Heat treatments for improved mechanical properties of CuNiFe spinodal alloys
Nonconventional heat treatments were designed to produce spinodal microstructures in two CuNiFe alloys for the improvement of mechanical properties with a reduction in total aging time. The microstructures were characterized by measuring the Curie temperature to determine the composition of the NiFe rich phase, and by TEM to measure the spinodal wavelength. In most cases the material failed integranularly. However, it was only after the longer aging times that any discontinuous grain boundary coarsening was observed. The measured yield strength of both alloys was found to be proportional to the difference in lattice parameter between the two phases and independent of wavelength and nearly independent of volume fraction.
- Research Organization:
- Univ. of California, Berkeley
- OSTI ID:
- 6517290
- Journal Information:
- Metall. Trans., A; (United States), Vol. 9:9
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COPPER ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
IRON ALLOYS
NICKEL ALLOYS
AGING
CRACKS
ELONGATION
FATIGUE
GRAIN BOUNDARIES
HARDNESS
HEAT TREATMENTS
LATTICE PARAMETERS
TRANSMISSION ELECTRON MICROSCOPY
YIELD STRENGTH
ALLOYS
CRYSTAL STRUCTURE
ELECTRON MICROSCOPY
MICROSCOPY
360103* - Metals & Alloys- Mechanical Properties
360102 - Metals & Alloys- Structure & Phase Studies