Adaptive control is more useful in avoiding lack of fusion defects in aluminium butt joints with mismatch, but does not improve the weld root profiles achieved in those cases. (W 46) (1)

Adaptive control = Controle adaptativo

…in some cases, the plasma control obtained using a coaxial gas flow is not satisfactory as the weld penetration and quality may be adversely affected, particularly for high aspect ratio, partial penetration welds. (W 509) (2)

Plasma control = Controle de plasma

Dual and triple focus beam welding was originally intended as a porosity control mechanism, although it was found that this could also benefit plume control. (W 343) (3)

Plume control = Controle de pluma

(1) Increasing the tolerance to fit-up gap using hybrid laser-arc welding and adaptive control of welding parameters

C M Allen, P A Hilton and J Blackburn

TWI Ltd, Granta Park, Gt. Abington, Cambridge, CB21 6AL, United Kingdom

Copyright © TWI Ltd 2012

Paper presented at 37th International MATADOR Conference, Manchester, England, 25-27 July 2012.

(2) Optimisation of plasma control parameters for Nd:YAG laser welding of stainless steel enclosures

S Fisher, BNFL, Dr C A Olivier, TWI and S T Riches, TWI

Presented at 7th NOLAMP Conference (Nordic Conference in Laser Processing of Materials),

Lappeenranta, Finland, August 23-25, 1999.

(3) Dual and triple focus beam welding was originally intended as a porosity control mechanism, although it was found that this could also benefit plume control. (W 343) (3)

Laser-Vapour Interaction in High-Power cw Nd:YAG Laser Welding

J Greses, P A Hilton, TWI, Granta Park, Great Abington, Cambridge, UK; C Y Barlow, Engineering Department, University of Cambridge, Cambridge, UK; W M Steen, Material Science Department, University of Cambridge, Cambridge, UK and Laser Group, University of Liverpool, Liverpool, L69 3GH, UK

Paper 1607 presented at ICALEO 2003 Conference, 13-16 October 2003, Jacksonville, Florida, USA.