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PhD Position at University of Manchester - model ... (No replies)
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Understanding the Role of Hydrogen in 7xxx Aluminium Alloys Through Atomistic Simulation
Hydrogen embrittlement of high strength AA7xxx (Al-Zn-Mg-Cu) alloys can cause premature in-service cracking. This longstanding problem has received renewed attention due to the apparently increased susceptibility to this problem in certain recently developed AA7xxx alloys. The mechanism for hydrogen embrittlement in these materials remains controversial, and there is no clear understanding of the link between alloy chemistry, microstructure, loading, environment, and potential for hydrogen assisted cracking. A key issue is that atomic hydrogen inside the metal cannot be imaged directly, and so its location in the microstructure is unclear. Therefore, whilst it is expected that features such as grain boundaries, precipitate interfaces, and dislocations can all act as trapping sites, the potency of these traps and their significance is unknown.
This PhD project aims to overcome these experimental difficulties by using atomistic modelling to predict the potency of potential trapping sites and identify the likely role of trapped hydrogen on the local material behaviour. Models will be validated against experimental measurements using designed microstructures developed to emphasise particular candidate trapping sites. This understanding will be used to identify the features of a high strength 7xxx alloy that are likely to make it susceptible to hydrogen embrittlement, and to propose strategies to mitigate this problem.
The PhD student will be based at the University of Manchester and will be part of the Advanced Metallic Systems CDT. The project will be undertaken in collaboration with Airbus, a leading manufacturer of civil aircraft. The student will be given the opportunity to spend time within the company, to attend regular meetings with their technical experts, as well as to gain an understanding of the wider operation.
The four-year studentship is available to EU nationals only and includes tuition fees and a minimum stipend of £16,553pa, including support from Airbus. The project start date is September 2017.
For further details or to apply, please see:
https://www.findaphd.com/search/ProjectDetails.aspx?PJID=55707&LID=1034
Enquiries should be directed to either Professor Joseph Robson ([email protected]) or Dr Chris Race ([email protected]).