Microstructure evolution and mechanical properties of PM-Ti43Al9V0.3Y alloy

Dongdong Zhang; Na Liu; Yuyong Chen; Guoqing Zhang; Jing Tian; Fantao Kong; Shulong Xiao; Jianfei Sun

doi:10.3390/ma13010198

Microstructure evolution and mechanical properties of PM-Ti43Al9V0.3Y alloy

Dongdong Zhang
, Na Liu
, Yuyong Chen
, Guoqing Zhang
, Jing Tian
, Fantao Kong
, Shulong Xiao
, Jianfei Sun^*

^*Corresponding author for this work

Harbin Institute of Technology
Beijing Institute of Aeronautical Materials
Panzhihua University

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

18 Scopus citations

Abstract

A novel strategy of microstructure design is introduced to improve the mechanical properties of TiAl alloys, fabricated by powder metallurgy. The gas atomization powder and as-HIPed (Hot isostatic pressing) TiAl are investigated by scanning electron microscopy, energy dispersive spectrometry, transmission electron microscopy, and electron backscattered diffraction. The dispersed submicron precipitate in the microstructure is determined to be Y₂O₃. A microstructure with uniform fine grain is obtained. The room temperature strength and strain reach 793 MPa and 1.5%, respectively. The strength and strain at 700 °C are still as high as 664 MPa and 9.2%, respectively. The fine grain and precipitate lead to a high room-temperature plasticity.

Original language	English
Article number	198
Journal	Materials
Volume	13
Issue number	1
DOIs	https://doi.org/10.3390/ma13010198
State	Published - 1 Jan 2020
Externally published	Yes

Keywords

Fine grain
HIP
Submicron precipitate
TiAl powder

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10.3390/ma13010198

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title = "Microstructure evolution and mechanical properties of PM-Ti43Al9V0.3Y alloy",

abstract = "A novel strategy of microstructure design is introduced to improve the mechanical properties of TiAl alloys, fabricated by powder metallurgy. The gas atomization powder and as-HIPed (Hot isostatic pressing) TiAl are investigated by scanning electron microscopy, energy dispersive spectrometry, transmission electron microscopy, and electron backscattered diffraction. The dispersed submicron precipitate in the microstructure is determined to be Y2O3. A microstructure with uniform fine grain is obtained. The room temperature strength and strain reach 793 MPa and 1.5\%, respectively. The strength and strain at 700 °C are still as high as 664 MPa and 9.2\%, respectively. The fine grain and precipitate lead to a high room-temperature plasticity.",

keywords = "Fine grain, HIP, Submicron precipitate, TiAl powder",

author = "Dongdong Zhang and Na Liu and Yuyong Chen and Guoqing Zhang and Jing Tian and Fantao Kong and Shulong Xiao and Jianfei Sun",

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day = "1",

doi = "10.3390/ma13010198",

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volume = "13",

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T1 - Microstructure evolution and mechanical properties of PM-Ti43Al9V0.3Y alloy

AU - Zhang, Dongdong

AU - Liu, Na

AU - Chen, Yuyong

AU - Zhang, Guoqing

AU - Tian, Jing

AU - Kong, Fantao

AU - Xiao, Shulong

AU - Sun, Jianfei

PY - 2020/1/1

Y1 - 2020/1/1

N2 - A novel strategy of microstructure design is introduced to improve the mechanical properties of TiAl alloys, fabricated by powder metallurgy. The gas atomization powder and as-HIPed (Hot isostatic pressing) TiAl are investigated by scanning electron microscopy, energy dispersive spectrometry, transmission electron microscopy, and electron backscattered diffraction. The dispersed submicron precipitate in the microstructure is determined to be Y2O3. A microstructure with uniform fine grain is obtained. The room temperature strength and strain reach 793 MPa and 1.5%, respectively. The strength and strain at 700 °C are still as high as 664 MPa and 9.2%, respectively. The fine grain and precipitate lead to a high room-temperature plasticity.

AB - A novel strategy of microstructure design is introduced to improve the mechanical properties of TiAl alloys, fabricated by powder metallurgy. The gas atomization powder and as-HIPed (Hot isostatic pressing) TiAl are investigated by scanning electron microscopy, energy dispersive spectrometry, transmission electron microscopy, and electron backscattered diffraction. The dispersed submicron precipitate in the microstructure is determined to be Y2O3. A microstructure with uniform fine grain is obtained. The room temperature strength and strain reach 793 MPa and 1.5%, respectively. The strength and strain at 700 °C are still as high as 664 MPa and 9.2%, respectively. The fine grain and precipitate lead to a high room-temperature plasticity.

KW - Fine grain

KW - HIP

KW - Submicron precipitate

KW - TiAl powder

UR - https://www.scopus.com/pages/publications/85078955117

U2 - 10.3390/ma13010198

DO - 10.3390/ma13010198

M3 - 文章

AN - SCOPUS:85078955117

SN - 1996-1944

VL - 13

JO - Materials

JF - Materials

IS - 1

M1 - 198

ER -

Microstructure evolution and mechanical properties of PM-Ti43Al9V0.3Y alloy

Abstract

Keywords

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