Some defects found in parts built using AM are related to processing parameters or to the composition of alloys optimised for more conventional, slow-cooling manufacturing process. These defects – such as porosity or cracking – can sometimes be healed by post-processing such as hot isostatic pressing (HIP). Yet, the formation of pores during AM is also linked to the quality of virgin powder.
Depending on the mechanism involved in its creation, each type of particles has specific physical characteristics that can impact powder recyclability and contribute defects to the final products. Two key mechanisms are responsible for spatter formation and powder bed denudation in the vicinity of the laser track. Let’s have a look at these.
So it’s best to make sure you have all the unbiased facts at hand to invest your cash sensibly.
In the next 3 articles, we’ll review the points you will want to keep in mind before you invest in AM technology. Hardware, ease of use, maintenance and end-products quality are a few topics you’ll want to discuss in detail with the suppliers. In the first part, let’s have a look at the hardware itself and what you should pay attention to.
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