Details
| Original language | English |
|---|---|
| Article number | 140776 |
| Journal | Materials Science and Engineering A |
| Volume | 804 |
| Early online date | 16 Jan 2021 |
| Publication status | Published - 15 Feb 2021 |
Abstract
The mechanical response of a commercial aluminum alloy, AA7085, was examined using slow strain rate testing in dry air and humid air at 70 °C. These tests and fractographic observations confirmed that the alloy suffered from hydrogen embrittlement when exposed to humid air. Crack initiation was studied in both environments to evaluate the effect of humidity on crack nucleation. Observations from both slow strain rate tests and constant displacement tests were compared. Specimens from slow strain rate testing were examined after fracture while constant displacement testing allowed periodic observations of the sample surface. Based on these observations, a mechanism for the crack initiation in humidity has been proposed for AA7085 that does not involve substantial contribution from anodic dissolution.
Keywords
- AA7085, Constant displacement testing, Crack initiation, Humidity, Hydrogen, Slow strain rate testing
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: Materials Science and Engineering A, Vol. 804, 140776, 15.02.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Crack initiation of an industrial 7XXX aluminum alloy in humid air analyzed via slow strain rate testing and constant displacement testing
AU - Schwarzenböck, Elisabeth
AU - Wiehler, Levke
AU - Heidenblut, Torsten
AU - Hack, Theo
AU - Engel, Christian
AU - Maier, Hans Jürgen
PY - 2021/2/15
Y1 - 2021/2/15
N2 - The mechanical response of a commercial aluminum alloy, AA7085, was examined using slow strain rate testing in dry air and humid air at 70 °C. These tests and fractographic observations confirmed that the alloy suffered from hydrogen embrittlement when exposed to humid air. Crack initiation was studied in both environments to evaluate the effect of humidity on crack nucleation. Observations from both slow strain rate tests and constant displacement tests were compared. Specimens from slow strain rate testing were examined after fracture while constant displacement testing allowed periodic observations of the sample surface. Based on these observations, a mechanism for the crack initiation in humidity has been proposed for AA7085 that does not involve substantial contribution from anodic dissolution.
AB - The mechanical response of a commercial aluminum alloy, AA7085, was examined using slow strain rate testing in dry air and humid air at 70 °C. These tests and fractographic observations confirmed that the alloy suffered from hydrogen embrittlement when exposed to humid air. Crack initiation was studied in both environments to evaluate the effect of humidity on crack nucleation. Observations from both slow strain rate tests and constant displacement tests were compared. Specimens from slow strain rate testing were examined after fracture while constant displacement testing allowed periodic observations of the sample surface. Based on these observations, a mechanism for the crack initiation in humidity has been proposed for AA7085 that does not involve substantial contribution from anodic dissolution.
KW - AA7085
KW - Constant displacement testing
KW - Crack initiation
KW - Humidity
KW - Hydrogen
KW - Slow strain rate testing
UR - http://www.scopus.com/inward/record.url?scp=85100145996&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2021.140776
DO - 10.1016/j.msea.2021.140776
M3 - Article
AN - SCOPUS:85100145996
VL - 804
JO - Materials Science and Engineering A
JF - Materials Science and Engineering A
SN - 0921-5093
M1 - 140776
ER -