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Crystals 2018, 8(9), 348;

Bending Behavior of a Wrought Magnesium Alloy Investigated by the In Situ Pinhole Neutron Diffraction Method

Spallation Neutron Source, Oak Ridge National Laboratory, 1 Bethel Valley Rd, Oak Ridge, TN 37831, USA
Author to whom correspondence should be addressed.
Received: 31 July 2018 / Revised: 26 August 2018 / Accepted: 27 August 2018 / Published: 30 August 2018
(This article belongs to the Special Issue Neutron Diffractometers for Single Crystals and Powders)
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The tensile twinning and detwinning behaviors of a wrought magnesium alloy have been investigated during in situ four-point bending using the state-of-the-art high spatial resolution pinhole neutron diffraction (PIND) method. The PIND method allowed us to resolve the tensile twinning/detwinning and lattice strain distributions across the bending sample during a loading-unloading sequence with a 0.5 mm step size. It was found that the extensive tensile twinning and detwinning occurred near the compression surface, while no tensile twinning behavior was observed in the middle layer and tension side of the bending sample. During the bending, the neutral plane shifted from the compression side to the tension side. Compared with the traditional neutron diffraction mapping method, the PIND method provides more detailed information inside the bending sample due to a higher spatial resolution. View Full-Text
Keywords: pinhole neutron diffraction; Mg alloys; bending; tensile twinning pinhole neutron diffraction; Mg alloys; bending; tensile twinning

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Wu, W.; Stoica, A.D.; Yu, D.; Frost, M.J.; Skorpenske, H.D.; An, K. Bending Behavior of a Wrought Magnesium Alloy Investigated by the In Situ Pinhole Neutron Diffraction Method. Crystals 2018, 8, 348.

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