On the Process and Product Fingerprints for Electro Sinter Forging (ESF)

Area of Science:

• Materials Science
• Manufacturing Engineering

Background:

• Electro sinter forging (ESF) is an advanced manufacturing technique utilizing high electrical currents.
• It falls under electrical current assisted sintering (ECAS) processes, relying on internal Joule heating of compacted powders.

Purpose of the Study:

• To optimize the electro sinter forging process for commercially pure titanium.
• To analyze the influence of key process parameters on material properties and their validity as product fingerprints.

Main Methods:

• Investigated the effects of electrical current density, sintering time, and compaction pressure on titanium powder.
• Manufactured small discs and rings for testing.
• Evaluated relative density, microstructures, hardness, and tensile/compressive strengths.

Main Results:

• Process parameters were optimized, yielding predictable material properties.
• Microstructural analysis distinguished between sintering and melting.
• Mechanical properties correlated with process parameters, showing similar trends across different sample shapes.

Conclusions:

• Electrical current density, sintering time, and compaction pressure are critical process fingerprints for ESF.
• These parameters effectively control titanium's density, microstructure, and mechanical performance.
• ESF is a viable method for producing titanium components with tailored properties.