Microstructure and mechanical properties of large size Ti-43Al-9V-0.2Y alloy pancake produced by pack-forging

Yongjun Su; Fantao Kong; Yuyong Chen; Na Gao; Deliang Zhang

doi:10.1016/j.intermet.2012.11.004

Microstructure and mechanical properties of large size Ti-43Al-9V-0.2Y alloy pancake produced by pack-forging

Yongjun Su
, Fantao Kong^*
, Yuyong Chen
, Na Gao
, Deliang Zhang

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology
Central South University
University of Waikato

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

62 Scopus citations

Abstract

A pancake of Ti-43Al-9V-0.2Y (at.%) alloy with dimensions of φ480 mm × 46 mm was fabricated by pack-forging with a thick reduction of 80%. The as-forged Ti-43Al-9V-0.2Y alloy pancake has a duplex (DP) microstructure, which is composed of B2/α₂/γ lamellar colonies and massive B2 and γ phase regions distributed along the boundaries between the lamellar colonies. Different microstructures were obtained by heat treatment of samples cut from the as-forged Ti-43Al-9V-0.2Y alloy pancake. A fully lamellar (FL) structure consisting of B2/α₂/γ lamellar colonies was obtained after the heat treatment of 1350 °C/8 h. Tensile test results exhibited that the yield strength (YS) and ultimate tensile strength (UTS) of the alloy with DP microstructure were decreased from 680.7 MPa to 834.3 MPa at room temperature to 589.5 MPa and 693.1 MPa at 700 °C, respectively, and the elongation (δ) of the alloy with DP microstructure was increased from 1.99% at room temperature to 12.12% at 700 °C; the elongation (δ) of the alloy with FL microstructure was increased from 1.52% at room temperature to 85.84% at 800 °C.

Original language	English
Pages (from-to)	29-34
Number of pages	6
Journal	Intermetallics
Volume	34
DOIs	https://doi.org/10.1016/j.intermet.2012.11.004
State	Published - Mar 2013

Keywords

A. Titanium aluminides based on Tial
B. Mechanical properties at ambient temperature
B. Mechanical properties at high temperatures
C. Heat treatment
C. Isothermal forging
D. Microstructure

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10.1016/j.intermet.2012.11.004

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@article{eca456a606274bb1af76ae295f1448c1,

title = "Microstructure and mechanical properties of large size Ti-43Al-9V-0.2Y alloy pancake produced by pack-forging",

abstract = "A pancake of Ti-43Al-9V-0.2Y (at.\%) alloy with dimensions of φ480 mm × 46 mm was fabricated by pack-forging with a thick reduction of 80\%. The as-forged Ti-43Al-9V-0.2Y alloy pancake has a duplex (DP) microstructure, which is composed of B2/α2/γ lamellar colonies and massive B2 and γ phase regions distributed along the boundaries between the lamellar colonies. Different microstructures were obtained by heat treatment of samples cut from the as-forged Ti-43Al-9V-0.2Y alloy pancake. A fully lamellar (FL) structure consisting of B2/α2/γ lamellar colonies was obtained after the heat treatment of 1350 °C/8 h. Tensile test results exhibited that the yield strength (YS) and ultimate tensile strength (UTS) of the alloy with DP microstructure were decreased from 680.7 MPa to 834.3 MPa at room temperature to 589.5 MPa and 693.1 MPa at 700 °C, respectively, and the elongation (δ) of the alloy with DP microstructure was increased from 1.99\% at room temperature to 12.12\% at 700 °C; the elongation (δ) of the alloy with FL microstructure was increased from 1.52\% at room temperature to 85.84\% at 800 °C.",

keywords = "A. Titanium aluminides based on Tial, B. Mechanical properties at ambient temperature, B. Mechanical properties at high temperatures, C. Heat treatment, C. Isothermal forging, D. Microstructure",

author = "Yongjun Su and Fantao Kong and Yuyong Chen and Na Gao and Deliang Zhang",

year = "2013",

month = mar,

doi = "10.1016/j.intermet.2012.11.004",

language = "英语",

volume = "34",

pages = "29--34",

journal = "Intermetallics",

issn = "0966-9795",

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T1 - Microstructure and mechanical properties of large size Ti-43Al-9V-0.2Y alloy pancake produced by pack-forging

AU - Su, Yongjun

AU - Kong, Fantao

AU - Chen, Yuyong

AU - Gao, Na

AU - Zhang, Deliang

PY - 2013/3

Y1 - 2013/3

N2 - A pancake of Ti-43Al-9V-0.2Y (at.%) alloy with dimensions of φ480 mm × 46 mm was fabricated by pack-forging with a thick reduction of 80%. The as-forged Ti-43Al-9V-0.2Y alloy pancake has a duplex (DP) microstructure, which is composed of B2/α2/γ lamellar colonies and massive B2 and γ phase regions distributed along the boundaries between the lamellar colonies. Different microstructures were obtained by heat treatment of samples cut from the as-forged Ti-43Al-9V-0.2Y alloy pancake. A fully lamellar (FL) structure consisting of B2/α2/γ lamellar colonies was obtained after the heat treatment of 1350 °C/8 h. Tensile test results exhibited that the yield strength (YS) and ultimate tensile strength (UTS) of the alloy with DP microstructure were decreased from 680.7 MPa to 834.3 MPa at room temperature to 589.5 MPa and 693.1 MPa at 700 °C, respectively, and the elongation (δ) of the alloy with DP microstructure was increased from 1.99% at room temperature to 12.12% at 700 °C; the elongation (δ) of the alloy with FL microstructure was increased from 1.52% at room temperature to 85.84% at 800 °C.

AB - A pancake of Ti-43Al-9V-0.2Y (at.%) alloy with dimensions of φ480 mm × 46 mm was fabricated by pack-forging with a thick reduction of 80%. The as-forged Ti-43Al-9V-0.2Y alloy pancake has a duplex (DP) microstructure, which is composed of B2/α2/γ lamellar colonies and massive B2 and γ phase regions distributed along the boundaries between the lamellar colonies. Different microstructures were obtained by heat treatment of samples cut from the as-forged Ti-43Al-9V-0.2Y alloy pancake. A fully lamellar (FL) structure consisting of B2/α2/γ lamellar colonies was obtained after the heat treatment of 1350 °C/8 h. Tensile test results exhibited that the yield strength (YS) and ultimate tensile strength (UTS) of the alloy with DP microstructure were decreased from 680.7 MPa to 834.3 MPa at room temperature to 589.5 MPa and 693.1 MPa at 700 °C, respectively, and the elongation (δ) of the alloy with DP microstructure was increased from 1.99% at room temperature to 12.12% at 700 °C; the elongation (δ) of the alloy with FL microstructure was increased from 1.52% at room temperature to 85.84% at 800 °C.

KW - A. Titanium aluminides based on Tial

KW - B. Mechanical properties at ambient temperature

KW - B. Mechanical properties at high temperatures

KW - C. Heat treatment

KW - C. Isothermal forging

KW - D. Microstructure

UR - https://www.scopus.com/pages/publications/84870179262

U2 - 10.1016/j.intermet.2012.11.004

DO - 10.1016/j.intermet.2012.11.004

M3 - 文章

AN - SCOPUS:84870179262

SN - 0966-9795

VL - 34

SP - 29

EP - 34

JO - Intermetallics

JF - Intermetallics

ER -

Microstructure and mechanical properties of large size Ti-43Al-9V-0.2Y alloy pancake produced by pack-forging

Abstract

Keywords

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