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Title: Clip gage attachment for frictionless measurement of displacement during high-temperature mechanical testing

Abstract

An attachment for placement between a test specimen and a remote clip gage extensometer providing improved fracture toughness tests of materials at elevated temperature. Using a cylindrical tube and axial rod in new relationship, the device transfers the displacement signal of the fracture toughness test specimen directly to a clip gage extensometer located outside the high temperature furnace. Virtually frictionless operation is assured by having the test specimen center one end of the rod in one end of the tube, while the clip gage extensometer arms center the other end of the rod in the other end of the tube. By providing positive control over both ends of both rod and tube, the attachment may be operated in orientations other than vertical.

Inventors:
 [1]
  1. Oak Ridge, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
869104
Patent Number(s):
5275057
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G - PHYSICS G01 - MEASURING G01B - MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
clip; gage; attachment; frictionless; measurement; displacement; high-temperature; mechanical; testing; placement; specimen; remote; extensometer; providing; improved; fracture; toughness; tests; materials; elevated; temperature; cylindrical; tube; axial; rod; relationship; device; transfers; signal; directly; located; outside; furnace; virtually; operation; assured; center; arms; positive; control; operated; orientations; vertical; fracture toughness; elevated temperature; located outside; providing improved; temperature furnace; improved fracture; clip gage; positive control; providing positive; cylindrical tube; /73/33/374/

Citation Formats

Alexander, David J. Clip gage attachment for frictionless measurement of displacement during high-temperature mechanical testing. United States: N. p., 1994. Web.
Alexander, David J. Clip gage attachment for frictionless measurement of displacement during high-temperature mechanical testing. United States.
Alexander, David J. Sat . "Clip gage attachment for frictionless measurement of displacement during high-temperature mechanical testing". United States. https://www.osti.gov/servlets/purl/869104.
@article{osti_869104,
title = {Clip gage attachment for frictionless measurement of displacement during high-temperature mechanical testing},
author = {Alexander, David J},
abstractNote = {An attachment for placement between a test specimen and a remote clip gage extensometer providing improved fracture toughness tests of materials at elevated temperature. Using a cylindrical tube and axial rod in new relationship, the device transfers the displacement signal of the fracture toughness test specimen directly to a clip gage extensometer located outside the high temperature furnace. Virtually frictionless operation is assured by having the test specimen center one end of the rod in one end of the tube, while the clip gage extensometer arms center the other end of the rod in the other end of the tube. By providing positive control over both ends of both rod and tube, the attachment may be operated in orientations other than vertical.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

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