On the precipitation strengthening of Cu–2.6Ni–0.6Si–0.6Cr bronzes

A thermodynamic simulation of phase equilibria in the Cu–Ni–Si–Cr system has been carried out using a FactSage program package (version 7.0). The structure and phase composition of the Cu–2.6Ni–0.6Si–0.6Cr bronze have been studied in the quenched and additionally aged (under various conditions) stat...

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Bibliographic Details
Published in:Physics of metals and metallography 2017-08, Vol.118 (8), p.795-801
Main Authors: Kareva, N. T., Yakovleva, I. L., Samoilova, O. V.
Format: Article
Language:English
Subjects:
Alloys
Bronzes
Chemistry and Materials Science
Copper
Electric properties
Electrical resistivity
Intermetallic compounds
Materials Science
Metallic Materials
Microhardness
Nickel
Nickel silicide
Phase composition
Phase equilibria
Precipitates
Precipitation (Meteorology)
Precipitation hardening
Quenching
Silicides
Silicon
Strength and Plasticity
Thermodynamics
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Summary:A thermodynamic simulation of phase equilibria in the Cu–Ni–Si–Cr system has been carried out using a FactSage program package (version 7.0). The structure and phase composition of the Cu–2.6Ni–0.6Si–0.6Cr bronze have been studied in the quenched and additionally aged (under various conditions) states. Precipitates of the chromium silicide Cr 3 Si have been revealed in the alloy both in the quenched and aged states. Particles of nickel silicide Ni 2 Si 0.05–0.5 μm in size appear upon the precipitation hardening both homogeneously and heterogeneously (on particles of previously formed chromium silicides). The microhardness ( HV ) and the electrical resistivity of the experimental samples have been determined after conducting processes of precipitation strengthening.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X17080075