INVESTIGATION OF CONTINUOUS COOLING TRANSFORMATIONS AND MICROSTRUCTURES IN A LOW CARBON TI-NB BEARING MICROALLYED STEEL BY MEANS OF DILATOMETRY AND METALLOGRAPHY

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MOOSAVI A.S.; GHASEMI S.S.; KALANTAR M.

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Journal: Journal of Metallurgical and Materials Engineering Year:2016 | Volume:28 | Issue:1 Page(s): 99-107

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Title

INVESTIGATION OF CONTINUOUS COOLING TRANSFORMATIONS AND MICROSTRUCTURES IN A LOW CARBON TI-NB BEARING MICROALLYED STEEL BY MEANS OF DILATOMETRY AND METALLOGRAPHY

Author(s)

MOOSAVI A.S. | GHASEMI S.S. | KALANTAR M. | Issue Writer Certificate

Keywords

LOW CARBON LOW ALLOY STEELQ2

CONTINUOUS COOLINGQ2

DILATOMETRYQ2

METALLOGRAPHYQ2

FERRITEQ2

BAINITEQ2

MARTENSITEQ2

Abstract

In this investigation, CONTINUOUS COOLING transformations and microstructures have been studied in detail in a low carbon Ti-Nb bearing microalloyed steel by means of DILATOMETRY, METALLOGRAPHY and hardness measurements. The results indicate that when the cooling rate is greater than 1°C/s, the dilatation curve is associated with a major dilatation at relatively low transformation temperatures, which is consistent with the martensitic phase transformation. For a cooling rate between 0.2-0.8°C/s, the dilatation curve is also characterized with a uniform single transformation over the martensitic and bainitic phase transformation temperature range. However, as the cooling rate is reduced to less than 0.2°C/s, the dilation curve is characterized with a quite variable double stage transformation which is associated with the FERRITE and BAINITE transformation products. These results suggest that the bainitic and martensitic phase transformations are developed with a similar displacive mechanism, while FERRITE is formed by a diffusional mechanism.

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APA: Copy

MOOSAVI, A.S.. (2016). INVESTIGATION OF CONTINUOUS COOLING TRANSFORMATIONS AND MICROSTRUCTURES IN A LOW CARBON TI-NB BEARING MICROALLYED STEEL BY MEANS OF DILATOMETRY AND METALLOGRAPHY. JOURNAL OF METALLURGICAL AND MATERIALS ENGINEERING (JOURNAL OF SCHOOL OF ENGINEERING), 28(1), 99-107. SID. https://sid.ir/paper/196135/en

Vancouver: Copy

MOOSAVI A.S.. INVESTIGATION OF CONTINUOUS COOLING TRANSFORMATIONS AND MICROSTRUCTURES IN A LOW CARBON TI-NB BEARING MICROALLYED STEEL BY MEANS OF DILATOMETRY AND METALLOGRAPHY. JOURNAL OF METALLURGICAL AND MATERIALS ENGINEERING (JOURNAL OF SCHOOL OF ENGINEERING)[Internet]. 2016;28(1):99-107. Available from: https://sid.ir/paper/196135/en

IEEE: Copy

A.S. MOOSAVI, “INVESTIGATION OF CONTINUOUS COOLING TRANSFORMATIONS AND MICROSTRUCTURES IN A LOW CARBON TI-NB BEARING MICROALLYED STEEL BY MEANS OF DILATOMETRY AND METALLOGRAPHY,” JOURNAL OF METALLURGICAL AND MATERIALS ENGINEERING (JOURNAL OF SCHOOL OF ENGINEERING), vol. 28, no. 1, pp. 99–107, 2016, [Online]. Available: https://sid.ir/paper/196135/en

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