Microstructure Evolution during Thermal Aging of Fe-Cu Alloys

Jiu Zhou Zhao; Qing Liang Wang

doi:10.4028/www.scientific.net/AMR.488-489.164

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 488-489Microstructure Evolution during Thermal Aging of...

Microstructure Evolution during Thermal Aging of Fe-Cu Alloys

Abstract:

Aging of Fe-Cu alloys or steels containing copper may result in the formation of the dispersion of nanometric precipitates in the matrix and, thus, causes a great increase in the strength of the alloys. A model is developed describing the aging process of Fe-Cu alloys. The model is first satisfactorily verified by comparing with the reported experimental results, and then applied to calculate the microstructure evolution during aging a Cu-Fe alloy. The numerical results demonstrate that the nucleation of the precipitates occurs after a period of incubation. Since that time on the microstructure evolution is the result of the concurrent action of nucleation, growth/shrinkage and structural transformation of the precipitates. In the late stage of aging almost all the precipitates are of 9R structure. The mean particle radius varies linearly with the cube root of time

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Periodical:

Advanced Materials Research (Volumes 488-489)

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164-168

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https://doi.org/10.4028/www.scientific.net/AMR.488-489.164

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Online since:

March 2012

Authors:

Jiu Zhou Zhao, Qing Liang Wang

Keywords:

Aging, Fe-Cu Alloy, Microstructure Evolution, Modeling

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