Accession Number:

AD0661814

Title:

A METHOD OF MEASURING CRACK PROPAGATION RATES IN BRITTLE MATERIALS

Descriptive Note:

Corporate Author:

BOEING COMMERCIAL AIRPLANE CO RENTON WA

Report Date:

1967-05-01

Pagination or Media Count:

11.0

Abstract:

A method of measuring the rate of crack propagation is described. The method, applicable to any specimen having a smooth surface across which brittle-type fracture will occur, is accomplished by means of a fine gridwork of conducting lines applied to the specimen by various vacuum deposition techniques. When a potential is applied to the grid, a direct reading of current or distance versus time is obtained with a strip chart recorder or equivalent device. The method has been applied to the study of brittle-type fracture associated with stress corrosion cracking observed in titanium alloys.

Subject Categories:

  • Properties of Metals and Alloys
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE