caa a22 4500 463232232 CHVBK 20180405153245.0 cr unu---uuuuu 170326e20070101xx s 000 0 eng 10.1007/s10853-006-1258-2 doi (NATIONALLICENCE)springer-10.1007/s10853-006-1258-2 Microstructural development and solidification cracking susceptibility of Cu deposits on steel: Part I [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. The goal of this work was to identify the range of Cu compositions in steel that cause cracking and understand the cracking susceptibility through analysis and modeling of microstructural development. A wide range of steel-Cu deposits, from approximately 3 to 97wt% Cu, were fabricated using the gas tungsten arc welding (GTAW) process with cold wire feed. The deposits were found to be crack free when the concentration of Cu was below approximately 5wt% or above approximately 52wt%. Cracking was observed in deposits with Cu concentration between approximately 5 and 43wt%. Thus, to ensure crack free deposition of Cu onto Steel, the concentration of the first layer must be about 52wt% Cu or greater. The corresponding volume fraction of terminal Cu in samples that cracked was between approximately 0.1 and 27%. The resultant microstructures were characterized by various microscopy techniques to understand the influence of Cu on solidification cracking. Additionally, solidification modeling was undertaken to determine the amount of terminal Cu rich liquid that would form under equilibrium and 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), 495-509 0022-2461 42:2<495 2007 42 10853 https://doi.org/10.1007/s10853-006-1258-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1258-2 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), 495-509 0022-2461 42:2<495 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 463232046 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer