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Gas-metal arc welding (GMAW) spiral overlay of Fe-12Cr-2Si wire onto a billet of T91. This process forms a sound microstructural bond, allowing the composite to be co-extruded at just 100°C below its melting point with excellent layer retention. Right Inset: Closeup of the GMAW weld overlay torch, with Fe-12Cr-2Si wire visible.
Photo Credit: Bortech Corp., Keene, NH
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Our Major Affiliations: MIT-SUTD International Design Centre (IDC) Dept. of Nuclear Science & Engineering Massachusetts Institute of Technology