Please use this identifier to cite or link to this item: https://apo.ansto.gov.au/dspace/handle/10238/6366
Title: High-resolution strain mapping through time-of-flight neutron transmission diffraction
Authors: Tremsin, AS
McPhate, JB
Vallerga, JV
Siegmund, OHW
Kockelmann, W
Paradowska, AM
Zhang, SY
Kelleher, J
Steuwer, A
Feller, WB
Keywords: Spatial resolution
Thermal nethtrons
Cold neutons
Spatial resolution
Bioelectricity
Strains
Issue Date: 21-Nov-2013
Publisher: Trans Tech Publications
Citation: Tremsin, A. S., McPhate, J. B., Vallerga, J. V., Siegmund, O. H. W., Kockelmann, W., Paradowska, A., Zhang, S. Y., Kelleher, J., & Feller, W. B. (2013). High-resolution strain mapping through time-of-flight neutron transmission diffraction. Materials Science Forum, 772, 9-13. doi:10.4028/www.scientific.net/MSF.772.9
Abstract: The spatial resolution of time of flight neutron transmission diffraction was recently improved by the extension of photon/electron counting technology to imaging of thermal and cold neutrons. The development of novel neutron sensitive microchannel plates enables neutron counting with spatial resolution of ~55 um and time-of-flight accuracy of ~1 us, with efficiency as high as 70% for cold and ~40% for thermal neutrons. The combination of such a high resolution detector with a pulsed collimated neuron beam provides the opportunity to obtain a 2-dimensional map of neutron transmission spectra in one measurement. The results of our neuron transmission measurements demonstrate that maps of strains integrated along the beam propagation direction can be obtained with ~100 microstrain accuracy and spatial resolution of ~100 um providing there are sufficient neutron events collected. In this paper we describe the capabilities of the MCP neutron counting detectors and present the experimental results of 2-dimensional strain maps within austenitic steel compact tension (CT) crack samples measured at the ENGIN-X beamline of the ISIS pulsed neutron source. © 2014, Trans Tech Publications.
Gov't Doc #: 6209
URI: http://dx.doi.org/10.4028/www.scientific.net/MSF.772.9
http://apo.ansto.gov.au/dspace/handle/10238/6366
ISSN: 0255-5476
Appears in Collections:Journal Articles

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