Evaluation of the unloading compliance procedure for J integral testing in the hot cell. Final report

Technical Report · Tue Jan 01 00:00:00 EST 1980

OSTI ID:5510233

Clarke, G A

A testing program was initiated to develop a procedure for toughness testing of irradiated materials using J integral methods. An evaluation of presently used procedures and improved techniques was completed to increase the reliability of the unloading compliance method for single specimen J/sub Ic/ determination. Three different heats of pressure vessel steels were used to evaluate the reliability and accuracy of the unloading compliance procedure. A new technique for improved sensitivity of displacement measurements was found to be successful on large 4T specimens. This technique consisted of using a small electrical linear actuator to continuously rezero a 0.635 mm (.025 inch) LVDT. The effects of specimen geometry on both J/sub Ic/ and dJ/da were evaluated using various specimen sizes and varying amounts of side grooving.

• Research Organization: Westinghouse Electric Corp., Pittsburgh, PA (USA). Research and Development Center
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5510233
• Report Number(s): NUREG/CR-1070; ORNL/SUB-7394/1; TRN: 80-005113
• Country of Publication: United States
• Language: English

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