This guest contribution on the Altair Blog is written by the Additive Works Team. Additive Works is a member of the Altair Partner Alliance.
More lasers. More power. Higher build rates and lower costs per part. This is the main expectation for the new generation of laser beam melting machines with more than two lasers or even kilowatt lasers. But what’s happening if you increase the energy per time transferred to the process by magnitudes? Basically, you can expect macroscopic overheating of parts during the process, leading to unwanted additional shrinkage, graded microstructure or phases and varying mechanical material properties. Although the part seems to be okay after the process, this can still lead to further issues in post-processing like cracking during heat-treatment or application. Depending on the material and the maximum temperature reached, you may see that overheating has taken place. But is this sufficient for industrial production?