Zakaria Abdallah
Swansea University
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Publication
Featured researches published by Zakaria Abdallah.
Materials | 2014
Zakaria Abdallah; Veronica Gray; M.T. Whittaker; Karen Perkins
The deformation of structural alloys presents problems for power plants and aerospace applications due to the demand for elevated temperatures for higher efficiencies and reductions in greenhouse gas emissions. The materials used in such applications experience harsh environments which may lead to deformation and failure of critical components. To avoid such catastrophic failures and also increase efficiency, future designs must utilise novel/improved alloy systems with enhanced temperature capability. In recognising this issue, a detailed understanding of creep is essential for the success of these designs by ensuring components do not experience excessive deformation which may ultimately lead to failure. To achieve this, a variety of parametric methods have been developed to quantify creep and creep fracture in high temperature applications. This study reviews a number of well-known traditionally employed creep lifing methods with some more recent approaches also included. The first section of this paper focuses on predicting the long-term creep rupture properties which is an area of interest for the power generation sector. The second section looks at pre-defined strains and the re-production of full creep curves based on available data which is pertinent to the aerospace industry where components are replaced before failure.
Materials | 2014
Will Harrison; Zakaria Abdallah; M.T. Whittaker
Gamma titanium aluminides (γ-TiAl) display significantly improved high temperature mechanical properties over conventional titanium alloys. Due to their low densities, these alloys are increasingly becoming strong candidates to replace nickel-base superalloys in future gas turbine aeroengine components. To determine the safe operating life of such components, a good understanding of their creep properties is essential. Of particular importance to gas turbine component design is the ability to accurately predict the rate of accumulation of creep strain to ensure that excessive deformation does not occur during the component’s service life and to quantify the effects of creep on fatigue life. The theta (θ) projection technique is an illustrative example of a creep curve method which has, in this paper, been utilised to accurately represent the creep behaviour of the γ-TiAl alloy Ti -45Al-2Mn-2Nb. Furthermore, a continuum damage approach based on the θ-projection method has also been used to represent tertiary creep damage and accurately predict creep rupture.
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 2012
Zakaria Abdallah; Karen Perkins; S. Williams
Intermetallics | 2013
Zakaria Abdallah; M.T. Whittaker; M.R. Bache
Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science | 2012
Zakaria Abdallah; Karen Perkins; Steve Williams
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 2016
Zakaria Abdallah; Rengen Ding; Nigel Martin; Mark Dixon; M.R. Bache
Structural and Multidisciplinary Optimization | 2018
Nada Aldoumani; Hamed Haddad Khodaparast; Cinzia Giannetti; Zakaria Abdallah; Ian Cameron; Michael I. Friswell; Johann Sienz
Archive | 2018
Zakaria Abdallah; Karen Perkins; Cris Arnold
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 2016
Zakaria Abdallah; Rengen Ding; Nigel Martin; Mark Dixon; M.R. Bache
School of Chemistry, Physics & Mechanical Engineering; Science & Engineering Faculty | 2014
Zakaria Abdallah; Veronica Gray; M.T. Whittaker; Karen Perkins