Showing papers by "Arnold R. Marder published in 2013"
03 Apr 2013
TL;DR: The hard martensite layer that forms adjacent to the fusion line of austenitic/ferritic dissimilar metal welds has been investigated by microstructural characterization and mechanical testing methods.
Abstract: The hard martensite layer that forms adjacent to the fusion line of austenitic/ferritic dissimilar metal welds has been investigated by microstructural characterization and mechanical testing methods. Residual stress measurements were made in the vicinity of the fusion line in both the substrate and overlay materials and fatigue crack propagation tests were performed as to allow the crack to propagate along the dissimilar alloy weld fusion line. This hard martensite layer was found to be non-detrimental to the fatigue crack growth response, as the majority of the fatigue cracks propagated across the martensite layer and fusion line and into the substrate. The compressive residual stresses within the substrate contributed to the enhancement of the growth response of the weld overlay specimens. Based on these results, the hard martensite layer should not be a major factor in causing failure along the fusion line in austenitic/ferritic dissimilar metal weld overlay applications.
2 citations