caa a22 4500 463232046 CHVBK 20180405153245.0 cr unu---uuuuu 170326e20070101xx s 000 0 eng 10.1007/s10853-006-1259-1 doi (NATIONALLICENCE)springer-10.1007/s10853-006-1259-1 Microstructural development and solidification cracking susceptibility of Cu deposits on steel: Part II—use of a Ni interlayer [Elektronische Daten] [Fredrick Noecker II, John DuPont] The tool and die industry is interested in depositing Cu onto steel using direct metal deposition techniques in order to improve thermal management of mold dies manufactured from steel alloys. However, Cu is a known promoter of solidification cracking in steel. Ni, however, is known to improve weldability of Cu containing alloys and steel. The goal of this work was to identify the range of Ni concentrations necessary to eliminate solidification cracking in Steel-Cu deposits and understand the cracking susceptibility through analysis and modeling of microstructural development. A wide range of Steel-Ni-Cu deposits, containing up to 75wt% Ni, and Ni-Cu deposits were fabricated using the Gas Tungsten Arc Welding (GTAW) process with cold wire feed. The Ni-Cu and Fe-Ni deposits were found to be crack free over the entire concentration range. However, Ni concentrations of up to 75wt% were insufficient to eliminate cracking when subsequent layers of Cu were deposited. Therefore, to ensure crack free deposition of Cu onto Steel, the concentration of the interlayer must be 100wt% Ni. The resultant microstructures were characterized by various microscopy techniques to understand the influence of Ni and Cu on solidification cracking of Steel. Additionally, solidification modeling was undertaken to determine the amount of terminal Cu rich liquid and solidification temperature range that would form under non-equilibrium solidification conditions. Springer Science+Business Media, LLC, 2006 Noecker II Fredrick Engineering Metallurgy Group, Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA, USA aut DuPont John Engineering Metallurgy Group, Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA, USA aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/2(2007-01-01), 510-521 0022-2461 42:2<510 2007 42 10853 https://doi.org/10.1007/s10853-006-1259-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1259-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Noecker II Fredrick Engineering Metallurgy Group, Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA, USA aut NATIONALLICENCE 700 1- DuPont John Engineering Metallurgy Group, Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA, USA aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/2(2007-01-01), 510-521 0022-2461 42:2<510 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 463232046 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer