A novel hot pack rolling of high Nb-TiAl sheet from cast ingot

Z. Z. Shen; J. P. Lin; Y. F. Liang; L. Q. Zhang; S. L. Shang; Z. K. Liu

doi:10.1016/j.intermet.2015.07.009

A novel hot pack rolling of high Nb-TiAl sheet from cast ingot

Z. Z. Shen, J. P. Lin, Y. F. Liang, L. Q. Zhang, S. L. Shang, Z. K. Liu

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

Abstract

High-Nb containing (6-10 at.%) TiAl alloys exhibit excellent high-temperature strength and oxidation resistance. However, they are difficult to be fabricated into sheet in comparison with the conventional TiAl alloys. In the present work, the hot-deformation behavior of a high Nb-TiAl alloy (Ti-45Al-8.5Nb-0.2W-0.2B-0.03Y) was investigated. Hot-rolling process was optimized and carried out directly from the PAM (Plasma Arc Melting) ingot without the hot isostatic pressing (HIP) and hot forging. The hot-rolled sheets were successfully manufactured with dimensions up to 360 mm × 100 mm × 3.5 mm. The microstructure of as-rolled sheet is a typical "near gamma" characteristic with an average grain size about 15 μm. In the view of breakdown the lamellar colonies of high Nb-TiAl alloy ingot, the direct hot-rolling process has advantage over hot can forging and extrusion. Moreover, mechanical properties at room and high temperatures were also tested. Noteworthily, the as-rolled high Nb-TiAl alloy shows superplasticity above 950°C at relatively high strain rate of 5 × 10^-4.

Original language	English (US)
Pages (from-to)	19-25
Number of pages	7
Journal	Intermetallics
Volume	67
DOIs	https://doi.org/10.1016/j.intermet.2015.07.009
State	Published - Aug 3 2015

All Science Journal Classification (ASJC) codes

General Chemistry
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.intermet.2015.07.009

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title = "A novel hot pack rolling of high Nb-TiAl sheet from cast ingot",

abstract = "High-Nb containing (6-10 at.%) TiAl alloys exhibit excellent high-temperature strength and oxidation resistance. However, they are difficult to be fabricated into sheet in comparison with the conventional TiAl alloys. In the present work, the hot-deformation behavior of a high Nb-TiAl alloy (Ti-45Al-8.5Nb-0.2W-0.2B-0.03Y) was investigated. Hot-rolling process was optimized and carried out directly from the PAM (Plasma Arc Melting) ingot without the hot isostatic pressing (HIP) and hot forging. The hot-rolled sheets were successfully manufactured with dimensions up to 360 mm × 100 mm × 3.5 mm. The microstructure of as-rolled sheet is a typical {"}near gamma{"} characteristic with an average grain size about 15 μm. In the view of breakdown the lamellar colonies of high Nb-TiAl alloy ingot, the direct hot-rolling process has advantage over hot can forging and extrusion. Moreover, mechanical properties at room and high temperatures were also tested. Noteworthily, the as-rolled high Nb-TiAl alloy shows superplasticity above 950°C at relatively high strain rate of 5 × 10-4.",

author = "Shen, {Z. Z.} and Lin, {J. P.} and Liang, {Y. F.} and Zhang, {L. Q.} and Shang, {S. L.} and Liu, {Z. K.}",

note = "Funding Information: The authors thank the National Basic Research Program of China (973 Program) for their ﬁnancial support under contract No. 2011CB605501 and The National Natural Science Foundation of China for their financial support under contract No. 51271016 . Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd. All rights reserved.",

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AU - Shen, Z. Z.

AU - Lin, J. P.

AU - Liang, Y. F.

AU - Zhang, L. Q.

AU - Shang, S. L.

AU - Liu, Z. K.

N1 - Funding Information: The authors thank the National Basic Research Program of China (973 Program) for their ﬁnancial support under contract No. 2011CB605501 and The National Natural Science Foundation of China for their financial support under contract No. 51271016 . Publisher Copyright: © 2015 Elsevier Ltd. All rights reserved.

PY - 2015/8/3

Y1 - 2015/8/3

N2 - High-Nb containing (6-10 at.%) TiAl alloys exhibit excellent high-temperature strength and oxidation resistance. However, they are difficult to be fabricated into sheet in comparison with the conventional TiAl alloys. In the present work, the hot-deformation behavior of a high Nb-TiAl alloy (Ti-45Al-8.5Nb-0.2W-0.2B-0.03Y) was investigated. Hot-rolling process was optimized and carried out directly from the PAM (Plasma Arc Melting) ingot without the hot isostatic pressing (HIP) and hot forging. The hot-rolled sheets were successfully manufactured with dimensions up to 360 mm × 100 mm × 3.5 mm. The microstructure of as-rolled sheet is a typical "near gamma" characteristic with an average grain size about 15 μm. In the view of breakdown the lamellar colonies of high Nb-TiAl alloy ingot, the direct hot-rolling process has advantage over hot can forging and extrusion. Moreover, mechanical properties at room and high temperatures were also tested. Noteworthily, the as-rolled high Nb-TiAl alloy shows superplasticity above 950°C at relatively high strain rate of 5 × 10-4.

AB - High-Nb containing (6-10 at.%) TiAl alloys exhibit excellent high-temperature strength and oxidation resistance. However, they are difficult to be fabricated into sheet in comparison with the conventional TiAl alloys. In the present work, the hot-deformation behavior of a high Nb-TiAl alloy (Ti-45Al-8.5Nb-0.2W-0.2B-0.03Y) was investigated. Hot-rolling process was optimized and carried out directly from the PAM (Plasma Arc Melting) ingot without the hot isostatic pressing (HIP) and hot forging. The hot-rolled sheets were successfully manufactured with dimensions up to 360 mm × 100 mm × 3.5 mm. The microstructure of as-rolled sheet is a typical "near gamma" characteristic with an average grain size about 15 μm. In the view of breakdown the lamellar colonies of high Nb-TiAl alloy ingot, the direct hot-rolling process has advantage over hot can forging and extrusion. Moreover, mechanical properties at room and high temperatures were also tested. Noteworthily, the as-rolled high Nb-TiAl alloy shows superplasticity above 950°C at relatively high strain rate of 5 × 10-4.

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A novel hot pack rolling of high Nb-TiAl sheet from cast ingot

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