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XRD Characterization of Microstructural Evolution During Mechanical Alloying of W-20 wt%Mo

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Abstract

The present paper reports a study on the microstructural evolution during mechanical alloying of W-20wt%Mo using XRD line profile analysis. The W-20wt%Mo powder blends were ball milled using Fritsch Pulverisette P-5 high energy ball mill for varying milling time (0, 5, 10, 15, 20 h) at 300 rpm with 10:1 and 2:1 ball to powder weight ratio. The crystallite size and lattice strain were calculated using Langford method (‘average’ Williamson-Hall Plot). The precision lattice parameter calculation was done using Nelson–Riley method. The effect of milling on alloying behaviour has been investigated using change in relative integrated intensity ratios (I Mo /I W/W(Mo)) of (211) XRD peak. There was complete alloying in case of 10:1 ball to powder weight ratio, whereas half of the Mo (~10 % Mo) was alloyed with 2:1 ball to powder weight ratio. The paper also discusses the applicability of the criteria based on lattice parameter change (peak shift) for alloying behaviour during mechanical milling.

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Acknowledgments

Ajeet K. Srivastav thankfully acknowledges CSIR for a research fellowship (via award no. 09/084(0519)2010-EMR-I). Anup M. Panindre is grateful to IASc for Summer Research Fellowship during May–July 2012. Finally, the authors are thankful to S. Praveen and Niraj Chawake for the fruitful discussions.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, 600 036, India

    Ajeet K. Srivastav & B. S. Murty

  2. Department of Metallurgical and Materials Engineering, National Institute of Technology Jamshedpur, Jharkhand, 831 014, India

    Anup M. Panindre

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  1. Ajeet K. Srivastav
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  2. Anup M. Panindre
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  3. B. S. Murty
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Correspondence to Ajeet K. Srivastav.

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Srivastav, A.K., Panindre, A.M. & Murty, B.S. XRD Characterization of Microstructural Evolution During Mechanical Alloying of W-20 wt%Mo. Trans Indian Inst Met 66, 409–414 (2013). https://doi.org/10.1007/s12666-013-0269-3

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