Quantitative microstructural characterisation of Ni-base superalloys

被引：40
|
作者：
Penkalla, HJ [1 ]
Wosik, J
Czyrska-Filemonowicz, A
机构：
[1] Res Ctr Julich, Inst Mat & Proc Energy Syst, D-52525 Julich, Germany
[2] Stanislaw Staszic Univ Min & Met, Fac Met & Mat Sci, PL-30059 Krakow, Poland
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2003年 / 81卷 / 2-3期
关键词：
Waspaloy; TEM; HRTEM; AFM; stereological evaluation;
D O I：
10.1016/S0254-0584(03)00037-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Ni-base superalloy Waspaloy was investigated as candidate material for rotor and disc applications in steam turbines of the next generation. Quantitative metallography has been performed using various microscopic techniques. Transmission electron microscopy (TEM) and atomic force microscopy (AFM) have been applied for a stereological evaluation of the particle size distribution, particle number density and volume fraction of the gamma' precipitates. Waspaloy was investigated after heat treatment and after ageing at relevant application temperature of 700 degreesC. In cooling experiments, the influence of the cooling rate on the gamma' formation and growth was studied. The existence of gamma' nano-stals with a volume fraction < 1.5% was observed. (C) 2003 Published by Elsevier Science B.V.
引用
收藏
页码：417 / 423
页数：7
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