dc.contributor.author |
Chen, G |
en |
dc.contributor.author |
Liss, K-D |
en |
dc.contributor.author |
Cao, Peng |
en |
dc.date.accessioned |
2015-05-15T00:08:51Z |
en |
dc.date.available |
2013-12-07 |
en |
dc.date.issued |
2014-04 |
en |
dc.identifier.citation |
Acta Materialia, 2014, 67 pp. 32 - 44 |
en |
dc.identifier.issn |
1359-6454 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/25522 |
en |
dc.description.abstract |
This 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. Published by Elsevier Ltd. All rights reserved. |
en |
dc.language |
eng |
en |
dc.publisher |
Elsevier |
en |
dc.relation.ispartofseries |
Acta Materialia |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/1359-6454/ http://www.elsevier.com/about/policies/author-agreement |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.subject |
Shape memory alloys |
en |
dc.subject |
Porous material |
en |
dc.subject |
Reactive sintering |
en |
dc.subject |
Mechanical behaviour |
en |
dc.subject |
Hydrogen desorption |
en |
dc.title |
In situ observation and neutron diffraction of NiTi powder sintering |
en |
dc.type |
Journal Article |
en |
dc.identifier.doi |
10.1016/j.actamat.2013.12.013 |
en |
pubs.begin-page |
32 |
en |
pubs.volume |
67 |
en |
dc.description.version |
AM - Accepted Manuscript |
en |
pubs.author-url |
http://www.sciencedirect.com/science/article/pii/S1359645413009488 |
en |
pubs.end-page |
44 |
en |
pubs.publication-status |
Published |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
Journal Article |
en |
pubs.subtype |
Article |
en |
pubs.elements-id |
427117 |
en |
pubs.org-id |
Engineering |
en |
pubs.org-id |
Chemical and Materials Eng |
en |
dc.identifier.pii |
S1359645413009488 |
en |
pubs.record-created-at-source-date |
2015-05-15 |
en |