DRAWING CCCT DIAGRAMS AND INVESTIGATION OF DEFORMATION EFFECTS ON MARTENSITE AND BAINITE TRABSFORMATIONS IN NICRMOV STEEL

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TAHERIAN R.; NAJAFIZADEH A.; SHAMANIAN M.; SHATERI R.

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Journal: ESTEGHLAL Year:2006 | Volume:25 | Issue:1 Page(s): 149-165

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Title

DRAWING CCCT DIAGRAMS AND INVESTIGATION OF DEFORMATION EFFECTS ON MARTENSITE AND BAINITE TRABSFORMATIONS IN NICRMOV STEEL

Author(s)

TAHERIAN R. | NAJAFIZADEH A. | SHAMANIAN M. | SHATERI R. | Issue Writer Certificate

Keywords

CCCTQ3

CCTQ3

HOT DEFORMATIONQ3

MARTENSITEQ3

BAINITEQ3

Abstract

In this study, two CCCT diagrams are drawn to be compared with a CCT diagram. The CCCT diagrams represent continuous cooling transformations in stress assisted state. The increased Md and Bd temperatures of CCCT diagrams were also compared with those of the CCT diagrams and the cause was investigated from both thermodynamic and metallurgical viewpoints. Thermodynamic examinations revealed that stress causes the mechanical driving force to increase but the total free energy of transformation to decrease; hence, Md and Bd will rise. Metallurgical investigations showed that if deformation temperatures are selected in a manner to increase the structural strength of the original austenite grains prior to deformation, the shear force required for MARTENSITE and BAINITE transformations will arduously obtain; hence, Md and Bd will fall. However, if recrystallization or full recovery occurs during or after deformation, interior grain structure softens and the shear force required for MARTENSITE and BAINITE transformations will readily obtain; hence, Md and Bd will rise. It was also found that the nose in CCCT curves are shifted to the left as compared to that of CCT curves. This indicates that deformation of steel enhances BAINITE formation more readily than that of the MARTENSITE phase.

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APA: Copy

TAHERIAN, R., NAJAFIZADEH, A., SHAMANIAN, M., & SHATERI, R.. (2006). DRAWING CCCT DIAGRAMS AND INVESTIGATION OF DEFORMATION EFFECTS ON MARTENSITE AND BAINITE TRABSFORMATIONS IN NICRMOV STEEL. ESTEGHLAL, 25(1), 149-165. SID. https://sid.ir/paper/5909/en

Vancouver: Copy

TAHERIAN R., NAJAFIZADEH A., SHAMANIAN M., SHATERI R.. DRAWING CCCT DIAGRAMS AND INVESTIGATION OF DEFORMATION EFFECTS ON MARTENSITE AND BAINITE TRABSFORMATIONS IN NICRMOV STEEL. ESTEGHLAL[Internet]. 2006;25(1):149-165. Available from: https://sid.ir/paper/5909/en

IEEE: Copy

R. TAHERIAN, A. NAJAFIZADEH, M. SHAMANIAN, and R. SHATERI, “DRAWING CCCT DIAGRAMS AND INVESTIGATION OF DEFORMATION EFFECTS ON MARTENSITE AND BAINITE TRABSFORMATIONS IN NICRMOV STEEL,” ESTEGHLAL, vol. 25, no. 1, pp. 149–165, 2006, [Online]. Available: https://sid.ir/paper/5909/en

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