Behavior of nickel-base superalloy single crystals under thermal-mechanical fatigue

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)

DOI:https://doi.org/10.1007/BF02646679· OSTI ID:5160389

The thermal-mechanical fatigue behavior of AM1 nickel-base superalloy single crystals is studied using a cycle from 600[degree]C to 1,100[degree]C. It is found to be strongly dependent on crystallographic orientation, which leads to different shapes of the stress-strain hysteresis loops. The cyclic stress-strain response is influenced by variation in Young's modulus, flow stress, and cyclic hardening with temperature for every crystallographic orientation. The thermal-mechanical fatigue life is mainly spent in crack growth. Two main crack-initiation mechanisms occur, depending on the mechanical strain range. Oxidation-induced cracking is the dominant damage mechanism in the lifetime of interest for turbine blades.

• OSTI ID: 5160389
• Journal Information: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States), Journal Name: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States) Vol. 25:1; ISSN 0360-2133; ISSN MTTABN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
AEROSPACE INDUSTRY
ALLOYS
DAMAGE
DATA
EXPERIMENTAL DATA
FATIGUE
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INDUSTRY
INFORMATION
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NUMERICAL DATA
TESTING
THERMAL FATIGUE
TURBINE BLADES