B. Poole A. Marsh D. Lunt C. Hardie M. Gorley C. Hamelin A. Harte
The high source stability and brightness of field emission gun equipped scanning electron microscopes (SEM) makes them ideal for high-resolution digital image correlation (HRDIC). However, their high initial capital cost can be prohibitive for research organisations and groups. Conventional thermionic SEMs using either a tungsten hairpin or LaB
Preprint PublishedB. Poole A. Marsh D. Lunt C. Hardie M. Gorley C. Hamelin A. Harte
Scanning electron microscopy-based is now an established technique, providing full-field strain and displacement measurement at the microscale. Techniques for generating speckle patterns for sub-micron strain mapping are highly substrate dependent but typically rely on applying aggressive conditions which may alter the microstructure of interest…
Preprint PublishedD. Lunt R. Thomas D. Bowden M. T. P. Rigby-Bell S. de Moraes Shubeita C. Andrews T. Lapauw J. Vleugels J. Quinta da Fonseca K. Lambrinou P. Frankel
Materials subjected to irradiation damage often undergo local changes in the microstructure that effect the expected performance. To investigate those changes, this work proposes a novel approach to detect strain localisation caused by irradiation-induced damage in nuclear materials on the microstructural level, conside…
PublishedR. Thomas D. Bowden D. Lunt D. Stewart M. Preuss
Hard-facing alloys in nuclear applications must remain resistant to deformation and wear, whilst also minimising transmutation to problematic elements during service. To this end, the Fe-based alloy RR2450 has been developed to potentially replace Co-based hard-facing alloys. RR2450 is a complex multi-phase stainless steel alloy showing an unusuall…
PreprintS. Omole A. J. G. Lunt S. Kirk A. Shokrania
The high ductile-to-brittle transition temperature (DBTT) of tungsten combined with its high hardness make machining incredibly difficult. These properties typically result in the poor-quality machined surfaces and short tool life. In this study, TiAlN coated carbide tools with different rake angles (8°, 10° and 12°) were tested in convention…
PreprintMia Maric Rhys Thomas Tamas Ungar Gyula Zilahi Callum Hunt David Lunt Jack Donoghue Kieran Lynch Philipp Frankel Pierre Barberis Florent Bourlier Michael Preuss Pratheek Shanthraj
Hydride precipitation and reorientation has the potential to embrittle zirconium alloys. This study aims to better understand the influence of the Zr microstructure on hydride precipitation and reorientation. Specifically, the crystallography, phase stability and morphology of hydride precipitation was correlated to microstructural variations due t…
Preprint PurchaseM. Fulvio L. Aho-Mantila R. Ambrosino T. Body H. Bufferand G. Calabro’ G. Ciraolo D. Coster G. Di Gironimo P. Fanelli N. Fedorczak A. Herrmann P. Innocente R. Kembleton T. Lunt D. Marzullo S. Merriman D. Moulton A. Nielsen J. Omotani G. Ramogida H. Reimerdes M. Reinhart P. Ricci F. Riva A. Stegmeir F. Subba W. Suttrop P. Tamain M. Teschke A. Thrysoe W. Treutterer S. Varoutis M. Wensing M. Wischmeier l. Y. Xiang J. Lilburne A. Wilde
A comparison between different alternative divertor configurations, in terms of benefits and additional complexity is carried out for the European DEMO. A synergetic approach between different aspects of the problem, including physics and engineering, provides new insight on the capabilities of the new divertors to handle the exhausted power wit…
PreprintL. Xiang F. Militello D. Moulton F. Subba L. Aho-Mantila D. Coster M. Wensing T. Lunt M. Wischmeier H. Reimerdes
The SOLPS-ITER simulations of European DEMO reactor, with 450 MW of power to be exhausted, show an increased operational space compared to the conventional single-null configuration. Using a reduced model with fluid neutrals and bundled impurities, we assessed the existence and the boundaries of operational space for DEMO with the conventional sing…
Preprint PublishedF. Militello L. Aho-Mantila R. Ambrosino T. Body H. Bufferand G. Calabro’ G. Ciraolo D. Coster G. Di Gironimo P. Fanelli N. Fedorczak A. Herrmann P. Innocente R. Kembleton J. Lilburne T. Lunt D. Marzullo S. Merriman D. Moulton A. Nielsen J. Omotani G. Ramogida H. Reimerdes M. Reinhart P. Ricci F. Riva A. Stegmeir F. Subba W. Suttrop P. Tamain M. Teschke A. Thrysoe W. Treutterer S. Varoutis M. Wensing A. Wilde M. Wischmeier L.Y. Xiang
A thorough physics and engineering analysis of alternative divertor configurations is carried out by examining benefits and problems by comparing the baseline single null solution with a Snowflake, an X- and a Super-X divertor. It is observed that alternative configurations can provide margin and resilience against large power fluctuations, but the…
Preprint PurchaseAlbert D. Smith Jack M. Donoghue Alistair J.W. Garner David Lunt Allan Harte Keith Wilford Philip J. Withers Michael Preuss
Proton irradiation is often used as a proxy for neutron irradiation but the irradiated layer is typically
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