Library Services do not keep undergraduate or masters dissertations for any of the subject areas. You may find that your degree programme provides example projects / dissertations via Blackboard. Please speak to your School Support Office to find out more.
ABS Postgraduate Students can find a few example projects at the end of the journals collection on the first floor of the Library. You can borrow these projects for 1 week.
If you are looking for PhD theses you can find information at https://libanswers.aston.ac.uk/faq/25909