Determination of crystallite size, strain and solubility in mechanically alloyed W-xTi (x=0.5, 1.0, 4.0 and 10.0 wt%) powder alloys

Hadi Jahangiri; M. Lütfi Öveçoǧlu

doi:10.1016/j.matlet.2016.04.158

Determination of crystallite size, strain and solubility in mechanically alloyed W-xTi (x=0.5, 1.0, 4.0 and 10.0 wt%) powder alloys

Hadi Jahangiri, M. Lütfi Öveçoǧlu^*

^*Corresponding author for this work

Department of Metallurgical and Materials Engineering

Istanbul Technical University

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

Effects of mechanical alloying (MA) and titanium (Ti) content on the effective lattice parameter, crystallite size and lattice strain of the W-xTi (x=0.5, 1.0, 4.0 and 10.0 wt% Ti) alloys were investigated. Using TOPAS 5 (Bruker AXS) software and Vegard's law, effective lattice parameters, a_eff were determined from the X-ray diffraction (XRD) peak shift values at different MA durations and Ti contents. Lattice strain and crystallite sizes at varying MA durations and Ti contents were calculated by the Williamson-Hall method and Lorentzian rule using the TOPAS 5 (Bruker AXS) software. As expected, with increasing MA durations and Ti contents, effective lattice parameter and strain values increased and crystallite sizes decreased. Deviations of measured effective lattice parameter values from Vegard's law were analyzed. Negative deviations from the Vegard's law exist for the W-xTi (x=0.5, 1.0, 4.0 and 10.0 wt% Ti) alloys MA'd for 10 h and a maximum solubility of 11 at% Ti was estimated for the W-10 wt%Ti alloy MA'd for 10 h. The smallest crystallite size of 2.21 nm and the maximum strain of 4.57% were calculated for the W-4 wt%Ti alloy MA'd for 20 h.

Original language	English
Pages (from-to)	193-196
Number of pages	4
Journal	Materials Letters
Volume	178
DOIs	https://doi.org/10.1016/j.matlet.2016.04.158
Publication status	Published - 1 Sept 2016

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.

Funding

The authors would like to thank the Scientific and Technological Research Council of Turkey (TUBITAK) for funding this research with project number 114M433 and the Scientific Research Projects Coordination Unit (BAP) of Istanbul Technical University for partial funding of this investigation with the project number 38885 .

Funders	Funder number
TUBITAK	114M433
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu
Istanbul Teknik Üniversitesi	38885

Keywords

Crystallite size
Effective lattice parameter
Mechanical alloying
Vegard's law
W-Ti
Williamson-Hall method

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10.1016/j.matlet.2016.04.158

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title = "Determination of crystallite size, strain and solubility in mechanically alloyed W-xTi (x=0.5, 1.0, 4.0 and 10.0 wt%) powder alloys",

abstract = "Effects of mechanical alloying (MA) and titanium (Ti) content on the effective lattice parameter, crystallite size and lattice strain of the W-xTi (x=0.5, 1.0, 4.0 and 10.0 wt% Ti) alloys were investigated. Using TOPAS 5 (Bruker AXS) software and Vegard's law, effective lattice parameters, aeff were determined from the X-ray diffraction (XRD) peak shift values at different MA durations and Ti contents. Lattice strain and crystallite sizes at varying MA durations and Ti contents were calculated by the Williamson-Hall method and Lorentzian rule using the TOPAS 5 (Bruker AXS) software. As expected, with increasing MA durations and Ti contents, effective lattice parameter and strain values increased and crystallite sizes decreased. Deviations of measured effective lattice parameter values from Vegard's law were analyzed. Negative deviations from the Vegard's law exist for the W-xTi (x=0.5, 1.0, 4.0 and 10.0 wt% Ti) alloys MA'd for 10 h and a maximum solubility of 11 at% Ti was estimated for the W-10 wt%Ti alloy MA'd for 10 h. The smallest crystallite size of 2.21 nm and the maximum strain of 4.57% were calculated for the W-4 wt%Ti alloy MA'd for 20 h.",

keywords = "Crystallite size, Effective lattice parameter, Mechanical alloying, Vegard's law, W-Ti, Williamson-Hall method",

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T1 - Determination of crystallite size, strain and solubility in mechanically alloyed W-xTi (x=0.5, 1.0, 4.0 and 10.0 wt%) powder alloys

AU - Jahangiri, Hadi

AU - Öveçoǧlu, M. Lütfi

PY - 2016/9/1

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N2 - Effects of mechanical alloying (MA) and titanium (Ti) content on the effective lattice parameter, crystallite size and lattice strain of the W-xTi (x=0.5, 1.0, 4.0 and 10.0 wt% Ti) alloys were investigated. Using TOPAS 5 (Bruker AXS) software and Vegard's law, effective lattice parameters, aeff were determined from the X-ray diffraction (XRD) peak shift values at different MA durations and Ti contents. Lattice strain and crystallite sizes at varying MA durations and Ti contents were calculated by the Williamson-Hall method and Lorentzian rule using the TOPAS 5 (Bruker AXS) software. As expected, with increasing MA durations and Ti contents, effective lattice parameter and strain values increased and crystallite sizes decreased. Deviations of measured effective lattice parameter values from Vegard's law were analyzed. Negative deviations from the Vegard's law exist for the W-xTi (x=0.5, 1.0, 4.0 and 10.0 wt% Ti) alloys MA'd for 10 h and a maximum solubility of 11 at% Ti was estimated for the W-10 wt%Ti alloy MA'd for 10 h. The smallest crystallite size of 2.21 nm and the maximum strain of 4.57% were calculated for the W-4 wt%Ti alloy MA'd for 20 h.

AB - Effects of mechanical alloying (MA) and titanium (Ti) content on the effective lattice parameter, crystallite size and lattice strain of the W-xTi (x=0.5, 1.0, 4.0 and 10.0 wt% Ti) alloys were investigated. Using TOPAS 5 (Bruker AXS) software and Vegard's law, effective lattice parameters, aeff were determined from the X-ray diffraction (XRD) peak shift values at different MA durations and Ti contents. Lattice strain and crystallite sizes at varying MA durations and Ti contents were calculated by the Williamson-Hall method and Lorentzian rule using the TOPAS 5 (Bruker AXS) software. As expected, with increasing MA durations and Ti contents, effective lattice parameter and strain values increased and crystallite sizes decreased. Deviations of measured effective lattice parameter values from Vegard's law were analyzed. Negative deviations from the Vegard's law exist for the W-xTi (x=0.5, 1.0, 4.0 and 10.0 wt% Ti) alloys MA'd for 10 h and a maximum solubility of 11 at% Ti was estimated for the W-10 wt%Ti alloy MA'd for 10 h. The smallest crystallite size of 2.21 nm and the maximum strain of 4.57% were calculated for the W-4 wt%Ti alloy MA'd for 20 h.

KW - Crystallite size

KW - Effective lattice parameter

KW - Mechanical alloying

KW - Vegard's law

KW - W-Ti

KW - Williamson-Hall method

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Determination of crystallite size, strain and solubility in mechanically alloyed W-xTi (x=0.5, 1.0, 4.0 and 10.0 wt%) powder alloys

Abstract

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Keywords

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