A Brief Review of κ-Carbide in Fe-Mn-Al-C Model Alloys
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
The multiple length scale analysis of previously designed Fe-Mn-Al-C based low-density model alloys reveals the difference in ordered κ-carbide, (Fe,Mn)3AlCx, between Fe-25Mn-16Al-5.2C (at%) alloy and Fe-3Mn-10Al-1.2C (at%) alloy. For the former alloy composition consisting of fully austenite grains, κ-carbide showed majorly cuboidal and minorly pancake morphology and its chemical composition was not changed through aging for 24 h and 168 h at 600˚C. Meanwhile, for the isothermally annealed ferritic alloy system for 1 hr at 500 and 600˚C, the dramatic change in the chemical composition of needle-shape κ-carbide, (Fe,Mn)3(Fe,Al)Cx, was found. Here we address that the compositional ᴀuctuations in the vicinity of the carbides are significantly controlled by abutting phase, either austenite or ferrite. Namely, the cooperative ordering of carbon and Al is an important factor contributing to carbide formation in the high-Mn and high-Al alloyed austenitic steel, while the carbon and Mn for the low-Mn and high Al alloyed ferritic steel.
Abstract
The multiple length scale analysis of previously designed Fe-Mn-Al-C based low-density model alloys reveals the difference in ordered κ-carbide, (Fe,Mn)3AlCx, between Fe-25Mn-16Al-5.2C (at%) alloy and Fe-3Mn-10Al-1.2C (at%) alloy. For the former alloy composition consisting of fully austenite grains, κ-carbide showed majorly cuboidal and minorly pancake morphology and its chemical composition was not changed through aging for 24 h and 168 h at 600˚C. Meanwhile, for the isothermally annealed ferritic alloy system for 1 hr at 500 and 600˚C, the dramatic change in the chemical composition of needle-shape κ-carbide, (Fe,Mn)3(Fe,Al)Cx, was found. Here we address that the compositional ᴀuctuations in the vicinity of the carbides are significantly controlled by abutting phase, either austenite or ferrite. Namely, the cooperative ordering of carbon and Al is an important factor contributing to carbide formation in the high-Mn and high-Al alloyed austenitic steel, while the carbon and Mn for the low-Mn and high Al alloyed ferritic steel.
참고문헌 (13)
- Bang C W, "Atomically resolved cementite dissolution governed by the strain state in pearlite steel wires", Scripta Mater, 108, pp.151~155 (2015)
- Chao C Y, "GRAIN-BOUNDARY PRECIPITATION IN AN FE-7.8 AL-31.7 MN-0.54 C ALLOY", Scripta Metall. Mater, 28, pp.109~114 (1993)
- Choi K, "Effect of aging on the microstructure and deformation behavior of austenite base lightweight Fe–28Mn–9Al–0.8C steel", Scripta Mater, 63, pp.1028~1031 (2010)
- Connétable D, "First principle calculations of the κ-Fe3AlC perovskite and iron–aluminium intermetallics", Intermetallics, 16, pp.345~352 (2008)
- Gutierrez-Urrutia I, "Multistage strain hardening through dislocation substructure and twinning in a high strength and ductile weight-reduced Fe–Mn–Al–C steel", Acta Mater, 60, pp.5791~5802 (2012)
- Gutierrez-Urrutia I, "Influence of Al content and precipitation state on the mechanical behavior of austenitic high-Mn low-density steels", Scripta Mater, 68, pp.343~347 (2013)
- 노지영, "Density Functional Theory Calculations on κ-carbides, (Fe,Mn)₃AlC", Journal of the Korean Physical Society, 58(2), pp.285~290 (2011), 한국물리학회
- Raabe D, "Alloy Design, Combinatorial Synthesis, and Microstructure–Property Relations for Low-Density Fe-Mn-Al-C Austenitic Steels", JOM, 66, pp.1845~1856 (2014)
- Seol J B, "Influence of carbon content on the microstructure, martensitic transformation and mechanical properties in austenite", ε-martensite dual-phase Fe–Mn–C steels, 2013, pp.61, 558~578
- Seol J B, "Atomic scale effects of alloying, partitioning, solute drag and austempering on the mechanical properties of high-carbon bainitic–austenitic TRIP steels", Acta Mater, 60, pp.6183~6199 (2012)
- Seol J B, "Direct evidence for the formation of ordered carbides in a ferrite-based low-density Fe–Mn–Al–C alloy studied by transmission electron microscopy and atom probe tomography", Scripta Mater, 68, pp.348~353 (2013)
- Springer H, "Rapid alloy prototyping: Compositional and thermo-mechanical high throughput bulk combinatorial design of structural materials based on the example of 30Mn–1.2C–xAl triplex steels", Acta Mater, 60, pp.4950~4959 (2012)
- Yao M J, "Combined atom probe tomography and density functional theory investigation of the Al offstoichiometry of κ-carbides in an austenitic Fe–Mn–Al–C low density steel", Acta Mater, 106, pp.229~238 (2016)