Evaluation of high-temperature behavior of CMSX4 + yttrium single-crystal nickel-base superalloy

Journal Article · Sun Aug 01 00:00:00 EDT 1993 · Journal of Materials Engineering and Performance; (United States)

DOI:https://doi.org/10.1007/BF02661732· OSTI ID:5305975

Marchionni, M; Maldini, M ^[1]; Goldschmidt, D ^[2]

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1. Via Induno, Milano (Italy)
2. MTU, Muenchen (Germany)

CMSX4 + Y, a highly strengthened rhenium-containing second-generation single-crystal nickel-base superalloy, has been studied by creep, low-cycle, and thermomechanical fatigue in the temperature range 500 to 1,100 C. The alloy exhibits good high-temperature mechanical properties that are superior or comparable to other single-crystal superalloys. Thermomechanical fatigue resistance is equivalent to low-cycle fatigue and is cycle-shape dependent. High-temperature mechanical properties have been studied using life prediction relationships that are frequently used for creep and low-cycle fatigue data evaluation. Examination of fracture surfaces revealed that fracture induced by creep damage is internal and starts from pore-initiated cracks; however, fatigue damage starts on the external surface and propagates inward in stage 2 mode.

• OSTI ID: 5305975
• Journal Information: Journal of Materials Engineering and Performance; (United States), Vol. 2:4; ISSN 1059-9495
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
NICKEL BASE ALLOYS
MECHANICAL PROPERTIES
YTTRIUM
METALLURGICAL EFFECTS
EXPERIMENTAL DATA
HEAT RESISTING ALLOYS
SERVICE LIFE
YTTRIUM ADDITIONS
ALLOYS
DATA
ELEMENTS
HEAT RESISTANT MATERIALS
INFORMATION
LIFETIME
MATERIALS
METALS
NICKEL ALLOYS
NUMERICAL DATA
TRANSITION ELEMENTS
YTTRIUM ALLOYS
360103* - Metals & Alloys- Mechanical Properties