Cyclic softening and hardening behavior of a nickel-base superalloy

Journal Article · Sat Apr 15 00:00:00 EDT 1995 · Scripta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-716X(94)00018-D· OSTI ID:55442

Choe, B H ^[1]; Lee, H C ^[2]

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1. Korea Inst. of Machinery and Metals, Changwon (Korea, Republic of)
2. Seoul National Univ. (Korea, Republic of). Dept. of Metallurgical Engineering

The interaction of dislocations with strengthening {gamma}{prime} and/or{gamma}{double_prime} precipitates is known to control the cyclic stress response of Ni-base superalloys. More information on the micromechanism of deformation is needed to fully understand the cyclic stress behavior of this type of alloys. In this study, the cyclic stress response of directionally solidified (DS) Mar-M247LC superalloy is investigated as a function of test temperature and {gamma}{prime} particle size. The role of dislocation behavior in the cyclic hardening and softening of this alloy is also discussed.

• OSTI ID: 55442
• Journal Information: Scripta Metallurgica et Materialia, Vol. 32, Issue 8; Other Information: PBD: 15 Apr 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
NICKEL BASE ALLOYS
FATIGUE
DISLOCATIONS
TUNGSTEN ALLOYS
COBALT ALLOYS
ALUMINIUM ALLOYS
TANTALUM ALLOYS
HAFNIUM ALLOYS
TITANIUM ADDITIONS
MOLYBDENUM ADDITIONS
BORON ADDITIONS
ZIRCONIUM ADDITIONS
CARBON ADDITIONS
SAMPLE PREPARATION
HEAT TREATMENTS
PRECIPITATION
STRESSES
TEMPERATURE DEPENDENCE
HARDENING
DEFORMATION