ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 5

J-Integral Testing of Aluminum Alloys: A New Technique for Marking Crack Fronts

Beaver, PW
Research Scientist, Aeronautical Research Laboratories, Melbourne,

Abstract

An important aspect of the standardized J_Ic test method is the measurement of the amount of crack extension as a function of load. The usual method of marking crack fronts for subsequent measurement in a luminum alloys is to fatigue cycle after initial static crack extension.

In this paper, a new technique for marking crack fronts in aluminum alloys is described. This new technique, based on liquid metal embrittlement of grain boundaries in aluminum by gallium, is, for the alloys examined in this work, a more effective method of crack front marking than fatigue cycling.

Keywords:
J-integral testing, aluminum alloys, crack front marking, multiple specimen technique

Paper ID: JTE11033J
DOI: 10.1520/JTE11033J
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