Quantitative analysis of Mo solute drag effect on ferrite and bainite transformations in Fe-0.4C-0.5Mo alloy
Source abstract
Abstract
Abstract Mo addition is widely used to retard ferrite transformation and increase hardenability of steels. It has been well recognized that Mo segregation at ferrite/austenite interface induces solute drag effect (SDE) and reduces migration rate of ferrite/austenite interface while retardation by Mo is less obvious in bainite transformation. However, element segregation, solute drag effects and its interface character dependence have not been clarified quantitatively. Therefore, in the present study, amount of Mo segregation, energy dissipation during interface migration and interface orientation relationship (OR) in ferrite and bainite transformations in Fe-0.4%C-0.5%Mo (mass%) alloy have been investigated quantitatively. Mo segregation at interfaces with non K-S OR is more significant than that at interface with near K-S OR. Amount of Mo segregation at interface with non K-S OR increases with increase in transformation time investigated while energy dissipation decreases. The amount of Mo segregation and energy dissipation measured at non K-S interface coincides well with SDE model using optimized segregation energy and interface thickness. On the other hand, energy dissipation at bainite/austenite interface is large in spite of negligibly small Mo segregation, which is inconsistent with the SDE model.
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Research context
OpenAlex topics: Microstructure and Mechanical Properties of Steels · Magnetic Properties and Applications · Metallurgy and Material Forming
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (53)
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1. Partitioning of Alloying element between Austenite and proeutectoid ferrite or bainite
2. Growth kinetics of grain boundary ferrite allotoriomorphs in Fe-C-X alloys10.1007/BF02643755 ↗
3. Boswell · 1986 · 445
4. The incomplete transformation phenomenon in Fe-C-Mo alloys10.1007/BF02672561 ↗
5. An investigation of the generality of incomplete transformation to bainite in Fe-C-X alloys10.1007/BF02672563 ↗
6. Overall reaction kinetics and morphology of austenite decomposition between the upper nose and the Ms of a hypoeutectoid Fe-C-Cr alloy10.1007/BF02672562 ↗
7. Coupled-solute drag effects on ferrite formation in Fe-C-X systems10.1007/s11661-004-0294-2 ↗
8. Grain boundary migration in high-purity lead and dilute lead-tin alloys
9. The impurity-drag effect in grain boundary motion10.1016/0001-6160(62)90092-5 ↗
10. A solute drag treatment of the effects of alloying elements on the rate of the proeutectoid ferrite transformation in steels10.1016/0956-7151(95)90160-4 ↗
11. Influence of solute drag on the growth of proeutectoid ferrite in Fe-C-Mn alloy10.1016/S1359-6454(99)00232-3 ↗
12. A study of the influence of Mn and Ni on the kinetics of the proeutectoid ferrite reaction in steels10.1016/S1359-6454(00)00041-0 ↗
13. Alloying element accumulation at ferrite/austenite boundaries below the time–temperature–transformation diagram bay in an Fe–C–Mo alloy10.1016/S0921-5093(02)00375-1 ↗
14. Studies of the influence of alloying elements on the growth of ferrite from austenite under decarburization conditions: Fe-C-Ni alloys10.1007/s11661-004-0297-z ↗
15. Self-consistent model for planar ferrite growth in Fe-C-X alloys10.1007/s11661-012-1479-8 ↗
16. Quantifying the solute drag effect on ferrite growth in Fe-C-X alloys using controlled decarburization experiments10.1007/s11661-012-1547-0 ↗
17. Molybdenum accumulation at ferrite: austenite interfaces during isothermal transformation of an Fe-0.24 pct C-0.93 pct Mo alloy10.1007/s11661-004-0296-0 ↗
18. Characterization of transformation stasis in low-carbon steels microalloyed with B and MoMetall10.1007/s11661-014-2584-7 ↗
