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Influence of dissolved hydrogen on aluminum-lithium alloy fracture behaviorThe objective of this work is to study the effects of dissolved hydrogen on the mechanical properties of 2090 and 2219 alloys. Prior to mechanical testing, potentiostatic and potentiodynamic tests were performed using NaCl/HCl solutions varying in pH from 1.5 to 7.5 (3.5 pct NaCl in deionized water). After analysis of the potentiodynamic curve for each solution, several potentiostatic experiments were conducted for various times (from 10 minutes to several hours) with a cathodic overpotential of 300 mV. These experiments were performed to select charging conditions. It is shown that the fracture of L-S and T-S orientations proceeds via slipping of layers in the S-T direction. The T-S and L-S orientations fractured with substantially higher propagation energy that the L-T and T-L orientations, due in large part to the extensive delamination propagation of the fracture.
Document ID
19910059265
Document Type
Conference Paper
Authors
Rivet, F. C. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Swanson, R. E. (Virginia Polytechnic Institute and State University Blacksburg, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1989
Subject Category
METALLIC MATERIALS
Meeting Information
International Aluminum-Lithium Conference(Williamsburg, VA)
Distribution Limits
Public
Copyright
Other