Effect of spark plasma sintering temperature on microstructure and mechanical properties of an ultrafine grained TiAl intermetallic alloy
dc.contributor.author | Chen, Yuyong | |
dc.contributor.author | Yu, H.B. | |
dc.contributor.author | Zhang, Deliang | |
dc.contributor.author | Chai, L.H. | |
dc.date.accessioned | 2010-07-12T03:27:39Z | |
dc.date.available | 2010-07-12T03:27:39Z | |
dc.date.issued | 2009 | |
dc.description.abstract | The effect of spark plasma sintering (SPS) temperature on the microstructure and mechanical properties of a bulk solid ultrafine grained gamma TiAl alloy produced by SPS of an ultrafine structured Ti/Al composite powder with a nominal composition of Ti–47 at.%Al has been investigated. The Ti/Al composite powder was produced using high energy mechanical milling. It was found that an SPS temperature of 800 °C led to the completion of the reactions needed for reaching the phase equilibrium and formation of a nanostructure with grain sizes in the range of 50–100 nm. However, this SPS temperature was not sufficient to achieve a nearly full density of the compact or a high level of interparticle bonding. Increasing the SPS temperature from 800 to 900 °C caused a significant increase of the density and the level of interparticle bonding while still maintaining grain sizes of <500 nm. The bulk TiAl alloy produced under this condition had a good compression yield strength, fracture strength, bending strength and plastic strain to fracture of 1722, 1963, 610 MPa and 4%, respectively. Increasing the SPS temperature from 900 to 1100 °C caused significant coarsening of the TiAl grains which led to a clear decrease in yield strength and hardness and a slight increase in ductility. | en_NZ |
dc.identifier.citation | Chen, Y.Y., Yu, H.B., Zhang, D. & Chai, L.H. (2009). Effect of spark plasma sintering temperature on microstructure and mechanical properties of an ultrafine grained TiAl intermetallic alloy. Materials Science and Engineering: A, 525(1-2), 166-173. | en_NZ |
dc.identifier.doi | 10.1016/j.msea.2009.06.056 | en_NZ |
dc.identifier.uri | https://hdl.handle.net/10289/4134 | |
dc.language.iso | en | |
dc.publisher | Elsevier | en_NZ |
dc.relation.isPartOf | Materials Science and Engineering A | en_NZ |
dc.subject | spark plasma sintering | en_NZ |
dc.subject | titanium aluminide | en_NZ |
dc.subject | ultrafine grained structure | en_NZ |
dc.subject | mechanical properties | en_NZ |
dc.subject | high energy mechanical milling | en_NZ |
dc.title | Effect of spark plasma sintering temperature on microstructure and mechanical properties of an ultrafine grained TiAl intermetallic alloy | en_NZ |
dc.type | Journal Article | en_NZ |
pubs.begin-page | 1 | en_NZ |
pubs.elements-id | 34324 | |
pubs.end-page | 8 | en_NZ |
pubs.issue | 1-2 | en_NZ |
pubs.volume | online | en_NZ |
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