…Laser heat input increases as speed reduces, and the values of the temperature signals from the laser heated zone increase up to values of interest for laser assisted cold spray. (W 10) (1)

Heat input = Entrada de calor

Welds were made with low and high currents with constant travel speeds so as to vary the energy input. No preheating was used in this case. Visual and magnetic particle inspection 48 hours after welding did not reveal any cracking in either weld or parent metal. (Welding 141) (2)

Energy input = Entrada de energia

It was reasoned that large oscillation amplitudes expose a considerable amount of material to the surrounding atmosphere, resulting in increased convective heat dissipation. Therefore, an increase in power input would not create the expected temperature increase. (W 75) (3)

Power input = Entrada de alimentação

(1) A Novel Coaxially Laser-Assisted (COLA) Cold Spray System

Allen C M, Marrocco T, McNutt P 

TWI Ltd., Great Abington, Cambridge, CB21 6AL, United Kingdom. 

Koivuluoto H, Latokartano J, Vuoristo P 

Tampere University of Technology, Korkeakoulunkatu 6, FI-33720 Tampere, Finland.

Olsson R 

Luleå University of Technology, SE-971 87 Luleå, Sweden.

Paper presented at ITSC 2015, 11-14 May 2015. Long Beach, CA, USA.

(2) Cracking of hardfacing alloy

Case Study

www.twi-global.com/news-events/case-studies/cracking-of-hardfacing-alloy-133/ – 2013-12-19.

(3) Solid state joining of metals by linear friction welding: A literature review

Imran Bhamji1,*, Michael Preuss1, Philip L. Threadgill2, Adrian C. Addison3 

1Manchester Materials Science Centre, University of Manchester, Grosvenor Street, M1 7HS.

2Formerly with TWI Ltd, Cambridge, CB21 6AL, now retired

3TWI Ltd, Cambridge, CB21 6AL

*Corresponding author. Email: Imran.bhamji@postgrad.manchester.ac.uk

Paper published in Materials Science & Technology 2010. Vol.27. No.1. Jan 2011. pp.2-12.