Investigation of dissimilar metal welds by energy-resolved neutron imaging.

ABSTRACT: A nondestructive study of the internal structure and compositional gradient of dissimilar metal-alloy welds through energy-resolved neutron imaging is described in this paper. The ability of neutrons to penetrate thick metal objects (up to several cm) provides a unique possibility to examine samples which are opaque to other conventional techniques. The presence of Bragg edges in the measured neutron transmission spectra can be used to characterize the internal residual strain within the samples and some microstructural features, e.g. texture within the grains, while neutron resonance absorption provides the possibility to map the degree of uniformity in mixing of the participating alloys and intermetallic formation within the welds. In addition, voids and other defects can be revea

SUBMITTER: Tremsin AS 

PROVIDER: S-EPMC4970494 | biostudies-literature | 2016 Aug

REPOSITORIES: biostudies-literature