A Review on Mechanical and Corrosion Behaviour of DMLS Materials

Abstract

Direct Metal Laser Sintering (DMLS) is an Additive Manufacturing (AM) technique in which the metal powder will be sintered in selected regions as per 3D CAD file in stack manner in order to produce a three dimensional object with less effort, in less possible time and with minimal wastage of metal. In this paper most widely used DMLS metal powders mechanical and corrosion properties were analyzed and the effect of post processes on the material properties were discussed. The objective of the paper is to fuse the works done so far and to identify gaps to identify the key areas of this technology. The promising and successful application of this revolutionary technology in various sectors like biomedical, aerospace and automotive was also discussed based on material behaviour at different operating conditions. This review would help researchers to find challenges in this booming technology. As per the materials point of view future research prospective was suggested in depth in light of present review.

On 3D printing of customized multi-root dental implants for the strategic tooth of canine by direct metal laser sintering

“…MRDI printing by DMLS : After analyzing individual subassemblies, these are imported into a build plate of volume 140 × 140 × 100 mm 3 on 3DXpert software of the 3D system. After this, orientation, support type and support height were adjusted, and the print command was given for full-scale printing with auto-placement mode throughout the build plate as per previously reported studies (Subrahmanyam et al , 2020). This virtual printable CAD model was generated on the software and then printed using ProX® DMP 200 commercial metal printer using 17–4 PH SS grade-B powder with its default dental configuration.…”

Effects of hot isostatic pressing and heat treatments on structural and corrosion properties of direct metal laser sintered parts

“…After the HIP procedure, the micro porosities in the structure decrease considerably. DMLS as-built samples have porosity due to the nature of the production method, making the samples susceptible to micro-cracks (Subrahmanyam et al , 2020; Cabrini et al , 2019; Aboulkhair et al , 2014). These cracks preferentially form starting points for corrosion damage in corrosive environments (Cabrini et al , 2016a).…”

Direct Metal Laser Sintering of Precious Metals for Jewelry Applications: Process Parameter Selection and Microstructure Analysis

“…Although due to the sintering process, DMLS usually leads to fabricating parts that have more porosity than the melting method, the disadvantageous effect of the pores can be reduced by optimizing the process parameters and additional surface treatment. The mechanical properties and quality of a properly optimized DMLS product are acceptable, and the product behavior in high-stress environments is quite reliable [34], [35]. DMLS is mostly limited to alloys with low melting points.…”