperatures of 1650, 1800, 1900, and 2000 F were evaluated in terms of the changes in creep-rupture characteristics at 1500 F of S-816 alloy under stresses within the range of rupture strengths of the alloy for 100 to 1000 hours. Overheat periods were predominantly of 2-minute duration and were applied cyclically at approximately 5- or 12-hour intervals. The possible damage from overheating was believed to include internal metal structure changes induced by exposure to the higher temperatures and loss of life by creep if stress was present during the overheats.

Effect of Overheating on Creep-rupture Properties of HS-31 Alloy at 1,500 Degrees F
Effect of Overheating on Creep-rupture Properties of HS-31 Alloy at 1,500 Degrees F

Author: John Paul Rowe

Publisher:

Published: 1957

Total Pages: 702

ISBN-13:

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An investigation of overheating HS-31 alloy to temperatures of 1,650 degrees, 1,800 degrees, 1,900 degrees, and 2,000 degrees F during the course of rupture tests 1,500 degrees F was carried out. The overheating was applied periodically for 2 minutes in most of the tests. The intent was to develop basic information on the effect of overheats on creep- rapture properties in order to assist in the evaluation of damage from overheats during gas- turbine operation.

Effect of Overheating on Creep-rupture Properties of M-252 Alloy
Effect of Overheating on Creep-rupture Properties of M-252 Alloy

Author: John P. Rowe

Publisher:

Published: 1958

Total Pages: 83

ISBN-13:

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A study was carried out of the influence of periodic overheats of 2-minute duration to temperatures of 1,650, 1,800, 1,900, and 2,000 degrees F on the creep-rupture properties of M-252 alloy at 1,500 degrees F. The conditions of the experiments had been selected to provide basic information applicable to estimation of the effects of overheating on creep-rupture performance of gas-turbine parts. The overheats were conducted both with the stress removed during overheating and with stress present.

Creep, Rupture, and Notch Sensitivity Properties of S-816 Alloy Up To 1650 F Under Fatigue and Static Stress
Creep, Rupture, and Notch Sensitivity Properties of S-816 Alloy Up To 1650 F Under Fatigue and Static Stress

Author: F. Vitovec

Publisher:

Published: 1956

Total Pages: 21

ISBN-13:

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Fatigue, rupture, and creep data obtained under various combinations of mean and alternating stress are presented for S-816 alloy at temperatures of 75, 1350, 1500, and 1650 F. Tests were performed under axial stress on unnotched specimens and specimens having theoretical stress concentration factors of 2.4 and 3.4. The data are presented as S-N curves and stress range diagrams to show the effect of specimen notch, temperature, ratio of alternating-to-mean stress, and stress magnitude on the fatigue and creep properties. The role of both creep and fatigue as design factors and the relation of notch sensitivity to loading conditions are discussed with particular reference to temperature and ratio of alternating-to-mean stress.