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

Patent · Tue Jan 04 04:00:00 EST 1994

OSTI ID:5152107

Alexander, D J

An attachment for placement between a test specimen and a remote clip gage extensometer providing improved fracture toughness tests of materials at elevated temperature is described. 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. 1 figure.

• DOE Contract Number: AC05-84OR21400
• Assignee: Martin Marietta Energy Systems, Inc., Oak Ridge, TN ()
• Patent Number(s): A; US 5275057
• Application Number: PPN: US 7-932477
• OSTI ID: 5152107
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420500* -- Engineering-- Materials Testing
440800 -- Miscellaneous Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
DESIGN
DISPLACEMENT GAGES
MATERIALS TESTING
MEASURING INSTRUMENTS
MEASURING METHODS
MECHANICAL TESTS
OPERATION
TEST FACILITIES
TESTING