Influence of nickel on 475°C embrittlement of Fe−Cr−Ni alloys: Mössbauer effect study |
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| Authors: | B. Trindade R. Vilar |
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| Affiliation: | 1. Sec??o Autónoma de Engenharia Mecanica da Faculdade de Ciências e Tecnologia da Universidade de Coimbra, P-3000, Coimbra, Portugal
2. Departamento de Engenharia de Materiais do Instituto Superior Técnico, P-1000, Lisboa, Portugal
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| Abstract: | The phenomenon of “475°C embrittlement” of Fe?Cr?Ni alloys with Fe/Cr ratios of 2.7 and 1.05, containing 0.2 and 4 at.% Ni, has been investigated using the Mössbauer effect and hardness measurements. The results show that the addition of nickel to Fe-xCr alloys (x=25 and 45 at.%) increases the transformation rate notoriously in the first hours of aging, the effect of this element being more important for alloys with Fe/Cr=1.05. |
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