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

Patent · Fri Dec 31 23:00:00 EST 1993

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: LOCKHEED MARTIN ENRGY SYST INC
• 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

/73/33/374/
arms
assured
attachment
axial
center
clip
clip gage
control
cylindrical
cylindrical tube
device
directly
displacement
elevated
elevated temperature
extensometer
fracture
fracture toughness
frictionless
furnace
gage
high-temperature
improved
improved fracture
located
located outside
materials
measurement
mechanical
operated
operation
orientations
outside
placement
positive
positive control
providing
providing improved
providing positive
relationship
remote
rod
signal
specimen
temperature
temperature furnace
testing
tests
toughness
transfers
tube
vertical
virtually