RHEGAL: Resistive heating gas enclosure loadframe for in situ neutron scattering

An, Ke; Armitage, Douglas P.; Yu, Zhenzhen; Dickson, Richard W.; Mills, Rebecca A.; Feng, Zhili; Skorpenske, Harley David

doi:10.1063/1.5033566

Title: RHEGAL: Resistive heating gas enclosure loadframe for in situ neutron scattering

Journal Article · 21 September 2018 · Review of Scientific Instruments

DOI: https://doi.org/10.1063/1.5033566 · OSTI ID:1479775

^[1]; Armitage, Douglas P. ^[1]; Yu, Zhenzhen ^[2];

^[1]; Mills, Rebecca A. ^[1];

^[1]; Skorpenske, Harley David ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Colorado School of Mines, Golden, CO (United States)

In situ neutron scattering is a powerful tool to reveal materials atomic structural response such as phase transformation, lattice straining, and texture under external stimuli. The advent of a high flux neutron source such as the Spallation Neutron Source (SNS) allows fast measurement in even non-equilibrium conditions, i.e., phase transformation in steels. However, the commercial fast heating apparatus such as commercial physical simulation equipment is not designed for in situ neutron scattering, which limits its application to in situ materials research by using neutrons. Here we present a resistive heating gas enclosure loadframe (RHEGAL) for non-equilibrium phase transformation studies by using in situ neutron scattering, which takes the advantage of high flux neutron sources like SNS. RHEGAL enables fast resistive heating of metal samples to 1200 °C at a rate up to 60 °C/s in an inert atmosphere. It provides both horizontal and vertical positions for scattering optimization. The mechanical loading capability also allows in situ high temperature tension above the oxidation temperature limit. The optimized translucent neutron scattering window by silicon allows both reflection and transmission measurements, making this equipment applicable for neutron diffraction, small angle scattering, and imaging. Furthermore, to demonstrate the fast heating capability, the phase transformations of an example of advanced high strength steel heated at 3 °C/s and 30 °C/s were measured with the VULCAN engineering diffractometer, and the different phase transformation kinetics by neutron diffraction were presented.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1479775

Alternate ID(s):: OSTI ID: 1471798

Journal Information:: Review of Scientific Instruments, Vol. 89, Issue 9; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 2 works

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