May arise from powder surface chemistry modification and/or trapped gas in particles that are released during melting and locked in during solidification
May also be due to key-hole effect for deep melt pools.
A few months ago, we were wondering about process control in powder bed fusion of reactive powders. What are the impacts of particles’ surface contamination on the fabrication of metal components? And what are the best ways to minimise it during the complete manufacturing cycle?
Then, very few studies were trying to assess the impact of powder particles surface chemistry on the process (powder spreading, melt wettability, pores formation, etc…) and on the final product characteristics (relative density, etc).
As more data get publicly available, we can present the results of a detailed investigation aiming to 1) understand the effects of powder surface chemistry, 2) minimise particles surface contamination on the finished products and 3) improve SLM process control.
Various strategic efforts have been conducted to develop AM [1,2] and define qualification and certification needs [3,4]
Yet, a current lack of standardised measurements science and protocols impedes the wider acceptance of industrial AM. Few companies can afford to develop their own internal foundations for qualification of materials, processes, and parts built with AM .
How do you combine design guiderules for SLM and topology optimisation? How do you prioritise the design optimisation tasks while minimising the design iterations?
Industrial designers do not yet have a clear framework to review, redesign, and optimise existing designs in order to take full advantage of the benefits that SLM can offer.
In this post, we present the methodology used to redesign an aluminium bracket for SLM in order to save weight while maintaining performance. The key objective is to take into account the manufacturing constraints, user’s requirements and take advantage of technology’s design freedom.
We provide practical and actionable info dedicated to additive manufacturing of high-value metal components