Effect of heat treatments on the mechanical properties of CuNiFe spinodal alloys
Non-conventional 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 intergranularly. 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. The calculated values for the yield strength using Dahlgren's theory is shown to be in complete agreement with the measured values for the yield strength.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7260576
- Report Number(s):
- LBL-5791
- Resource Relation:
- Other Information: Thesis
- Country of Publication:
- United States
- Language:
- English
Similar Records
Microstructural change in austenitic Fe-30.0wt%Mn-7.8wt%Al-1.3wt%C initiated by spinodal decomposition and its influence on mechanical properties
Spinodal Decomposition and Order-Disorder Transformation in a Water-Quenched U-6wt%Nb Alloy