Titanium aerospace bracket DMLS metal 3D printing.

Project overview

ASTCAD partnered with an Australian aerospace subcontractor to convert a billet-machined Ti-6Al-4V bracket into a topology-optimised DMLS-printed equivalent. The new design carries the same loads with a 47% mass reduction and is fully qualified to AS 9100D requirements for flight service.

The challenge

The original bracket was overengineered — machined from billet for manufacturing convenience rather than load efficiency. The customer needed equivalent mechanical performance with significantly reduced mass for an aerospace application, plus full traceability and qualification documentation for flight service.

Our approach

• FEA-driven topology optimisation in nTopology
• DMLS print orientation analysis for support minimisation
• Heat-treatment protocol per ASTM F3001 (Ti-6Al-4V annealing)
• Post-print machining for critical interface surfaces
• Full qualification documentation per AS 9100D

Deliverables

• Topology-optimised bracket (47% lighter than original)
• FEA validation report with material allowables
• Manufacturing process documentation
• Material certifications and lot traceability
• Qualification test data and AS 9100D documentation

Outcome

The bracket passed qualification testing and entered low-rate production. Mass savings have been replicated across two other component families in the customer’s product line. The customer’s downstream aerospace integrator has approved the part for production aircraft installation.

How we approach DMLS 3D printing projects

DMLS 3D printing rewards design discipline. For metal parts like this titanium aerospace bracket we begin with topology optimisation against the real load cases, then re-model the organic result as clean, parametric CAD so it can be inspected and revised. Build orientation is chosen to balance support volume, surface finish on critical faces and residual stress; support strategies are documented, not improvised at the machine. We specify heat treatment and hot isostatic pressing where fatigue life matters, and define datum schemes for post-machining of interface surfaces so the printed part meets drawing tolerances.

Deliverables for metal additive manufacturing

A DMLS package from us includes the optimised CAD model, a fully toleranced 2D drawing with AM-specific notes, build orientation and support documentation, material and process specifications referencing ISO/ASTM 52900-series standards, and inspection requirements for critical features. Where the part replaces a machined or fabricated original, we provide a comparison summary — mass, stiffness, part count — so the engineering case for additive is documented for certification or internal approval.

When DMLS beats machining

The economics of DMLS 3D printing hinge on geometry and quantity. Parts with internal channels, organic load paths or consolidated assemblies favour additive strongly, because the complexity that would multiply machining setups costs nothing in the powder bed. Low quantities favour additive too — no tooling amortisation, no minimum order. Where DMLS loses is large simple geometry and tight-tolerance surfaces, which is why our designs specify post-machining only on the faces that need it and leave the rest as-printed. For this titanium aerospace bracket, the topology-optimised geometry was effectively unmachinable as a single part, making additive not just competitive but the only sensible route to the weight target.

We support DMLS projects from feasibility through to delivered metal — geometry assessment, optimisation, build preparation and supplier liaison with certified printing bureaus. If you have a machined or fabricated part that is heavy, expensive or slow to source, a short feasibility review will tell you whether metal additive manufacturing changes the equation before you commit to redesign.