Melt pool modelling, simulation and experimental validation for SLM

Wessel Wits

Research output: Contribution to conferencePaperAcademic

Abstract

SLM parts are built by successively melting layers of powder in a powder bed. Process parameters are often optimized experimentally by laser scanning a number of single tracks and subsequently determining which settings lead to a good compromise between quality and build speed. However, experimentation only does not yield the necessary insights into the physical processes behind the results. Therefore, the laser interaction with the powder bed must be modelled to describe the melt pool behaviour that occurs during the laser melting process. Energy absorption and heat conduction are modelled to determine the temperature distribution and characteristics of the melt pool for various process parameters such as laser power, scan speed, powder layer thickness, etc. The numerical model and simulations have been validated using measurement data obtained from SLM experiments using titanium alloy Ti6Al4V. Melt pool modelling can be used to predict SLM process parameters ranges for which single tracks are of good quality. Moreover, the simulated temperature distribution can also serve as input for methods predicting part deformation due to residual stresses.
Original languageEnglish
Publication statusPublished - 2017
EventThe Enlighten Conference - Metal Powder-based Additive Manufacturing 2017 - Ricoh Arena, Coventry, United Kingdom
Duration: 11 Oct 201712 Oct 2017
https://www.photonex.org/conference/index.html

Conference

ConferenceThe Enlighten Conference - Metal Powder-based Additive Manufacturing 2017
CountryUnited Kingdom
CityCoventry
Period11/10/1712/10/17
Internet address

Fingerprint

Powders
Lasers
Computer simulation
Melting
Temperature distribution
Energy absorption
Titanium alloys
Heat conduction
Numerical models
Residual stresses
Scanning
Experiments

Cite this

Wits, W. (2017). Melt pool modelling, simulation and experimental validation for SLM. Paper presented at The Enlighten Conference - Metal Powder-based Additive Manufacturing 2017, Coventry, United Kingdom.
Wits, Wessel. / Melt pool modelling, simulation and experimental validation for SLM. Paper presented at The Enlighten Conference - Metal Powder-based Additive Manufacturing 2017, Coventry, United Kingdom.
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language = "English",
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Wits, W 2017, 'Melt pool modelling, simulation and experimental validation for SLM' Paper presented at The Enlighten Conference - Metal Powder-based Additive Manufacturing 2017, Coventry, United Kingdom, 11/10/17 - 12/10/17, .

Melt pool modelling, simulation and experimental validation for SLM. / Wits, Wessel.

2017. Paper presented at The Enlighten Conference - Metal Powder-based Additive Manufacturing 2017, Coventry, United Kingdom.

Research output: Contribution to conferencePaperAcademic

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PY - 2017

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Wits W. Melt pool modelling, simulation and experimental validation for SLM. 2017. Paper presented at The Enlighten Conference - Metal Powder-based Additive Manufacturing 2017, Coventry, United Kingdom.