Accession Number:

ADA045185

Title:

The Effects of Weld Porosity on the Fracture Toughness of A514F Steel.

Descriptive Note:

Interim rept.,

Corporate Author:

CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN ILL

Personal Author(s):

Report Date:

1977-09-01

Pagination or Media Count:

28.0

Abstract:

This report presents the results of an investigation conducted to evaluate the effects of clustered and linear porosity on the impact dynamic tear and dynamic fracture toughness of American Society for Testing and Materials ASTM A514 grade F steel welds. Tests were conducted using standard 1.59-cm dynamic tear specimens in a dynamic tear machine. Tests were also conducted using instrumentation recently developed for use with the dynamic tear machine. Results indicated that the upper shelf fracture toughness of welds containing clustered or linear porosity is sufficient to permit large-scale plastic deformation prior to fracture. However, the ductile-to-brittle transformation in welds containing linear porosity may be elevated to normal operating temperatures, thus increasing the possibility of catastrophic fracture. The instrumented dynamic tear test was found to provide a means of calculating dynamic fracture toughness values on the lower shelf and a lower bound for fracture toughness on the upper shelf in high-strength structural steels. Author

Subject Categories:

  • Metallurgy and Metallography
  • Couplers, Fasteners and Joints

Distribution Statement:

APPROVED FOR PUBLIC RELEASE