Single specimen method for determining upper shelf fracture toughness shifts using precracked Charpy specimens

Conference · Fri Jan 01 04:00:00 EST 1982 · Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States)

OSTI ID:5828482

Pavinich, W A ^[1]; Futato, R J; Neale, B K; Lowe, A L; Van Der Sluys, W A

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1. Babcock and Wilcox Co., Lynchburg, VA

A joint program between Babcock and Wilcox (B and W) and Central Electricity Generating Board (CEGB) was undertaken to develop a three-point bend procedure for generating J/sub 1/-R curves from irradiated and unirradiated Charpy specimens. Precracked Charpy specimens provided by the CEGB were tested to verify similarity of room temperature single and multiple specimen tests. Close agreement between critical J values and tearing moduli was found. Several single specimen tests were carried out at temperatures between 20C and 350C to verify elevated temperature test performance. Upper shelf behavior was observed in all these tests. Measured crack lengths were usually within .125 mm of calculated crack lengths. J/sub 1/-R curves generated from precracked Charpy specimens were compared with J/sub 1/-R curves of 1T and 0.5T compact fracture specimens. Results were similar provided that side-grooving depths of the Charpy specimens did not exceed 10% of specimen thickness.

• OSTI ID: 5828482
• Report Number(s): CONF-820628-
• Conference Information: Journal Name: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States) Journal Volume: 782
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
ALLOYS
CHARPY TEST
CRACKS
DESTRUCTIVE TESTING
FRACTURE PROPERTIES
IMPACT TESTS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
STEEL-ASTM-A302
STEEL-ASTM-A508
STEELS
TESTING