Crystallographic texture and microstructure of pulsed diode laser-deposited Waspaloy

R. J. Moat; A. J. Pinkerton; L. Li; P. J. Withers; M. Preuss

doi:10.1016/j.actamat.2008.11.004

Crystallographic texture and microstructure of pulsed diode laser-deposited Waspaloy

R. J. Moat, A. J. Pinkerton, L. Li, P. J. Withers, M. Preuss

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

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. © 2008 Acta Materialia Inc.

Original language	English
Pages (from-to)	1220-1229
Number of pages	9
Journal	Acta Materialia
Volume	57
Issue number	4
DOIs	https://doi.org/10.1016/j.actamat.2008.11.004
Publication status	Published - Feb 2009

Keywords

Electron backscatter diffraction
Laser direct metal deposition (LDMD)
Near-net shape manufacture
Nickel alloys
Texture

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10.1016/j.actamat.2008.11.004

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title = "Crystallographic texture and microstructure of pulsed diode laser-deposited Waspaloy",

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. {\textcopyright} 2008 Acta Materialia Inc.",

keywords = "Electron backscatter diffraction, Laser direct metal deposition (LDMD), Near-net shape manufacture, Nickel alloys, Texture",

author = "Moat, \{R. J.\} and Pinkerton, \{A. J.\} and L. Li and Withers, \{P. J.\} and M. Preuss",

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TY - JOUR

T1 - Crystallographic texture and microstructure of pulsed diode laser-deposited Waspaloy

AU - Moat, R. J.

AU - Pinkerton, A. J.

AU - Li, L.

AU - Withers, P. J.

AU - Preuss, M.

N1 - Times Cited: 0

PY - 2009/2

Y1 - 2009/2

N2 - 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. © 2008 Acta Materialia Inc.

AB - 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. © 2008 Acta Materialia Inc.

KW - Electron backscatter diffraction

KW - Laser direct metal deposition (LDMD)

KW - Near-net shape manufacture

KW - Nickel alloys

KW - Texture

U2 - 10.1016/j.actamat.2008.11.004

DO - 10.1016/j.actamat.2008.11.004

M3 - Article

SN - 1873-2453

VL - 57

SP - 1220

EP - 1229

JO - Acta Materialia

JF - Acta Materialia

IS - 4

ER -

Crystallographic texture and microstructure of pulsed diode laser-deposited Waspaloy

Abstract

Keywords

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