Abstract
The properties and structure of age hardenable Cu-Ti alloys have been studied extensively to assess their suitability as a substitute for the toxic and expensive Cu-Be alloys. The earlier studies reported a sharp increase in hardness and strength and marked decrease in electrical resistivity in solution treated Cu-Ti alloys at Ti contents greater than 4.0 wt% and it was attributed to fine scale precipitation in the form of modulations in Cu-4.5Ti and Cu{sub 4}Ti, {beta}{sup 1} precipitate in Cu-5.4Ti alloys, formed during quenching itself. Further, such sharp changes were not observed in the peak aged condition due to uniform precipitation of Cu{sub 4}Ti, {beta}{sup 1} phase in all the four Cu-Ti alloys. However, the effect of solute content on the lattice parameter of {alpha}-Cu has not been investigated. The variation of lattice parameter of {alpha}-Cu with Ti content in solution treated (ST) and ST + peak aged conditions is presented in this paper.
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