Microstructure of titanium aluminide prepared by centrifugal investment casting for automotive turbocharger
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
From a technical perspective, many of the unique properties of titanium aluminides that make them attractive for hightemperaturestructural applications also make the processing of these alloys into useful products challenging. Cast titaniumaluminide (TiAl) is on the verge of commercialization, particularly in the vehicle industry, owing to its low production cost. In this study, the centrifugal castability of a TiAl (Ti-47%Al, mole fraction) turbocharger was investigated by simulation. Actual casting was carried out in vacuum using an induction melting furnace coupled to an Al2O3 crucible. Experimentalverification indicated that the numerical simulation results were in agreement with the experimental results. The crystalstructure, microstructure, and chemical composition of the TiAl prepared by centrifugal casting were studied by X-raydiffractometry, optical microscopy, field emission scanning electron microscopy (FE-SEM) and energy dispersive spectroscopy(EDS). The FE-SEM and EDS examinations of the TiAl casting showed that the thickness of the oxide layer (α-case) wastypically less than 30 μm.
Abstract
From a technical perspective, many of the unique properties of titanium aluminides that make them attractive for hightemperaturestructural applications also make the processing of these alloys into useful products challenging. Cast titaniumaluminide (TiAl) is on the verge of commercialization, particularly in the vehicle industry, owing to its low production cost. In this study, the centrifugal castability of a TiAl (Ti-47%Al, mole fraction) turbocharger was investigated by simulation. Actual casting was carried out in vacuum using an induction melting furnace coupled to an Al2O3 crucible. Experimentalverification indicated that the numerical simulation results were in agreement with the experimental results. The crystalstructure, microstructure, and chemical composition of the TiAl prepared by centrifugal casting were studied by X-raydiffractometry, optical microscopy, field emission scanning electron microscopy (FE-SEM) and energy dispersive spectroscopy(EDS). The FE-SEM and EDS examinations of the TiAl casting showed that the thickness of the oxide layer (α-case) wastypically less than 30 μm.
참고문헌 (22)
- T. Noda, , Intermetallics, 6, pp.709~713 (1998)
- Y.W. Kim, , J. Met, 46, pp.30~39 (1994)
- R.V. Ramanujan, , Int. Mater. Rev, 45(6), pp.217~240 (2000)
- K. Clemens, , Adv. Eng. Mater, 2(9), pp.551~570 (2000)
- R.M. Imayev, , Intermetallics, 15, pp.451~460 (2007)
- T. Tetsui, , Mater. Sci. Eng. A, 329-331, pp.582~588 (2002)
- H. Clemens, , Adv. Eng. Mater, 15, pp.191~215 (2013)
- J. Soyama, , Mater. Des, 84, pp.87~94 (2015)
- J.D.H. Paul, , Intermetallics, 32, pp.318~328 (2013)
- T.I. Nazarova, , Intermetallics, 82, pp.26~31 (2017)
- P.X. Fu, , Intermetallics, 16, pp.130~138 (2008)
- B.H. Hu, , J. Mater. Process. Technol, 105, pp.128~133 (2000)
- D.Z. Li, , J. Mater. Process. Technol, 148, pp.310~316 (2004)
- G.F. Mi, , J. Iron Steel Res. Int, 16(4), pp.12~17 (2009)
- L. Yang, , Intermetallics, 66, pp.149~155 (2015)
- S-Y. Sung, , Intermetallics, 15, pp.468~474 (2007)
- J.Y. Jung, , Intermetallics, 7, pp.1033~1041 (1999)
- M.T. Jovanović, , Mater. Des, 27, pp.192~199 (2006)
- H.Z. Niu, , Intermetallics, 31, pp.225~231 (2012)
- T. Tetsui, , Intermetallics, 31, pp.274~281 (2012)
- S. Pattnaik, , J. Mater. Process. Technol, 212(11), pp.2332~2348
- X. Chamorro, , J. Mater. Process. Technol, 243, pp.75~81 (2017)