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RESEARCH PAPERS

Tensile Property Improvements of Spinodal Cu-15Ni-8Sn by Two-Phase Heat Treatment

[+] Author and Article Information
T. J. Louzon

Bell Laboratories, Murray Hill, N. J. 07974

J. Eng. Mater. Technol 104(3), 234-240 (Jul 01, 1982) (7 pages) doi:10.1115/1.3225070 History: Received May 19, 1981; Online September 15, 2009

Abstract

A heat treatment has been developed which produces significant improvements in the tensile properties of Cu-15Ni-8Sn spinodal alloy. The treatment involves solution heat treatment in the two-phase region rather than the single-phase region normally used. After quenching and aging, increased strength and ductility of the alloy over single phase solution heat-treated and aged values were found. The mechanical properties obtained were superior to any previously observed for material of the compositions studied in the solution treated, quenched, and aged condition. Also, the alloys’ transformation kinetics were greatly slowed by the two phase heat-treatment. It is suggested that the increase in strength and slow kinetics of transformation observed are caused by grain size effects and by grain boundary modifications. Resistivity data and etching response corroborate these arguments.

Copyright © 1982 by ASME
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