Low temperature copper solubilities in Fe-Cu-Ni
Miller, M.K., Russell, K.F., Pareige, P.J., Starink, M.J. and Thomson, R.C. (1998) Low temperature copper solubilities in Fe-Cu-Ni. Materials Science and Engineering A, 250, (1), 49-54. (doi:10.1016/S0921-5093(98)00535-8).
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An atom probe characterization of the copper concentration in the matrix of a model Fe–1.1at.%Cu–1.4% Ni alloy has been performed after isothermal ageing for various extended times at low temperatures. The matrix copper concentrations from material annealed at 500, 550 and 600°C are approximately 10% lower than the equilibrium values predicted from the Thermocalc™ program with the Kaufman database. Isothermal annealing for 4000 h at either 400 or 300°C was not sufficient to attain the equilibrium copper concentration. The kinetics of copper precipitation was investigated with the Starink-Zahra model derived for nucleation and growth reactions and a good fit with the atom probe data was found for an activation energy of 250 kJ mol−1.
|Keywords:||solubility, atom probe field ion microscopy, Fe–Cu|
|Subjects:||T Technology > TN Mining engineering. Metallurgy|
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences
|Date Deposited:||01 Feb 2007|
|Last Modified:||27 Mar 2014 18:11|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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