Influence of cooling rate on microstructure formation during rapid solidification of binary TiAl alloys

Kenel, Christoph; Leinenbach, Christian

doi:10.1016/j.jallcom.2015.03.016

Cited by 77 publications

(48 citation statements)

References 22 publications

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“…The formation of γ m in surface chilling zone is reasonable due to the γ m that has been discovered by Kenel et al. in rapidly solidified binary TiAl alloys and ternary Ti‐Al‐(Nb, Mo) alloys . The results of EDS shown in Table suggest that the directional growth dendrites in Figure b are characterized by rich Al.…”

Section: Resultssupporting

confidence: 74%

“…However, to describe reasonably the cooling rate in our work, according to ref. [], the cooling rate of a thickness of 0.2 mm was calculated to be about 1.1 × 10 5 K s −1 .…”

Section: Resultsmentioning

confidence: 99%

“…The occurrence of phase selection in Al‐rich γ‐TiAl peritectic alloys tends to happen at rapid cooling. Kenel et al . reported that phase selection, characteristic microstructures, and massive transformation in binary Ti‐Al alloys and ternary Ti‐Al‐(Nb, Mo) alloys with different Al contents have been investigated using rapid solidification techniques.…”

Section: Introductionmentioning

confidence: 99%

“…Especially, based on previous experimental results and kinetic analysis at undercooled solidification, the formation of massive γ phase (γ m ) was considered by the solid‐state transformation α → γ m . Numerous investigations focus on the undercooled solidification of phase selection and heat treatments of massive transformation . While, the massive transformation and phase selection during chilling rapid solidification are rarely concerned.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and Metastable Phase in Rapidly Solidified TiAl Alloy Prepared by Vacuum Suction Casting

Liu

Shi

Yang

et al. 2019

Crystal Research and Technology

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Effect of the cooling rates on microstructure and metastable phase formation in Ti-50Al-2Cr-2Nb alloy is investigated by vacuum suction casting to realize rapid solidification by chilling Cu-mold. The temperature distribution field is simulated by the ANSYS software, and the cooling rates are calculated about 6.0 × 10 3 -2.2 × 10 4 K s −1 and 5.3 × 10 4 -6.0 × 10 4 K s −1 , respectively. The results show that phase selection and microstructural evolution are closely related to cooling rates. The transformation of primarily formed α phase into β phase from directional growth zone to the mushy zone determined by microstructural analysis at the cooling rate of 6.0 × 10 3 K s −1 , indicates the occurrence of phase selection and the formation of metastable phase. In addition, the occurrence of massive transformation in the surface chilling zone is generally different from that of heat treatment due to high cooling rates during suction casting.

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Section: Resultssupporting

confidence: 74%

“…However, to describe reasonably the cooling rate in our work, according to ref. [], the cooling rate of a thickness of 0.2 mm was calculated to be about 1.1 × 10 5 K s −1 .…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Microstructure and Metastable Phase in Rapidly Solidified TiAl Alloy Prepared by Vacuum Suction Casting

Liu

Shi

Yang

et al. 2019

Crystal Research and Technology

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“…Despite the fact that the actual cooling rates were not measured or recorded, the literature survey shows that at the bottom of the meniscus which is in contact with the watercooled copper base, the cooling rate can vary between 0.5 and 1 9 10 3 Ks À1 whereas at the center may drop down to 1 or 2 orders of magnitude (Ref [22][23][24]. The actual cooling rate, however, is affected by many factors as already commented in previous paragraphs.…”

Section: Methodsmentioning

confidence: 99%

Fabrication of TiC-Reinforced Composites by Vacuum Arc Melting: TiC Mode of Reprecipitation in Different Molten Metals and Alloys

Karantzalis

Arni

Tsirka

et al. 2016

J. of Materi Eng and Perform

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TiC crystals were developed and grown through a melt dissolution and reprecipitation mechanism, in different alloy matrices (pure Fe, 316L, Fe-22 at.%Al, Ni-25at.%Al, and pure Co) through the use of Vacuum Arc Melting (VAM) process. The TiC surfaces exhibit a characteristic faceted mode of growth which is explained in terms of classic nucleation and crystal growth theories and is related with the wellknown Jackson factor of crystal growth. Different morphologies of the finally solidified TiC grains are observed (dendritic, radially grown, isolated blocky crystals, particle clusters), the establishment of which may be most likely related with solidification progress, cooling rate, and melt compositional considerations. An initial, rough and qualitative phase identification shows a variety of compounds, and the attempts to define specific phase crystallographic-orientational relationships led to rather random results.

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Instrumentation for SAXS and SANS

2021

Small‐Angle Scattering

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Influence of cooling rate on microstructure formation during rapid solidification of binary TiAl alloys

Cited by 77 publications

References 22 publications

Microstructure and Metastable Phase in Rapidly Solidified TiAl Alloy Prepared by Vacuum Suction Casting

Microstructure and Metastable Phase in Rapidly Solidified TiAl Alloy Prepared by Vacuum Suction Casting

Fabrication of TiC-Reinforced Composites by Vacuum Arc Melting: TiC Mode of Reprecipitation in Different Molten Metals and Alloys

Instrumentation for SAXS and SANS

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