Design and implementation of a multiaxial loading capability during heating on an engineering neutron diffractometer
Abstract
A gripping capability was designed, implemented, and tested for in situ neutron diffraction measurements during multiaxial loading and heating on the VULCAN engineering materials diffractometer at the spallation neutron source at Oak Ridge National Laboratory. The proposed capability allowed for the acquisition of neutron spectra during tension, compression, torsion, and/or complex loading paths at elevated temperatures. The design consisted of age-hardened, Inconel{sup ®} 718 grips with direct attachment to the existing MTS load frame having axial and torsional capacities of 100 kN and 400 N·m, respectively. Internal cooling passages were incorporated into the gripping system for fast cooling rates during high temperature experiments up to ~1000 K. The specimen mounting couplers combined a threaded and hexed end-connection for ease of sample installation/removal without introducing any unwanted loads. Instrumentation of this capability is documented in this work along with various performance parameters. The gripping system was utilized to investigate deformation in NiTi shape memory alloys under various loading/control modes (e.g., isothermal, isobaric, and cyclic), and preliminary results are presented. The measurements facilitated the quantification of the texture, internal strain, and phase fraction evolution in NiTi shape memory alloys under various loading/control modes.
- Authors:
-
- NASA Glenn Research Center, Structures and Materials Division, Cleveland, Ohio 44135 (United States)
- Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- Advanced Materials Processing and Analysis Center, Materials Science and Engineering Department, University of Central Florida, Orlando, Florida 32816 (United States)
- Publication Date:
- OSTI Identifier:
- 22305925
- Resource Type:
- Journal Article
- Journal Name:
- Review of Scientific Instruments
- Additional Journal Information:
- Journal Volume: 85; Journal Issue: 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
- Publisher:
- Optical Society of America
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 36 MATERIALS SCIENCE; CONTROL; DESIGN; NEUTRON DIFFRACTION; NEUTRON SOURCES; NEUTRON SPECTRA; NICKEL ALLOYS; ORNL; SHAPE MEMORY EFFECT; SPALLATION; STRAINS; TEMPERATURE RANGE 0400-1000 K; TITANIUM ALLOYS
Citation Formats
Benafan, O., E-mail: othmane.benafan@nasa.gov, Advanced Materials Processing and Analysis Center, Materials Science and Engineering Department, University of Central Florida, Orlando, Florida 32816, Padula, S. A., Skorpenske, H. D., An, K., and Vaidyanathan, R. Design and implementation of a multiaxial loading capability during heating on an engineering neutron diffractometer. United States: N. p., 2014.
Web. doi:10.1063/1.4896042.
Benafan, O., E-mail: othmane.benafan@nasa.gov, Advanced Materials Processing and Analysis Center, Materials Science and Engineering Department, University of Central Florida, Orlando, Florida 32816, Padula, S. A., Skorpenske, H. D., An, K., & Vaidyanathan, R. Design and implementation of a multiaxial loading capability during heating on an engineering neutron diffractometer. United States. https://doi.org/10.1063/1.4896042
Benafan, O., E-mail: othmane.benafan@nasa.gov, Advanced Materials Processing and Analysis Center, Materials Science and Engineering Department, University of Central Florida, Orlando, Florida 32816, Padula, S. A., Skorpenske, H. D., An, K., and Vaidyanathan, R. 2014.
"Design and implementation of a multiaxial loading capability during heating on an engineering neutron diffractometer". United States. https://doi.org/10.1063/1.4896042.
@article{osti_22305925,
title = {Design and implementation of a multiaxial loading capability during heating on an engineering neutron diffractometer},
author = {Benafan, O., E-mail: othmane.benafan@nasa.gov and Advanced Materials Processing and Analysis Center, Materials Science and Engineering Department, University of Central Florida, Orlando, Florida 32816 and Padula, S. A. and Skorpenske, H. D. and An, K. and Vaidyanathan, R.},
abstractNote = {A gripping capability was designed, implemented, and tested for in situ neutron diffraction measurements during multiaxial loading and heating on the VULCAN engineering materials diffractometer at the spallation neutron source at Oak Ridge National Laboratory. The proposed capability allowed for the acquisition of neutron spectra during tension, compression, torsion, and/or complex loading paths at elevated temperatures. The design consisted of age-hardened, Inconel{sup ®} 718 grips with direct attachment to the existing MTS load frame having axial and torsional capacities of 100 kN and 400 N·m, respectively. Internal cooling passages were incorporated into the gripping system for fast cooling rates during high temperature experiments up to ~1000 K. The specimen mounting couplers combined a threaded and hexed end-connection for ease of sample installation/removal without introducing any unwanted loads. Instrumentation of this capability is documented in this work along with various performance parameters. The gripping system was utilized to investigate deformation in NiTi shape memory alloys under various loading/control modes (e.g., isothermal, isobaric, and cyclic), and preliminary results are presented. The measurements facilitated the quantification of the texture, internal strain, and phase fraction evolution in NiTi shape memory alloys under various loading/control modes.},
doi = {10.1063/1.4896042},
url = {https://www.osti.gov/biblio/22305925},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 10,
volume = 85,
place = {United States},
year = {Wed Oct 01 00:00:00 EDT 2014},
month = {Wed Oct 01 00:00:00 EDT 2014}
}
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