Abstract
Hydrogen evolution behavior of an Al-Mg-Si alloy affected by hydrogen
embrittlement was investigated using a tensile testing machine equipped with quadruple
mass spectrometer in an ultrahigh vacuum chamber. Plate type test pieces were
solutionized at 540°C for 1h, quenched in water and then aged at 175°C for 8h or 240h.
Some of the aged test pieces were pre-deformed in air with a relative humidity of 90%
at a slow strain rate of 8.3x10-7s-1 to introduce hydrogen from the testing atmosphere.
As a result of the tensile test with mass spectrometry, it was shown that hydrogen was
highly evolved at the moment of fracture. The area fraction of intergranular fracture
decreased when the aging condition was changed from peak-aged to over-aged, which
was in agreement with the decrease in the amount of hydrogen evolved at the moment
of fracture.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference16 articles.
1. S. Kuramoto et al., J. Japan Inst. Metals, Vol. 52, No. 6 (2002), p.250.
2. S. Osaki et al., Journal of Japan Institute of Light Metals, Vol. 56, No. 2 (2006), p.121.
3. M. Kanno et al., J. Japan Inst. Metals, Vol. 59, No. 3 (1995), p.296.
4. G. A. Young and J. R. Scully, Hydrogen Effects on Material Behavior and Corrosion Deformation Interactions, Edited by Moody N.R. et al., TMS, (2003), p.893. 0 0. 5 1. 0 Displacement, d /mm.
5. 5 10-9 10-8 10-7 10-6 H2 Ion Current, i /A 0.