In the present study, we investigated the austenite stability of a sintered Fe-based nanocrystalline alloy. The volume fraction of austenite was measured based on the X-ray diffraction data of sintered Fe-based nanocrystalline alloys, which were prepared by high-energy ball milling and spark plasma sintering. The sintered alloy samples showed a higher volume fraction of austenite at room temperature as compared to the equilibrium volume fraction of austenite obtained using thermodynamic calculations, which resulted from the nanosized crystalline structure of the sintered alloy. It was proved that the austenite stability of the sintered Fe-based alloy increased with a rise in the amount of austenite stabilizing elements such as Mn, Ni, and C; however, it increased more effectively with a decrease in the actual grain size. Furthermore, we proposed a new equation to predict the martensite starting temperature for sintered Fe-based alloys.

Abstract
1. 서 론
2. 실험 방법
3. 결과 및 고찰
4. 결 론
References

• 최승규(전북대학교 신소재공학부) | Seunggyu Choi (Division of Advanced Materials Engineering, Research Center for Advanced Materials Development, Jeonbuk National University)
• 서남혁(전북대학교 신소재공학부) | Namhyuk Seo (Division of Advanced Materials Engineering, Research Center for Advanced Materials Development, Jeonbuk National University)
• 전준협(전북대학교 신소재공학부) | Junhyub Jun (Division of Advanced Materials Engineering, Research Center for Advanced Materials Development, Jeonbuk National University)
• 손승배(전북대학교 신소재공학부) | Seung Bae Son (Division of Advanced Materials Engineering, Research Center for Advanced Materials Development, Jeonbuk National University)
• 이석재(전북대학교 신소재공학부) | Seok-Jae Lee (Division of Advanced Materials Engineering, Research Center for Advanced Materials Development, Jeonbuk National University) Corresponding Author