Preprint Article Version 1 This version is not peer-reviewed

Analytical Modeling of Three-Dimensional Temperature Distribution of Selective Laser Melting of Ti-6Al-4V

Version 1 : Received: 4 September 2018 / Approved: 5 September 2018 / Online: 5 September 2018 (15:14:56 CEST)

How to cite: Ning, J.; Liang, S.Y. Analytical Modeling of Three-Dimensional Temperature Distribution of Selective Laser Melting of Ti-6Al-4V. Preprints 2018, 2018090101 (doi: 10.20944/preprints201809.0101.v1). Ning, J.; Liang, S.Y. Analytical Modeling of Three-Dimensional Temperature Distribution of Selective Laser Melting of Ti-6Al-4V. Preprints 2018, 2018090101 (doi: 10.20944/preprints201809.0101.v1).

Abstract

Selective laser melting (SLM) is one of the widely used techniques in metallic additive manufacturing, in which high-density laser powder is utilized to selectively melting layers of powders to create geometrically complex parts. Temperature distribution and molten pool geometry directly determine the balling effect, and concentrated balling phenomenon significantly deteriorates surface integrity and mechanical properties of the part. Finite element models have been developed to predict temperature distribution and molten pool geometry, but they were computationally expensive. In this paper, the three-dimensional temperature distributions are predicted by analytical models using point moving heat source and semi-ellipsoidal moving source respectively. The molten pool dimensions under various process conditions are obtained from the three-dimensional temperature predictions and experimentally validated. Ti-6Al-4V alloy is chosen for the investigation. Good agreements between the predictions and the measurements are observed. The presented models are also suitable for other metallic materials in the SLM process.

Subject Areas

Metallic Additive Manufacturing, Selective Laser Melting, Analytical Modeling, 3D Temperature Prediction, Molten Pool Dimension

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