A METHOD OF MEASURING CRACK PROPAGATION RATES IN BRITTLE MATERIALS

A METHOD OF MEASURING CRACK PROPAGATION RATES IN BRITTLE MATERIALS

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 techniq...

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Bibliographische Detailangaben
Hauptverfasser: Lowry, Ned M, Mulkey, Owen R, Kuronen, J Michael, Bieber, James W
Format: Report
Sprache:eng
Schlagworte:
BRITTLENESS
CRACK PROPAGATION
CRACKS
FRACTURE(MECHANICS)
MEASUREMENT
Mechanics
Properties of Metals and Alloys
STRESS CORROSION
SURFACE PROPERTIES
TITANIUM ALLOYS
VACUUM APPARATUS
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Beschreibung
Zusammenfassung: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.