Deakin University
Browse

File(s) under permanent embargo

Heat accumulation in laser Additive Manufacturing processes and its effect on local solidification

conference contribution
posted on 2023-02-21, 22:34 authored by C Hagenlocher, P O'Toole, Wei XuWei Xu, M Brandt, M Easton, A Molotnikov
Laser based additive manufacturing creates parts layer-by-layer and offers increased design freedom in comparison to traditional manufacturing. However, the repeated application of energy frequently revisits previous deposited layers, which leads to heat accumulation and may result in microstructural inhomogeneity and anisotropic mechanical properties. Here we present a theoretical model which is applied to capture the heat evolution and accumulation during laser direct energy deposition and laser powder bed fusion processes. Infrared imaging from literature is used to validate the model. The model captures the effect of the consecutive deposition of the individual layers and shows its influence on heat accumulation. It demonstrates that heat accumulation leads to noticeable change in local solidification rate and temperature gradient, which results in significant variation in local grain structure. The predictions of the model allows for the development of process optimization strategies for the control of local microstructure evolution.

History

Volume

111

Pagination

176-179

ISSN

2212-8271

Language

en

Publication classification

E1 Full written paper - refereed

Title of proceedings

Procedia CIRP

Publisher

Elsevier BV

Usage metrics

    Research Publications

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC