The Precipitation and Strengthening Mechanism of Cu-Ni-Si-Co Alloy-Reference-Cited by-同舟云学术

The Precipitation and Strengthening Mechanism of Cu-Ni-Si-Co Alloy

Published:2013-03 Issue: Volume:749 Page:294-298
ISSN:1662-9752
Container-title:Materials Science Forum
language:
Short-container-title:MSF

Author:

Wang Qiang Song¹,Xie Guo Liang¹,Mi Xu Jun¹,Xiong Bai Qing¹,Xiao Xiang Peng¹

Affiliation:

1. General Research Institute for Non-Ferrous Metals

Abstract

The precipitates, mechanical properties and strengthening effect of Cu-Ni-Si,Cu-Ni-Si-Co0.8 and Cu-Ni-Si-Co1.9 alloys are investigated. It is concluded from the TEM and XRD analysis that the strengthening of Cu-Ni-Si-Co alloy is mainly attributed to precipitates of both Ni2Si and Co2Si phases, with the same structures and very close lattice parameters. The addition of 1.9 wt% Co barely affects the precipitation process of Ni2Si or Co2Si, and may not be beneficial for enhancing the strength. The strengthening of Cu-Ni-Si-Co alloy is determined by the Orowan mechanism, and a critical precipitate radii rc about 1.5 nm corresponding to the peak strength is obtained through the theoretical analysis. It can be deduced that the peak strength of aged Cu-Ni-Si-Co alloy is obtained with the microstructures containing metastable phase and Ni2Si (or Co2Si) precipitates.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

https://www.scientific.net/MSF.749.294.pdf

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