Accession Number:

AD0750710

Title:

Dynamic Fracture Toughness Determined from Instrumented Pre-Cracked Charpy Tests.

Descriptive Note:

Technical rept.,

Corporate Author:

CALIFORNIA UNIV LOS ANGELES SCHOOL OF ENGINEERING AND APPLIED SCIENCE

Personal Author(s):

• Server,William Leon

Report Date:

1972-08-01

Pagination or Media Count:

106.0

Abstract:

The use of an instrumented impact hammer on pre-cracked Charpy V-notch specimens led to a reliable and inexpensive method for determining dynamic fracture toughness. Measurements were made on A-533, Grade B, Class 1 steel from -125F to 75F. The data were found to be in excellent agreement with those obtained by other workers on much larger specimens. Similar tests were run with standard Charpy V-notch specimens to determine dynamic tensile yield strength values. A comparison of the dynamic yield and toughness values suggests a meaningful technique for estimating the NDT temperature, which should be of practical value in nuclear reactor surveillance programs. Author

Descriptors:

• (*IMPACT TESTS
• *FRACTURE(MECHANICS))
• STEEL
• PRESSURE VESSELS
• NUCLEAR REACTORS
• TENSILE PROPERTIES
• DUCTILITY
• FATIGUE(MECHANICS)
• CRACK PROPAGATION
• DYNAMICS

Subject Categories:

• Test Facilities, Equipment and Methods
• Nuclear Power Plants and Fission Reactor Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE