Phase transformation behavior of Cu-10Ni-3Al-0.8Si alloy

Shen, Leinuo, Li, Zhou, Zhao, Yuyuan ORCID: 0000-0003-2356-8435, Wang, Yang, Dong, Qiyi and Wang, Mengying
(2016) Phase transformation behavior of Cu-10Ni-3Al-0.8Si alloy. MATERIALS CHEMISTRY AND PHYSICS, 173. pp. 421-428.

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Microstructure evolution of solution treated Cu-10Ni-3Al-0.8Si alloy aged at different temperatures was investigated and different transformation products were observed: modulated structure resulting from spinodal decomposition, L12 ordering of matrix, continuous Ni3Al precipitates, continuous δ-Ni2Si precipitates and discontinuous precipitates. Modulated structure, L12 ordering of matrix and micro-twins formed initially at 450 °C, while continuous Ni3Al and δ-Ni2Si particles precipitated soon. Increasing temperature led to the formation of discontinuous precipitates, dissolution of Ni3Al and cellular decomposition. The alloy showed excellent over-aging resistance at 450 °C because the Ni3Al and δ-Ni2Si precipitates grew very slowly and the addition of silicon hindered the precipitation of the coarsening NiAl phase.

Item Type: Article
Uncontrolled Keywords: Alloys, Precipitation, Electron microscopy, Microstructure
Depositing User: Symplectic Admin
Date Deposited: 28 Apr 2016 10:24
Last Modified: 23 Feb 2023 05:18
DOI: 10.1016/j.matchemphys.2016.02.033
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