Accession Number:

AD0262244

Title:

FRACTURE TOUGHNESS OF 4330V (MOD PLUS SI) STEEL UNDER PLANE STRAIN CONDITIONS

Descriptive Note:

Corporate Author:

FRANKFORD ARSENAL PHILADELPHIA PA

Personal Author(s):

Report Date:

1961-01-01

Pagination or Media Count:

1.0

Abstract:

An investigation was conducted to study size effects in notch tension testing and to determine the fracture toughness of 4330V Mod Si steel under plane strain conditions. Fracture studies using circumferentially notched round specimens 0.505, 0.750, and 3 in. in diameter of 4330V Mod Si steel tempered at 600 and at 850 F, are described. Using the mathematical model including plastic strain zone correction proposed by Irwin Plastic Zone Near a Crack and Fracture Toughness, Contribution to 7th Sagamore Conference, 1960 the data were analyzed and the fracture toughness values were computed. Good agreement was found between fracture toughness values for the small specimens, but a somewhat lower value was found for the 3-in. specimens. This deviation is discussed in light of statistical size effects. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE