Engineers 3D-print high-strength weldable aluminium
US-based researchers have developed a technique to 3D-print high-strength aluminium alloys that don't crack during welding. The "100-year-old welding problem" was solved by lacing the aluminium powder with Zirconium-based nanoparticles. The technique prevents hot cracking and allows for retention of full strength in the manufactured part for possible use in industry and defence, said researchers. 