Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/8722
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dc.contributor.authorOmar, M. Z.-
dc.contributor.authorPalmiere, E. J.-
dc.contributor.authorHowe, A. A.-
dc.contributor.authorAtkinson, Helen V.-
dc.contributor.authorKapranos, P.-
dc.date.accessioned2010-11-04T15:18:39Z-
dc.date.available2010-11-04T15:18:39Z-
dc.date.issued2005-03-25-
dc.identifier.citationMaterials Science and Engineering A, 2005, 395, pp. 53-61en_GB
dc.identifier.issn0921-5093-
dc.identifier.urihttp://www.sciencedirect.com/science/article/pii/S0921509304014315en_GB
dc.identifier.urihttp://hdl.handle.net/2381/8722-
dc.description.abstractThixoforming is a forming process that shapes metal components in their semisolid state. Prior to forming, the microstructure of the alloy consists preferably of solid metal spheroids in a liquid matrix, which can be difficult to achieve with hot-worked, high alloy steels prone to strong microsegregation bands. A high performance HP9/4/30 steel has been assessed for thixoformability through a direct remelting route. Partial remelting was carried out between 1430 and 1470°C. Liquation occurred initially at grain boundaries, then also along the segregation bands. With increasing time and hold temperature, these “columns” broke down into shorter, more equiaxed segments, offering more chance of being thixoformed. Successful thixoforming producing net-shape demonstrator parts was achieved at processing temperatures in the range of 1470 – 1480°C, which corresponds to approximately 50 to 80% liquid (based on Differential Thermal Analysis). A thin solid skin, formed on the surface of the slug as a result of heat loss, had prevented the slug from collapsing. The resulting thixoformed products are discussed in relation to their load-displacement signals.en_GB
dc.language.isoenen_GB
dc.publisherElsevieren_GB
dc.rightsThis is the author’s final draft of the paper published as Materials Science and Engineering A, 2005, 395, pp. 53-61. The final published version is available at http://www.sciencedirect.com/science/journal/09215093, Doi: 10.1016/j.msea.2004.12.013-
dc.subjectThixoformingen_GB
dc.subjectMicrosegregationen_GB
dc.subjectDirect remelting routeen_GB
dc.subjectPartial remeltingen_GB
dc.titleThixoforming of a high performance HP9/4/30 steelen_GB
dc.typeArticleen_GB
dc.identifier.doi10.1016/j.msea.2004.12.013-
Appears in Collections:Published Articles, Dept. of Engineering

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