Accession Number:

ADA073395

Title:

Fracture Toughness Characterization of Selected Ultra High Carbon Steels.

Descriptive Note:

Master's thesis.,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1979-06-01

Pagination or Media Count:

75.0

Abstract:

This effort, part of an ongoing program examining the microstructural and mechanical properties of extensively warm-worked ultra high carbon UHC steels, was directed at measurement of the fracture toughness of these steels. A facility was constructed to test bend-type fracture toughness specimens in accordance with the American Society for Testing and Materials ASTM Standard E399-78 several UHC steel alloys were evaluated and the results correlated with microstructural and other mechanical test results. With one exception, processing failed to eliminate coarse carbides from the microstructures of these materials and fracture toughness, KIC, values were accordingly low. A commercial alloy, AISI 52100, processed similarly to the other experimental alloys, did not have the coarse carbides present to as great an extent, and was significantly tougher, as manifested by a strength ratio twice that of the other alloys. Author

Subject Categories:

  • Properties of Metals and Alloys
  • Test Facilities, Equipment and Methods
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE