Moat, R. J.; Pinkerton, A. J.; Li, L.; Withers, P. J. and Preuss, M.
|DOI (Digital Object Identifier) Link:||http://dx.doi.org/10.1016/j.actamat.2008.11.004|
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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 on the substrate temperature and melt-pool geometry in order to help explain the trends observed. Findings show that pulse parameters have a marked effect on the resulting grain morphology and crystallographic orientation. Modelling has indicated that this arises because the microstructure is highly dependent on the melt-pool geometry, particularly the inclination angle of the melt-pool boundary.
|Item Type:||Journal Article|
|Copyright Holders:||2008 Acta Materialia Inc.|
|Keywords:||laser direct metal deposition (LDMD); nickel alloys; texture; near-net shape manufacture; electron backscatter diffraction|
|Academic Unit/Department:||Mathematics, Computing and Technology > Engineering & Innovation
Mathematics, Computing and Technology
|Depositing User:||Richard Moat|
|Date Deposited:||22 Sep 2011 14:17|
|Last Modified:||18 Jan 2016 10:45|
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