Influence of Hydrogen on Fatigue Crack Growth in 7075 Aluminum Alloy

Dey, Swapna and Sivaprasad, S and Das, N and Chattoraj, I (2022) Influence of Hydrogen on Fatigue Crack Growth in 7075 Aluminum Alloy. Journal of Materials Engineering and Performance .

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Fatigue crack growth (FCG) behavior of 7075 T6 aluminum alloy was studied using constant stress intensity factor range (Delta K) envelopes in air and hydrogenating environments. The effects of loading frequency, stress ratio, and Delta K on FCG behavior were studied in the hydrogenating environment. The overall FCG rate was found to be significantly greater in hydrogenated specimens compared to that in air due to the hydrogen embrittlement effect which was observed through faceted surfaces, quasi-cleavage features, and secondary cracks. The influence of hydrogen observed through normalized crack growth rate revealed that crack growth was inversely proportional to Delta K. However, the frequency effect on FCG was found to be anomalous and ambiguous for hydrogenated specimens with no specific trend.

Item Type:Article
Official URL/DOI:https://10.1007/s11665-022-07119-2
Uncontrolled Keywords:Aluminum alloy, fatigue crack growth, fracture, hydrogen, embrittlement, propagation behaviour, microstructure, frequency, environment, embrittlement, mechanisms, Ration
Divisions:Material Science and Technology
ID Code:9288
Deposited By:Dr Mita Tarafder
Deposited On:21 Oct 2022 10:49
Last Modified:21 Oct 2022 10:49
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