Mechanical Energy Absorption Ability of Titanium-Based Porous Structures Produced by Various Powder Metallurgy...

Area of Science:

• Materials Science
• Mechanical Engineering

Background:

• Porous materials effectively absorb mechanical energy, crucial for applications like advanced armor.
• Titanium-based structures offer potential for enhanced anti-ballistic protection.

Purpose of the Study:

• To manufacture porous titanium-based structures using powder metallurgy.
• To investigate the influence of pore-forming agents and sintering methods on material properties.
• To evaluate the energy absorption characteristics of the fabricated porous titanium.

Main Methods:

• Powder metallurgy using titanium hydride (TiH2) powder.
• Sintering with pore-forming agents (NaCl, ammonium carbonate).
• Liquid phase reactive sintering for Ti-Al structures.
• Mechanical compression testing at various strain rates.
• Resonant frequency method for damping and elastic modulus determination.

Main Results:

• Porous titanium structures were successfully fabricated.
• Dehydrogenation of TiH2 powder facilitated activated sintering and porosity control.
• Porous titanium produced with ammonium carbonate exhibited promising energy absorption properties.
• Microstructure, porosity, and mechanical characteristics were comparatively analyzed.

Conclusions:

• Porous titanium-based materials can be effectively produced via powder metallurgy.
• The choice of pore-forming agent significantly impacts energy absorption.
• Ammonium carbonate is a promising agent for creating porous titanium with superior energy absorption.