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 0956-7151
Full text not available from this repository.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.