Why is Inconel 718 well-suited for SLM 3D printing?

High Temperature Strength and Stability

Inconel 718 maintains exceptional mechanical strength up to 700 °C, making it ideal for components exposed to extreme thermal environments. When built via SLM 3D printing, its rapid solidification forms a fine microstructure with excellent phase stability. This makes it highly suitable for aerospace combustors, turbine vanes and heat shields.

Good Processability in SLM

Unlike some superalloys that suffer from cracking during solidification, Inconel 718 has a relatively wide processing window with lower susceptibility to hot tearing. This allows stable layer-by-layer melting with reduced risk of distortion. Its workability makes it one of the most commonly used additive manufacturing superalloys across both aerospace and power generation sectors.

Post-Process Enhancement Capability

After printing, Inconel 718 responds extremely well to heat treatment and HIP, which enhance γ′/γ″ precipitation, eliminate porosity and increase fatigue resistance. These processes enable SLM-built components to achieve performance levels comparable to forged or cast equivalents.

Dimensional Accuracy and Finishing

SLM enables near-net-shape production of Inconel 718 parts with excellent feature control. Critical dimensions can be refined using EDM or CNC machining, ensuring dimensional reliability in high-performance turbine, exhaust and pressure system components.