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Competing Martensitic, Bainitic, and Pearlitic Transformations in a Hypoeutectoid Ti-5Cu Alloy

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Abstract

This article discusses the competing mechanisms of martensite formation vs eutectoid decomposition via pearlitic or bainitic mechanisms during continuous cooling of a Ti-5 wt pct Cu hypoeutectoid alloy, which falls under the category of active eutectoid systems. Faster cooling rates result in a mixed microstructure of nanoscale bainite consisting of a far-from-equilibrium Ti2Cu phase and martensitic alpha plates, as determined from three-dimensional atom probe (3DAP) coupled with energy-filtered transmission electron microscopy (EFTEM). Slower cooling resulted in near-equilibrium eutectoid-based microstructures.

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Notes

  1. GATAN 656 DIMPLE GRINDER and GATAN PIPS* are trademarks of Gatan, Inc., Pleasanton, CA.

  2. LEAP is a trademark of Cameca Intruments, Madison, WI.

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This work was supported, in part, by the National Science Foundation, Division of Materials Research, under Award No. 6701956. The authors also gratefully acknowledge the use of experimental facilities at the Center for Advanced Research and Technology (CART) at the University of North Texas.

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Authors and Affiliations

  1. Center for Advanced Research and Technology and Department of Materials Science and Engineering, University of North Texas, Denton, TX 76203-5017, USA

    A. Devaraj (Graduate Research Assistant), S. Nag (Research Assistant Professor) & R. Banerjee (Associate Professor)

  2. ARC Centre of Excellence for Design of Light Metals, Monash University, Clayton, Victoria, 3800, Australia

    B. C. Muddle (Professor)

Authors
  1. A. Devaraj
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  2. S. Nag
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  3. B. C. Muddle
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  4. R. Banerjee
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Correspondence to R. Banerjee.

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Manuscript submitted September 13, 2010.

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Devaraj, A., Nag, S., Muddle, B.C. et al. Competing Martensitic, Bainitic, and Pearlitic Transformations in a Hypoeutectoid Ti-5Cu Alloy. Metall Mater Trans A 42, 1139–1143 (2011). https://doi.org/10.1007/s11661-011-0656-5

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