TY - JOUR
T1 - Effect of precipitate coherency on the corrosion-induced hydrogen trapping in 2024 aluminum alloy
AU - Kamoutsi, H.
AU - Chaidemenopoulos, Grigorios
AU - Mavros, H.
AU - Karantonidis, C.
AU - Floratos, P.
AU - Alhosani, Z.
AU - Cho, P.
AU - Anjum, D. H.
AU - Ravaux, F.
AU - Polychronopoulou, K.
N1 - Funding Information:
Part of this work was funded by Khalifa University , Abu Dhabi, UAE, with an internal start-up fund under the project No. 847400013 on Hydrogen Embrittlement of Aluminum Alloys. TEM work in this paper was completed through the funds provided by Abu Dhabi Award for Research Excellence 2019 round (AARE-2019) under the Project No. AARE19-131.
Publisher Copyright:
© 2021 Hydrogen Energy Publications LLC
PY - 2021/10/6
Y1 - 2021/10/6
N2 - Hydrogen trapping is one of the factors leading to hydrogen embrittlement in heat-treatable high-strength aluminum alloys. The effect of coherency of precipitates on the corrosion-induced hydrogen trapping in aluminum alloy 2024 was investigated by performing artificial aging treatments before corrosion exposure. Two aging temperatures were employed, 170 and 210 °C, for aging times spanning the underaged, peak-aged and overaged conditions. Hydrogen uptake was induced by exfoliation corrosion. Hydrogen evolution from trapping sites was followed by thermal desorption spectroscopy. High resolution transmission electron microscopy combined with geometric phase analysis was performed to analyze the coherency of the precipitates. The results indicated that the coherency state between precipitates and the matrix plays an important role in hydrogen trapping. Hydrogen evolving at 300 °C (T2 state) corresponds to hydrogen trapped by the stress fields of coherent GPB zones and S΄΄ (Al10Cu3Mg3) phases, which form at aging temperatures, below the corresponding solvus temperature.
AB - Hydrogen trapping is one of the factors leading to hydrogen embrittlement in heat-treatable high-strength aluminum alloys. The effect of coherency of precipitates on the corrosion-induced hydrogen trapping in aluminum alloy 2024 was investigated by performing artificial aging treatments before corrosion exposure. Two aging temperatures were employed, 170 and 210 °C, for aging times spanning the underaged, peak-aged and overaged conditions. Hydrogen uptake was induced by exfoliation corrosion. Hydrogen evolution from trapping sites was followed by thermal desorption spectroscopy. High resolution transmission electron microscopy combined with geometric phase analysis was performed to analyze the coherency of the precipitates. The results indicated that the coherency state between precipitates and the matrix plays an important role in hydrogen trapping. Hydrogen evolving at 300 °C (T2 state) corresponds to hydrogen trapped by the stress fields of coherent GPB zones and S΄΄ (Al10Cu3Mg3) phases, which form at aging temperatures, below the corresponding solvus temperature.
KW - 2024 alloy
KW - Aging treatment
KW - Coherent precipitates
KW - Corrosion
KW - Hydrogen trapping
UR - http://www.scopus.com/inward/record.url?scp=85113397235&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2021.08.005
DO - 10.1016/j.ijhydene.2021.08.005
M3 - Article
AN - SCOPUS:85113397235
SN - 0360-3199
VL - 46
SP - 34487
EP - 34497
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 69
ER -
