In situ observation and neutron diffraction of NiTi powder sintering

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dc.contributor.authorChen, Gen_AU
dc.contributor.authorLiss, KDen_AU
dc.contributor.authorCao, Pen_AU
dc.date.accessioned2016-06-23T01:17:51Zen_AU
dc.date.available2016-06-23T01:17:51Zen_AU
dc.date.issued2014-04-01en_AU
dc.date.statistics2016-06-23en_AU
dc.description.abstractThis study investigated NiTi powder sintering behaviour from elemental powder mixtures of Ni/Ti and Ni/TiH2 using in situ neutron diffraction and in situ scanning electron microscopy. The sintered porous alloys have open porosities ranging from 2.7% to 36.0%. In comparison to the Ni/Ti compact, dehydrogenation occurring in the Ni/TiH2 compact leads to less densification yet higher chemical homogenization only after high-temperature sintering. For the first time, direct evidence of the eutectoid phase transformation of NiTi at 620 °C is reported by in situ neutron diffraction. A comparative study of cyclic stress–strain behaviours of the porous NiTi alloys made from Ni/Ti and Ni/TiH2 compacts indicate that the samples sintered from the Ni/TiH2 compact exhibited a much higher porosity, larger pore size, lower fracture strength, lower close-to-overall porosity ratio and lower Young’s modulus. Instead of enhanced densification by the use of TiH2 as reported in the literature, this study shows an adverse effect of TiH2 on powder densification in NiTi.© 2013 Acta Materialia Inc.en_AU
dc.identifier.citationChen, G., Liss, K.-D., & Cao, P. (2014). In situ observation and neutron diffraction of NiTi powder sintering. Acta Materialia, 67(0), 32-44. doi:10.1016/j.actamat.2013.12.013en_AU
dc.identifier.govdoc6739en_AU
dc.identifier.issn1359-6454en_AU
dc.identifier.journaltitleActa Materialiaen_AU
dc.identifier.pagination32-44en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.actamat.2013.12.013en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/7060en_AU
dc.identifier.volume67en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectAlloysen_AU
dc.subjectPorous materialsen_AU
dc.subjectSinteringen_AU
dc.subjectElectron microscopyen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectShape memory effecten_AU
dc.subjectDesorptionen_AU
dc.titleIn situ observation and neutron diffraction of NiTi powder sinteringen_AU
dc.typeJournal Articleen_AU
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