Packed forging and microstructure optimization of β-solidified TiAl alloy

Zhi Hai Deng; Jin Shan Li; Tie Bang Zhang; Hong Zhong; Hui Chang

doi:10.3969/j.issn.1007-2012.2012.02.009

Packed forging and microstructure optimization of β-solidified TiAl alloy

Zhi Hai Deng, Jin Shan Li, Tie Bang Zhang, Hong Zhong, Hui Chang

Northwestern Polytechnical University Xian

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

2 Scopus citations

Abstract

The displacement-load curves of Ti-43Al-5(Nb, Mo, B) alloy isothermally compressed at different strain rates and temperatures on Gleeble-1500D thermal-simulation machine were investigated. The results indicated that the load increased sharply first, and then kept constant, and finally increased again as the displacement increased continuously. A crack-free pancake was obtained when the ingot was packing forged at 1150°C and with strain rate of 0.1/s. The microstructure of the pancake consisted of major kinked/broken lamellae and dynamic recrystallization grains, minor residual β phase and remnant lamellae. After annealed at 1180°C for 5 hours, a homogeneous microstructure with fine and equiaxed grains was obtained. With elimination of the residual β phase, the uniformity of the microstructure was greatly improved as well.

Original language	English
Pages (from-to)	43-48
Number of pages	6
Journal	Suxing Gongcheng Xuebao/Journal of Plasticity Engineering
Volume	19
Issue number	2
DOIs	https://doi.org/10.3969/j.issn.1007-2012.2012.02.009
State	Published - Apr 2012
Externally published	Yes

Keywords

Homogeneity of microstructure
Hot deformation behavior
Isothermal compression
Packed forging
β phase

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10.3969/j.issn.1007-2012.2012.02.009

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title = "Packed forging and microstructure optimization of β-solidified TiAl alloy",

abstract = "The displacement-load curves of Ti-43Al-5(Nb, Mo, B) alloy isothermally compressed at different strain rates and temperatures on Gleeble-1500D thermal-simulation machine were investigated. The results indicated that the load increased sharply first, and then kept constant, and finally increased again as the displacement increased continuously. A crack-free pancake was obtained when the ingot was packing forged at 1150°C and with strain rate of 0.1/s. The microstructure of the pancake consisted of major kinked/broken lamellae and dynamic recrystallization grains, minor residual β phase and remnant lamellae. After annealed at 1180°C for 5 hours, a homogeneous microstructure with fine and equiaxed grains was obtained. With elimination of the residual β phase, the uniformity of the microstructure was greatly improved as well.",

keywords = "Homogeneity of microstructure, Hot deformation behavior, Isothermal compression, Packed forging, β phase",

author = "Deng, {Zhi Hai} and Li, {Jin Shan} and Zhang, {Tie Bang} and Hong Zhong and Hui Chang",

year = "2012",

month = apr,

doi = "10.3969/j.issn.1007-2012.2012.02.009",

language = "英语",

volume = "19",

pages = "43--48",

journal = "Suxing Gongcheng Xuebao/Journal of Plasticity Engineering",

issn = "1007-2012",

publisher = "Beijing Res. Inst. of Mechanical and Elec. Technology",

number = "2",

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TY - JOUR

T1 - Packed forging and microstructure optimization of β-solidified TiAl alloy

AU - Deng, Zhi Hai

AU - Li, Jin Shan

AU - Zhang, Tie Bang

AU - Zhong, Hong

AU - Chang, Hui

PY - 2012/4

Y1 - 2012/4

N2 - The displacement-load curves of Ti-43Al-5(Nb, Mo, B) alloy isothermally compressed at different strain rates and temperatures on Gleeble-1500D thermal-simulation machine were investigated. The results indicated that the load increased sharply first, and then kept constant, and finally increased again as the displacement increased continuously. A crack-free pancake was obtained when the ingot was packing forged at 1150°C and with strain rate of 0.1/s. The microstructure of the pancake consisted of major kinked/broken lamellae and dynamic recrystallization grains, minor residual β phase and remnant lamellae. After annealed at 1180°C for 5 hours, a homogeneous microstructure with fine and equiaxed grains was obtained. With elimination of the residual β phase, the uniformity of the microstructure was greatly improved as well.

AB - The displacement-load curves of Ti-43Al-5(Nb, Mo, B) alloy isothermally compressed at different strain rates and temperatures on Gleeble-1500D thermal-simulation machine were investigated. The results indicated that the load increased sharply first, and then kept constant, and finally increased again as the displacement increased continuously. A crack-free pancake was obtained when the ingot was packing forged at 1150°C and with strain rate of 0.1/s. The microstructure of the pancake consisted of major kinked/broken lamellae and dynamic recrystallization grains, minor residual β phase and remnant lamellae. After annealed at 1180°C for 5 hours, a homogeneous microstructure with fine and equiaxed grains was obtained. With elimination of the residual β phase, the uniformity of the microstructure was greatly improved as well.

KW - Homogeneity of microstructure

KW - Hot deformation behavior

KW - Isothermal compression

KW - Packed forging

KW - β phase

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U2 - 10.3969/j.issn.1007-2012.2012.02.009

DO - 10.3969/j.issn.1007-2012.2012.02.009

M3 - 文章

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SN - 1007-2012

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SP - 43

EP - 48

JO - Suxing Gongcheng Xuebao/Journal of Plasticity Engineering

JF - Suxing Gongcheng Xuebao/Journal of Plasticity Engineering

IS - 2

ER -

Packed forging and microstructure optimization of β-solidified TiAl alloy

Abstract

Keywords

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