In a paper entitled “Mechanical Properties of 17-4 PH Stainless Steel Additively Manufactured under Ar and N2 Shielding Gas,” a team of researchers investigated the effect of argon or nitrogen as a protective gas on the final mechanical properties of additive 17-4 PH stainless steel.
The effects of nitrogen, argon, helium and other protective gases on the properties of carbon steel, stainless steel and aluminum alloy were studied. The researchers focus in this study on “modeling the thermal response of 17-4 PH SS by simulating a single track during typical L-PBF conditions while considering convection heat transfer for different shielding gases.”
This research may provide valuable insights into how to better avoid defects in additive manufacturing parts such as porosity and lack of fusion. In particular, metal additive manufacturing is a very accurate science, which involves a lot of chemical knowledge and mathematical calculation, in order to create the optimal conditions for 3D printing.According to the researchers, manufacturers may be able to change the conditions of 3D printed parts to get better overall final parts.