Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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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.
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 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.
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 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.
KW - Laser direct metal deposition (LDMD)
KW - Nickel alloys
KW - Texture
KW - Near-net shape manufacture
KW - Electron backscatter diffraction
U2 - 10.1016/j.actamat.2008.11.004
DO - 10.1016/j.actamat.2008.11.004
M3 - Journal article
VL - 57
SP - 1220
EP - 1229
JO - Acta Metallurgica et Materialia
JF - Acta Metallurgica et Materialia
SN - 0956-7151
IS - 4
ER -