High temperature multiaxial low cycle fatigue of CMSX-2 Ni-base single crystal superalloy

Journal Article · Tue Apr 01 04:00:00 EST 1997 · Journal of Engineering Materials and Technology

DOI:https://doi.org/10.1115/1.2805988· OSTI ID:483648

Kanda, Mitsuru; Sakane, Masao; Ohnami, Masateru ^[1]; Hasebe, Tadashi ^[2]

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1. Ritsumeikan Univ., Kusatsu, Shiga (Japan). Dept. of Mechanical Engineering
2. Doshisha Univ., Kyoto (Japan). Dept. of Mechanical Engineering

This paper describes studies of the tension-torsion multiaxial low cycle fatigue of CMSX-2 Ni-base single crystal superalloy. Tension-torsion low cycle fatigue tests were carried out at 1,173 K using CMSX-2 hollow cylinder specimens aligned with the {l_brace}001{r_brace} axis. Several multiaxial strain and stress parameters were applied to the experimental data to examine the suitability of the parameters to life prediction. All the strain parameters proposed so far gave a large scatter of the data correlation. Discrepant data correlation with the strain parameters resulted from the anisotropic stress response due to the crystallographic texture. Larger Mises equivalent stress was applied in torsion tests than in tension tests at the same Mises strain. However, Mises stress and the equivalent stress based on crack opening displacement gave a satisfactory data correlation. This study developed a new equivalent strain, taking account of the anisotropy of the elastic constants, which correlates the multiaxial low cycle fatigue data with a small scatter.

• Sponsoring Organization: USDOE
• OSTI ID: 483648
• Journal Information: Journal of Engineering Materials and Technology, Journal Name: Journal of Engineering Materials and Technology Journal Issue: 2 Vol. 119; ISSN 0094-4289; ISSN JEMTA8
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
36 MATERIALS SCIENCE
CHROMIUM ALLOYS
COBALT ALLOYS
CRACKS
EXPERIMENTAL DATA
FATIGUE
GAS TURBINE ENGINES
MOLYBDENUM ADDITIONS
NICKEL BASE ALLOYS
S-N DIAGRAM
SERVICE LIFE
STRAINS
STRESSES
TANTALUM ALLOYS
TENSILE PROPERTIES
TORSION
TUNGSTEN ALLOYS