Structure of perovskite carbide and nitride precipitates in L1<sub>0</sub>-ordered TiAl

Tian, Wenhuai; Sano, Takeshi; Nemoto, Minoru

doi:10.1080/01418619308219379

Cited by 57 publications

(22 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The suffix P denotes the precipitate of the perovskite type structure, Pphase, and TiAl denotes the matrix. This type of perovskite precipitates has a long range order structure in carbon doped TiAl and the detailed crystal structure has been reported by the present authors [9][10][11].…”

Section: Precipitation Of Ti 3 Aln In Tialmentioning

confidence: 58%

“…In the case of TiAl doped with carbon, Ti 3 AlC precipitates formed during aging exhibit a similar needle like shape with the long axis parallel to [001] direction of the TiAl matrix, but the cross section viewed along [001] of TiAl matrix takes a cubic shape [9,10]. In present study, the Ti 3 AlN precipitates actually exhibit a lenticular shape with their broad face parallel to (100) of the matrix for variant A and (010) for variant B as shown in Fig.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Precipitation behavior of nitrides in L10-ordered TiAl

Tian

Nemoto

2005

Intermetallics

Self Cite

View full text Add to dashboard Cite

Section: Precipitation Of Ti 3 Aln In Tialmentioning

confidence: 58%

Section: Discussionmentioning

confidence: 99%

Precipitation behavior of nitrides in L10-ordered TiAl

Tian

Nemoto

2005

Intermetallics

Self Cite

View full text Add to dashboard Cite

“…[20,[42][43][44][45][46] The strengthening effect critically depends on the size and the dispersion of the particles. In this respect, carbides, nitrides, and silicides appear to be beneficial as the optimum dispersion can be achieved by homogenization and aging procedures.…”

Section: B Precipitation Hardeningmentioning

confidence: 99%

Creep behavior of TiAl alloys with enhanced high-temperature capability

Appel

Paul

Oehring

et al. 2003

Metall Mater Trans A

View full text Add to dashboard Cite

For high-temperature applications, creep strength is of major concern, in addition to oxidation and corrosion resistance, and determines the application range of titanium aluminide alloys in competition with other structural materials. Thus, this work was aimed at identifying mechanisms of creep deformation and microstructural degradation and at developing alloying concepts with respect to an enhanced high-temperature capability. The analysis shows that dislocation climb controls deformation in the range of the intended operation temperatures. Further, complex processes of phase transformations, recrystallization, and microstructural coarsening were observed, which contribute to microstructural degradation and limit component life in long-term service. By alloying with high contents of Nb, both room-and high-temperature strength properties can be improved as Nb increases the activation energy of diffusion and increases the propensity for twinning at ambient temperature. For alloys with enhanced hightemperature capability, microalloying with carbon is also of particular use, because carbide precipitates effectively hinder dislocation motion and are thought to increase microstructural stability.

show abstract

“…At higher carbon contents a more carbon rich hexagonal H-type Ti 2 AlC carbide variant is formed which exists as coarser particles at grain boundaries [10] and is not as efficient in hardening the material compared to P-type carbides [4]. Up to now most of the available studies were performed on alloys with rather high aluminium content and limited additions of ternary or quaternary alloying elements (2 at% or below) [7e9, 11,12]. From a technological point of view up-coming alloys differ strongly from these, being lower in aluminium and having ternary or quaternary alloying additions of up to 8 at% niobium and other b-stabilizing elements.…”

Section: Introductionmentioning

confidence: 99%