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Partitioning of the High Strength Steel Contained Ti Microalloy Element at the Temperatures Above and Below Martensitic Transformation Start Temperature (Ms)

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Abstract

In this study, a high strength steel is partitioned at two temperatures (below and over Ms). Structure and main mechanical properties of the samples were studied by scanning electron microscopy, X-ray diffraction, tensile test, microhardness test and pin-on-disk test. The results confirmed that carbon content in austenite phase (Cγ) and R.A (Retained Austenite) volume fraction (Vγ) increased by increasing the partitioning temperature (PT) from a PT < Ms to a PT > Ms. Vγ and Cγ in R.A for the sample partitioned at 400 °C was as recorded 22.51% and 0.435 wt.%, respectively. Ultimate strength, fracture strain, hardness and friction coefficient of this sample were recorded as 1102 MPa, 22.5%, 290 HB and 0.38, respectively. Partitioning temperature above Ms was recognized to be more efficient because of the better mechanical properties of the sample comparing with PT below Ms.

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Notes

  1. Quenching temperature.

  2. Martensitic transformation finish temperature.

  3. Partitioning temperature.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran

    Ali Almasi, Abbas Kianvash & Abolfazl Tutunchi

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  1. Ali Almasi
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  2. Abbas Kianvash
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  3. Abolfazl Tutunchi
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Correspondence to Abbas Kianvash.

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Almasi, A., Kianvash, A. & Tutunchi, A. Partitioning of the High Strength Steel Contained Ti Microalloy Element at the Temperatures Above and Below Martensitic Transformation Start Temperature (Ms). Metallogr. Microstruct. Anal. 10, 534–540 (2021). https://doi.org/10.1007/s13632-021-00768-0

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  • DOI: https://doi.org/10.1007/s13632-021-00768-0

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