Influence of test parameters on the thermal mechanical fatigue behavior of a superalloy

Journal Article · Thu Feb 01 00:00:00 EST 1990 · Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (USA)

DOI:https://doi.org/10.1007/BF02782419· OSTI ID:7074998

Malpertu, J L ^[1]; Remy, L ^[2]

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1. Establissement Technique d' Angers, 49 Montreuil-Juigne (FR)
2. Centre des Materiaux, Ecole des Mines de Paris, UA CNRS 866, BP 87, 91003, Evry Cedex (FR)

The thermal-mechanical fatigue (TMF) behavior of IN-100, a cast nickel-base superalloy, has been investigated with a mechanical strain-temperature loop from 600{degrees}C to 1050{degrees}C (873 to 1323 K). Peak strains were applied at intermediate temperatures, giving simulation of real component parts. Tests with or without a mean strain were used. Other tests involved a longer period or a tensile hold time, and they were compared with conventional in-phase TMF cycles. An interrupted test procedure was used to define a conventional TMF life to 0.3-mm crack depth, as well as a life to 50-{mu}m, crack depth, to characterize the crack initiation period. Some stress-strain hysteresis loops were reported. Thermal-mechanical fatigue life was dependent upon test parameters, while the life to crack initiation was not. Oxidation and microcracks were important in all the tests. These results were compared with those under low cycle fatigue at high temperature.

• OSTI ID: 7074998
• Journal Information: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (USA), Vol. 21:2; ISSN 0360-2133
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
INCONEL ALLOYS
THERMAL FATIGUE
CRACK PROPAGATION
HIGH TEMPERATURE
PARAMETRIC ANALYSIS
TENSILE PROPERTIES
ALLOYS
FATIGUE
MECHANICAL PROPERTIES
NICKEL ALLOYS
NICKEL BASE ALLOYS
360103* - Metals & Alloys- Mechanical Properties
360104 - Metals & Alloys- Physical Properties