The DMLS Knowledge Hub
DMLS 3D is the definitive technical resource for Direct Metal Laser Sintering — the process that has become the backbone of metal additive manufacturing in aerospace, medical devices, and industrial tooling. We cover process physics, alloy metallurgy, design rules, post-processing requirements, and production qualification with the specificity that engineers actually need.
Ben Stagl (20-year fabrication veteran, SAIC professor in Architecture and Designed Objects, sand-mold casting for the Uber HQ feature wall) and Max Davis (MAXCNC) have spent careers at the intersection of design intent and manufacturing reality. DMLS is the technology that most directly closes that gap for metal — and the one that most demands genuine process understanding.
What is DMLS?
Direct Metal Laser Sintering is a powder bed fusion (PBF) process in which a high-power Yb:fiber laser (200–400W) selectively melts successive layers of pre-alloyed metal powder. Despite the name — a trademark of EOS GmbH — DMLS produces fully melted, not merely sintered, parts. Density: 99.5% theoretical. Mechanical properties comparable to wrought equivalents in most alloys after appropriate heat treatment.
The physics:
- Roller/blade deposits 20–100 µm layer of powder
- Laser scans cross-section per CAD slice geometry
- Build platform drops one layer thickness
- Repeat 1,000–10,000 times per part
Build rate: 5–20 cm³/hour depending on alloy, layer thickness, and geometry. Energy density: 50–100 J/mm³ for most alloys; deviation causes porosity or delamination.
Competitive Landscape We Track
- EOS (GmbH, Germany) — the DMLS originator; M290, M300, M400 platforms
- Trumpf — TruPrint series; highest productivity for medical/dental
- SLM Solutions — multi-laser NXG XII 600 for aerospace volume
- 3D Systems — DMP Flex/Factory series; aerospace pedigree
- Renishaw — AM400, AM500; UK aerospace supply chain
Our Process Data
All mechanical data cited on this site is sourced from:
- Proto Labs production data (AlSi10Mg, 17-4 PH, 316L, Ti6Al4V)
- EOS material datasheets
- ASTM/AMS specifications
- Peer-reviewed DMLS literature (see PubMed feed)
Data is not marketing copy. Where ranges are cited, they reflect real process variation.