19. Investigation of solute/interphase interaction during ferrite growth10.1016/j.actamat.2016.11.035 ↗
20. Scanning transmission electron microscopy study of interfacial segregation of Mn during the formation of partitioned grain boundary ferrite in a Fe-C-Mn-Si alloy10.1007/s11661-008-9473-x ↗
21. Ferrite growth rate estimated from concentration profile measured using aberration corrected STEM-EELS
22. Effects of Mo on carbon enrichment during proeutectoid ferrite transformation in hypoeutectoid Fe-C-Mn alloys10.1007/s11661-015-2866-8 ↗
23. Carbon enrichment during ferrite transformation in Fe-Si-C alloys10.1016/j.actamat.2018.02.040 ↗
24. Carbon enrichment in austenite during bainite transformation in Fe-3Mn-C alloy10.1007/s11661-015-2744-4 ↗
25. Direct measurement of carbon enrichment in the incomplete bainite transformation in Mo added low carbon steels10.1016/j.actamat.2015.03.021 ↗
26. Lejček · 2010
27. Mapping the parent austenite orientation reconstructed from the orientation of martensite by EBSD and its application to ausformed martensite10.1016/j.actamat.2010.08.001 ↗
28. Crystallographic analysis of proeutectoid ferrite/austenite interface and interphase precipitation of vanadium carbide in medium-carbon steel10.1007/s11661-013-1702-2 ↗
29. Quantitative measurements of phase equilibria at migrating α/γ interface and dispersion of VC interphase precipitates: evaluation of driving force for interphase precipitation10.1016/j.actamat.2017.02.020 ↗
30. The isothermal decomposition of austenite in Fe-Mo-C alloys10.1007/BF03037854 ↗
31. Ferrite and carbide morphologies in and below the "bay region" of an Fe-0.19 pct C-2.30 pct Mo alloy10.1007/BF02647077 ↗
32. Effects of α/γ orientation relationshiponVCinterphase precipitation inlow-carbon steels10.1016/j.scriptamat.2013.03.020 ↗
33. Formation of grain boundary ferrite in eutectoid and hypereutectoid pearlitic steels10.1016/j.actamat.2015.10.032 ↗
34. Direct measurement of carbon enrichment during austenite to ferrite transformation in hypoeutectoid Fe–2Mn–C alloys10.1016/j.actamat.2013.02.003 ↗
35. Absolute atomic-scale measurements of the Gibbsian interfacial excess of solute at internal interfaces10.1103/PhysRevB.48.6724 ↗
36. Hillert · 1960
37. Computer simulation of the austenite/ferrite diffusional transformations in low alloyed steels10.1016/0001-6160(82)90082-7 ↗
38. Phosphorous segregation related to the grain boundary structure in an Fe-P alloy10.1016/0036-9748(81)90175-7 ↗
39. Atomic-Scale quantification of grain boundary segregation in nanocrystalline material10.1103/PhysRevLett.112.126103 ↗
40. The regular solution model for stoichiometric phases and ionic melts10.3891/acta.chem.scand.24-3618 ↗
41. A treatment of the solute drag on moving grain boundaries and phase interfaces in binary alloys10.1016/0001-6160(76)90108-5 ↗
42. Predicting the effect of Mo, Ni, and Si on the bainitic stasis10.1007/s11661-014-2262-9 ↗
43. Effect of alloying elements on the γ to α transformation in steel. I10.1016/S1359-6454(02)00143-X ↗
44. Grain boundary decohesion by sulfur segregation in ferromagnetic ironand nickel -a first-principles study-10.2320/matertrans.47.2682 ↗
45. Jin · 2014
46. Mobility of α/γ phase interfaces in Fe alloys
47. Comparison between solute drag and dissipation of Gibbs energy by diffusion10.1016/S1359-6462(01)01022-3 ↗
48. Diffusion in iron
49. Lattice diffusion in iron-A review10.2355/tetsutohagane1955.68.10_1489 ↗
50. Thermodynamics of grain boundary segregation, interfacial spinodal and their relevance for nucleation during solid-solid phase transitions10.1016/j.actamat.2019.02.005 ↗
51. Analysis of transformation stasis during the isothermal bainitic ferrite formation in Fe–C–Mn and Fe–C–Mn–Si alloys10.1016/j.actamat.2013.05.034 ↗
52. Effect of niobium on massive transformation in ultra low carbon steels: a solute drag treatment10.1016/S1359-6454(96)00036-5 ↗
53. Kaur · 1989 · vol. I