pp. 515-523
S&M1514 Research Paper of Special Issue https://doi.org/10.18494/SAM.2018.1759 Published: February 28, 2018 Effects of Aging Treatment on Microstructure of High-Al-content Fe-15Mn-10Al-1.0C Alloy [PDF] Wei-Chih Chen, Chung-Chun Wu, and Wei-Yang Chang (Received July 29, 2017; Accepted November 2, 2017) Keywords: Fe-Mn-Al-C alloy, B2 and D03 ordered phases, spinodal decomposition
The purpose of this study is to examine the effects of aging treatment on the microstructures of the dual-phase Fe-15Mn-10Al-1.0C alloy by optical microscopy (OM) and transmission electron microscopy (TEM). On the basis of the results of our experiments, we reached the following conclusions. Under the as-quenched condition, the microstructure of the Fe-15Mn-10Al-1.0C alloy was a mixture of ferrite and austenite phases. TEM examination revealed that (Fe,Mn)3AlCX carbides precipitated within the austenite matrix, and (B2 + D03) ordered phases could be found within the ferrite region owing to the mechanism of the α → α + B2 → α + D03 ordering transition. This result indicated that an increase in the amount of Al added to the Fe-Mn-Al-C alloy would enhance both the formation of ordered phases within the ferrite matrix and the precipitation of κ-carbides within the austenite matrix. When the alloy was aged at 650 ℃ for 24 h, phase decomposition of γ → κ′ + B2 was observed on the austenite grain boundary.
Corresponding author: Wei-Chih ChenCite this article Wei-Chih Chen, Chung-Chun Wu, and Wei-Yang Chang, Effects of Aging Treatment on Microstructure of High-Al-content Fe-15Mn-10Al-1.0C Alloy, Sens. Mater., Vol. 30, No. 3, 2018, p. 515-523. |