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Title: Tensile testing of materials at high temperatures above 1700 °C with in situ synchrotron X-ray micro-tomography

A compact ultrahigh temperature tensile testing instrument has been designed and fabricated for in situ x-ray micro-tomography using synchrotron radiation at the Advanced Light Source, Lawrence Berkeley National Laboratory. It allows for real time x-ray micro-tomographic imaging of test materials under mechanical load at temperatures up to 2300 °C in controlled environments (vacuum or controlled gas flow). Sample heating is by six infrared halogen lamps with ellipsoidal reflectors arranged in a confocal configuration, which generates an approximately spherical zone of high heat flux approximately 5 mm in diameter. Samples are held between grips connected to a motorized stage that loads the samples in tension or compression with forces up to 2.2 kN. The heating chamber and loading system are water-cooled for thermal stability. The entire instrument is mounted on a rotation stage that allows stepwise recording of radiographs over an angular range of 180°. A thin circumferential (360°) aluminum window in the wall of the heating chamber allows the x-rays to pass through the chamber and the sample over the full angular range. The performance of the instrument has been demonstrated by characterizing the evolution of 3D damage mechanisms in ceramic composite materials under tensile loading at 1750 °C.
Authors:
; ;  [1] ;  [2] ; ;  [3] ;  [1] ;  [4]
  1. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
  2. Department of Materials Science and Engineering, University of California, Berkeley, California 94720 (United States)
  3. Teledyne Scientific Company, Thousand Oaks, California 91360 (United States)
  4. (United States)
Publication Date:
OSTI Identifier:
22314659
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ADVANCED LIGHT SOURCE; ALUMINIUM; CERAMICS; COMPOSITE MATERIALS; FLUORESCENT LAMPS; GAS FLOW; IMAGES; INFRARED RADIATION; MECHANICAL TESTS; PERFORMANCE; SYNCHROTRON RADIATION; TEMPERATURE RANGE OVER 4000 K; TENSILE PROPERTIES; TOMOGRAPHY; X RADIATION; X-RAY RADIOGRAPHY