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Net shape engineering for high performance aerospace applications: targeted development of novel technologies for aerospace near net shape combustor module applications

Clark, Daniel (2012)
Eng.D. thesis, University of Birmingham.

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Two additive processing scenarios were considered covering manufacturing and repair applications. One scenario required evaluation of three processes for the addition of shaped blocks to a casing. The other involved infilling a shallow hemispherical indent with one of three polycrystalline alloys (alloy 718, waspaloy™ and RR1000) using different deposition strategies. Processinduced discontinuities were characterised and controlled using a design of experiments approach.
As distinct from welding, process variables of overlap, Toolpath, bead shape,sequencing and incremental height were established as influential variables Toolpath in particular can give markedly different textures and grain alignment which would be expected to influence mechanical anisotropy. Fine pool processes seem less prone to cracking and more likely to yield fine microstructures.

Type of Work:Eng.D. thesis.
Supervisor(s):Wu, Xinhua and Bowen, Paul
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:Department of Metallurgy and Materials, Manufacturing Technology
Additional Information:

Embargo until: 31/12/2021

Publications resulting from research:

Clark, D., Whittaker, M.T. and Bache, M.R., 2012. Microstructural characterization of a prototype titanium alloy structure processed via direct laser deposition (DLD). Metallurgical and Materials Transactions B, 43(2), pp.388-396.

Clark, D., Sharples, S.D. and Wright, D.C., 2011. Development of online inspection for additive manufacturing products. Insight-Non-Destructive Testing and Condition Monitoring, 53(11), pp.610-613.

Clark, D., Bache, M.R. and Whittaker, M.T., 2010. Microstructural characterization of a polycrystalline nickel-based superalloy processed via tungsten-intert-gas-shaped metal deposition. Metallurgical and Materials Transactions B, 41(6), pp.1346-1353.

Clark, D., Bache, M.R. and Whittaker, M.T., 2008. Shaped metal deposition of a nickel alloy for aero engine applications. Journal of Materials Processing Technology, 203(1), pp.439-448.

Wang, F., Wu, X.H. and Clark, D., 2011. On direct laser deposited Hastelloy X: dimension, surface finish, microstructure and mechanical properties. Materials Science and Technology, 27(1), pp.344-356.

Subjects:TN Mining engineering. Metallurgy
TS Manufactures
Institution:University of Birmingham
ID Code:7200
This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder.
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