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Crystallographic texture and microstructure of pulsed diode laser-deposited Waspaloy

Moat, R. J. and Pinkerton, A. J. and Li, L. and Withers, P. J. and Preuss, M. (2009) Crystallographic texture and microstructure of pulsed diode laser-deposited Waspaloy. Acta Metallurgica et Materialia, 57 (4). pp. 1220-1229. ISSN 1359-6454

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Abstract

The role of both laser Pulse length and duty cycle in controlling the grain size and crystallographic texture of diode laser-deposited Waspaloy powder is investigated. Thin-walled test structures of Waspaloy have been produced Using a range of pulse parameters and analyzed by means of scanning electron microscopy and electron backscatter diffraction. Results have been correlated with a simple analytical model of the effect of the laser pulse oil the substrate temperature and melt-pool geometry in order to help explain the trends observed. Findings show that Pulse parameters have a marked effect oil the resulting grain morphology and crystallographic orientation. Modelling has indicated that this arises because the microstructure Lire is highly dependent oil the melt-pool geometry, particularly the inclination angle of the melt-pool boundary.

Item Type: Article
Journal or Publication Title: Acta Metallurgica et Materialia
Uncontrolled Keywords: Laser direct metal deposition (LDMD) ; Nickel alloys ; Texture ; Near-net shape manufacture ; Electron backscatter diffraction
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: Faculty of Science and Technology > Engineering
ID Code: 59514
Deposited By: ep_importer_pure
Deposited On: 26 Oct 2012 16:06
Refereed?: Yes
Published?: Published
Last Modified: 24 Jan 2014 05:34
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/59514

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