Crystallographic texture and microstructure of pulsed diode laser-deposited Waspaloy

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

DOI: https://doi.org/10.1016/j.actamat.2008.11.004

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 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.

Viewing alternatives

Metrics

Item Actions

Export

You can export this page using these formats Digital Object Identifier - DOI

About

• Item ORO ID
• 29555
• Item Type
• Journal Item
• ISSN
• 1359-6454
• Keywords
• laser direct metal deposition (LDMD); nickel alloys; texture; near-net shape manufacture; electron backscatter diffraction
• Academic Unit or School
• Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
  Faculty of Science, Technology, Engineering and Mathematics (STEM)
• Copyright Holders
• © 2008 Acta Materialia Inc.
• Depositing User
• Richard Moat