Spinodally decomposed Cu-Ni-Fe alloys of asymmetrical compositions

Some Aspects of Spinodal Decomposition in Spinel Solid Solutions

“…4 of [1] it is shown that the growth rate of the spinodal wavelength depends on composition and is highest for a sample of the critical composition. Similar results were obtained for the metallic system Cu-Ni-Fe [23,24]. It was presumed (see (3)) that the driving force for interdiffusion, i.e.…”

Microstructural evolution of spinodally formed Fe35Ni15Mn25Al25

“…Like the observations of Kato et al [22] on Cu-Ni-Sn alloys, Sato et al [36] noted that in a Fe-30Mn-9Al-0.9C (in wt.%) alloy a substantial increase in yield strength occurred during the early stages of ageing without any significant changes in l. Similarly, in both Cu-Ni-Fe [30] and Cu-Ni-Cr alloys [41,42], l was found to be essentially constant during the early stages of aging during which the strength increases substantially. Interestingly, at longer ageing times, the strength in the Cu-Ni-Fe studied by Livak and Thomas [30] reached a plateau, the beginning of which corresponded to when l started to increase. Sato, Tagawa and Inoue [36] also noted that the increase in l at longer ageing times was not accompanied by any significant changes in the yield strength.…”

“…Sato, Tagawa and Inoue [36] also noted that the increase in l at longer ageing times was not accompanied by any significant changes in the yield strength. Both, Livak and Thomas [30] and Sato et al [36] concluded that the strength was linearly related to A. (As in most studies, Sato et al [36] did not measure A directly, but instead estimated it from the strain amplitude obtained by deconvolution of X-ray diffraction measurements and using (C 11 þ 2C 12 )/C 11 ¼1.)…”

“…Starting with the discovery of the spinodally formed alloy Fe 30 Ni 20 Mn 25 Al 25 (in at. %), several b.c.c.-based spinodally formed alloys have been discovered in the Fe-Ni-Mn-Al system [1,2,17,[31][32][33]37,39].…”

Loss of coherency in spinodally decomposed CuNiFe alloys

“…2 As the structure coarserisinthese spinodal . , alloys, coherent platelets form on the {100} planes because this morphology minimizes the elastic strain energy of the two phase microstruct~re.3 After long aging times at high temperatures, the coherent platelets lose coherency as interfacialdis10cations form.…”