The effect of nickel on the martensitic-type transformations of Pt3Al and PtTi

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dc.contributor.author Biggs, Taryn en_US
dc.contributor.author Cornish, Lesley en_US
dc.contributor.author Witcomb, Michael en_US
dc.contributor.author Cortie, Michael en_US
dc.contributor.editor en_US
dc.date.accessioned 2010-05-28T09:49:31Z
dc.date.available 2010-05-28T09:49:31Z
dc.date.issued 2001 en_US
dc.identifier 2006007346 en_US
dc.identifier.citation Biggs Taryn et al. 2001, 'The effect of nickel on the martensitic-type transformations of Pt3Al and PtTi', EDP Sciences, vol. 11, no. Pr8, pp. 493-498. en_US
dc.identifier.issn 1155-4339 en_US
dc.identifier.other C1UNSUBMIT en_US
dc.identifier.uri http://hdl.handle.net/10453/9423
dc.description.abstract The effect of nickel on two classes of martensitic-type transformations in platinum systems has been studied. The first transformation is Ll[2] to DO[c]' in the Pt3Al system and the second is B2 to B 19 in the TiPt system. The microstructures after transformation in the two systems are very different. The product of the Pt[3]Al transformation has a twinned microstructure, typical of cubic-to-tetragonal transformations. The product of the TiPt transformation is lath-like, although the morphology can be altered using heat treatments. The parent phase in the TiPt system is not retained at room temperature, whereas the parent phase in the Pt[3]Al transformation can be stabilised to room temperature. A great variation in hardness and transformation temperature is seen in each system as the composition is varied about the stoichiometric ratio, which has the lowest hardness. The Pt[3]Al transformation temperature has been reported to range from around room temperature to 1000?C. The TiPt transformation temperature can range from 1000 to 1080?C. The effect of nickel additions on these alloys also has a marked effect on the parent and product phase stability, and hence the microstructure and resulting hardness. The effect on the Pt[3]Al phase is complex, as nickel appears to stabilise the parent phase. The hardness varied in the region of 350 to 500 HV[10]. For the TiPt phase, the hardness values were generally found to increase with the nickel additions increasing from 250 to about 600 HV[10]. The addition of 20 at.% nickel decreases the transformation temperature from around 1000?C to about 600?C. en_US
dc.language en_US
dc.publisher EDP Sciences en_US
dc.relation.isbasedon en_US
dc.relation.isbasedon http://dx.doi.org/10.1051/jp4:2001882 en_US
dc.title The effect of nickel on the martensitic-type transformations of Pt3Al and PtTi en_US
dc.parent Journal de Physique IV France en_US
dc.journal.volume 11 en_US
dc.journal.number Pr8 en_US
dc.publocation France en_US
dc.identifier.startpage 493 en_US
dc.identifier.endpage 498 en_US
dc.cauo.name SCI.Physics and Advanced Materials en_US
dc.conference Verified OK en_US
dc.for 100700 en_US
dc.personcode 0000021854 en_US
dc.personcode 0000020171 en_US
dc.personcode 0000021855 en_US
dc.personcode 020302 en_US
dc.percentage 40 en_US
dc.classification.name Nanotechnology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords Transition element alloys ; Experimental study ; Binary alloys ; Titanium alloys ; Aluminium alloys ; Platinum alloys ; Scanning electron microscopy ; Optical microscopy ; Phase diagrams ; Temperature dependence ; Hardness ; Heat treatments ; Twinning ; Microstructure ; Martensitic transformations ; en_US
dc.staffid 020302 en_US


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