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

Patent · Sat Jan 01 00:00:00 EST 1994

OSTI ID:869104

Alexander, David J ^[1]

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1. Oak Ridge, TN

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• Assignee: Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
• Patent Number(s): US 5275057
• OSTI ID: 869104
• Country of Publication: United States
• Language: English

Related Subjects

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/