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

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/1.5033566· OSTI ID:1479775

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.

Research Organization:
Oak Ridge National Lab. (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
Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

References (18)

Microstructural and micromechanical characterization of IN718 theta shaped specimens built with electron beam melting journal April 2016
Unraveling structural evolution of LiNi0.5Mn1.5O4 by in situ neutron diffraction journal January 2013
Revealing the cyclic hardening mechanism of an austenitic stainless steel by real-time in situ neutron diffraction journal October 2014
In situ neutron diffraction measurement of transient temperature and stress fields in a thin plate journal June 2006
Event-based processing of neutron scattering data at the Spallation Neutron Source journal May 2018
In-situ observation of inhomogeneous degradation in large format Li-ion cells by neutron diffraction journal August 2013
NRSF2 load frame: design, control, and testing journal June 2007
First In Situ Lattice Strains Measurements Under Load at VULCAN journal October 2010
α-Phase transformation kinetics of U – 8 wt% Mo established by in situ neutron diffraction journal August 2016
Temperature-dependent behavior of a polycrystalline NiTi shape memory alloy around the transformation regime journal April 2013
A portable hydro-thermo-mechanical loading cell for in situ small angle neutron scattering studies of proton exchange membranes journal October 2013
In situ neutron scattering study of nanoscale phase evolution in PbTe-PbS thermoelectric material journal August 2016
Probing Multiscale Transport and Inhomogeneity in a Lithium-Ion Pouch Cell Using In Situ Neutron Methods journal October 2016
Visualizing the Structural Evolution of LSM/xYSZ Composite Cathodes for SOFC by in-situ Neutron Diffraction journal June 2014
Investigation of deformation dynamics in a wrought magnesium alloy journal November 2014
Operando Lithium Dynamics in the Li-Rich Layered Oxide Cathode Material via Neutron Diffraction journal January 2016
Deformation dynamics study of a wrought magnesium alloy by real-time in situ neutron diffraction journal September 2013
A new stroboscopic neutron diffraction method for monitoring materials subjected to cyclic loads: Thermal cycling of metal matrix composites journal September 1996

Cited By (1)

A suite-level review of the neutron powder diffraction instruments at Oak Ridge National Laboratory journal September 2018

Figures / Tables (9)