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 : AUG 1972

Pagination or Media Count : 106

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 Eng

Distribution Statement : APPROVED FOR PUBLIC RELEASE