LIU Zhiguo CHEN Yong CAO Yanni Nanjing University
,
Nanjing
,
ChinaZHU Zhengsheng Shaanxi Iron and Steel Institute
,
Xi'an
,
China Professor
,
Dept.of Physics
,
Nanjing
,
University
,
Nanjing 210008
,
China
金属学报(英文版)
The microstructural evolution and precipitation hardening of an Elinvar alloy doped with Ti and Al during isothermal aging at 700℃ have been investigated by atom probe field ion microscopy and microhardness measurements.The γ′ precipiates are spherical and coherent with the matrix.The chemical composition of the precipitates are(Ni_(0.53)Fe_(0.47)_3 (Ti_(0.(?))Al_(0.4)). During aging,a Lifshitz-Wagner type dissolution and coarsening reaction of the precipitates has been observed,The hardness of the material varies with the aging time and reaches maxi- mum when the average diameter of the precipitates was about 11 nm.
关键词:
Elinvar alloy
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