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Title: 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:
 [1]; ;  [2];  [3]
  1. NASA Glenn Research Center, Structures and Materials Division, Cleveland, Ohio 44135 (United States)
  2. Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
  3. 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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In-situ diffraction investigation of superelastic NiTi shape memory alloys under mechanical stress with neutrons and with synchrotron radiation
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First In Situ Lattice Strains Measurements Under Load at VULCAN
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Effect of Upper-Cycle Temperature on the Load-Biased, Strain-Temperature Response of NiTi
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Diffraction measurements of elastic strains in stainless steel subjected to in situ biaxial loading
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On elastic moduli and elastic anisotropy in polycrystalline martensitic NiTi
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An in situ neutron diffraction study of shape setting shape memory NiTi
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Temperature dependent deformation of the B2 austenite phase of a NiTi shape memory alloy
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In situ neutron diffraction studies of martensitic transformations in NiTi polycrystals under tension and compression stress
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In-situ measurement of texture and elastic strains with HIPPO–CRATES
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VULCAN—The engineering diffractometer at the SNS
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Thermoelastic and texture behavior of aluminum at high pressure and high temperature investigated by in situ neutron diffraction
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Measurement of the lattice plane strain and phase fraction evolution during heating and cooling in shape memory NiTi
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Design, implementation, and testing of a cryogenic loading capability on an engineering neutron diffractometer
journal, June 2010


A versatile automated sample changer for texture measurements on the high pressure-preferred orientation neutron diffractometer
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Role of B19′ martensite deformation in stabilizing two-way shape memory behavior in NiTi
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Thermo-mechanical characterization of shape memory alloy torque tube actuators
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Smart wing shape memory alloy actuator design and performance
conference, May 1997