Centrifugal precision cast TiAl turbocharger wheel using ceramic mold

Wang, Shouren; Guo, Pengran; Yang, Liting

doi:10.1016/j.jmatprotec.2008.01.062

Cited by 38 publications

(13 citation statements)

References 23 publications

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“…In every sample the lamellar dendritic constituent was richer in titanium and the interdendritic g phase had higher aluminium content, which agrees with the available references [3,8,15]. Every sample revealed a slight contamination with Ca that dissolved in both microconstituents, although a little more in the interdendritic g phase.…”

Section: Chemical Compositionsupporting

confidence: 87%

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Induction melting of γ-TiAl in CaO crucibles

Gomes¹,

Barbosa²,

Ribeiro³

2008

Intermetallics

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a b s t r a c tIn this work a Ti-48Al alloy was induction melted in a CaO crucible using different superheating temperatures. In the first stage, samples were allowed to cool to room temperature inside the crucibles, in order to simulate a low cooling rate, and in the second stage samples were centrifugally poured into a steel mould, in order to study the effect of the melting operation on the alloy contamination with oxygen. The effect of superheating temperature on the metal-crucible interaction, alloy chemical composition, microstructure and microhardness is evaluated. The CaO crucible was found to be slightly dissolved by the molten alloy and the extent of that dissolution depends on the superheating temperature. A relationship was found between oxygen concentration and microhardness profiles of the a 2 þ g microconstituent, from the surface to the inside of samples, which depends on the superheating temperature and cooling rate.

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Section: Chemical Compositionsupporting

confidence: 87%

“…Nevertheless, significant improvements are being made to improve the mechanical performance of these alloys, with the development of new ternary and quaternary TiAl-based alloys, namely those from the systems TiAl-Nb-Cr and Ti-Al-W-Si [6,8]. To decrease production costs it is imperative to improve the actual processing techniques of TiAl.…”

Section: Introductionmentioning

confidence: 99%

Induction melting of γ-TiAl in CaO crucibles

Gomes¹,

Barbosa²,

Ribeiro³

2008

Intermetallics

View full text Add to dashboard Cite

show abstract

“…Investment casting of TiAl-based alloys represents promising technology for production of complex shaped parts for automotive and aero-engine industry [1,2]. However, casting of large components such as gas turbine blades leads to highly inhomogeneous microstructures composed of columnar and equiaxed grains.…”

Section: Introductionmentioning

confidence: 99%

Solidification behaviour of TiAl-based alloys studied by directional solidification technique

2011

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“…Cast TiAl-based alloys are attractive for high-temperature structural applications due to their high specific strength at elevated temperatures and acceptable price/properties ratio when compared to counterparts from Ni-based superalloys [1,2]. However, the formation of coarse-grained microstructures during solidification [3] and significant chemical inhomogeneities of the TiAl-based castings [4] deteriorate the already low ductility and poor damage tolerance at ambient temperature.…”

Section: Introductionmentioning

confidence: 99%