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1. (WO2018144322) NANOPARTICLE COMPOSITE WELDING FILLER MATERIALS, AND METHODS FOR PRODUCING THE SAME

Pub. No.:    WO/2018/144322    International Application No.:    PCT/US2018/015338
Publication Date: Fri Aug 10 01:59:59 CEST 2018 International Filing Date: Sat Jan 27 00:59:59 CET 2018
IPC: B23K 35/28
B23K 35/02
Applicants: HRL LABORATORIES, LLC
Inventors: YAHATA, Brennan
MAYER, Justin
MARTIN, John
Title: NANOPARTICLE COMPOSITE WELDING FILLER MATERIALS, AND METHODS FOR PRODUCING THE SAME
Abstract:
A universal approach is described to produce welding filler materials with enhanced grain refining, for making welded objects with hot-crack resistance. Some variations provide a welding filler material comprising a functionalized metalcontaining powder, wherein the functionalized metal-containing powder comprises metal or metal alloy particles and a plurality of nanoparticles disposed on surfaces of the metal or metal alloy particles, and wherein the nanoparticles are consolidated in a three-dimensional architecture throughout the welding filler material. A welded object contains a welding filler material comprising the functionalized metalcontaining powder, enabling the welded object to be free of hot cracks. Other variations provide methods of making a welding filler material. This approach has been successfully demonstrated by incorporating zirconium-based nanoparticle grain refiners within a welding precursor material for welding aluminum alloy Al 7075, as one non-limiting example.