Phase Separation in Aged Diffusion-Couples Fe/Fe-40 at%Cr Alloy

被引：0
作者：
Lopez-Hirata, Victor M. [1 ]
Cayetano-Castro, Nicolas [1 ]
Dorantes-Rosales, Hector J. [1 ]
Saucedo-Munoz, Maribel L. [1 ]
Avila-Davila, Erika O. [2 ]
机构：
[1] Inst Politecn Nacl ESIQIE, Mexico City 07051, DF, Mexico
[2] Inst Tecnol Pachuca, Pachuca De Soto Hgo 42080, Mexico
来源：
MATERIALS TRANSACTIONS | 2011年 / 52卷 / 12期
关键词：
iron-chromium alloys; phase separation; diffusion-couple; aging; hardening; SPINODAL DECOMPOSITION;
D O I：
10.2320/matertrans.M2011230
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Diffusion-couples of pure Fe/Fe-40 at%Cr alloy were used to analyze the phase separation process in Fe-Cr alloys. Diffusion-couples were solution treated at 1050 degrees C for 3.6 ks and subsequently aged at 500 degrees C for 3.6-3600 ks. Interdiffusion zones were analyzed by HR-TEM and hardness measurements. The EDS-SEM analysis of solution treated, water-quenched and then aged diffusion-couple permitted to obtain the equilibrium composition of miscibility gap at 500 degrees C to be 14 at% Cr. The HR-TEM analysis of the aged diffusion-couple showed the change in size and volume percentages of precipitates with composition. The hardness measurements of the aged diffusion-couple indicated the age hardening due to the presence of nanometric Cr-rich precipitates in a Fe-rich matrix. [doi:10.2320/matertrans.M2011230]
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页码：2155 / 2158
页数：4
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