Effects of extrusion deformation on microstructure, mechanical properties and hot workability of Β containing TiAl alloy

W. C. Xu; D. B. Shan; H. Zhang; X. A. Li; Y. Z. Zhang; S. Nutt

doi:10.1016/j.msea.2013.02.005

Effects of extrusion deformation on microstructure, mechanical properties and hot workability of Β containing TiAl alloy

W. C. Xu^*
, D. B. Shan
, H. Zhang
, X. A. Li
, Y. Z. Zhang
, S. Nutt

^*Corresponding author for this work

Harbin Institute of Technology
China Aerospace Science and Technology Corporation
University of Southern California

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

45 Scopus citations

Abstract

Hot extrusion was performed on a Ti-42Al-9V-0.3Y alloy at 1200-1325°C to explore effects on mechanical properties and hot workability. The microstructure after hot extrusion was analyzed, tensile tests were conducted, and hot workability was assessed. Three types of microstructures resulted from extrusion at increasing temperature, including a dual-phase microstructure (DPM), a bi-lamellar microstructure with retained gamma phase (BLMG), and a bi-lamellar microstructure (BLM). Hot extrusion of the TiAl alloy in the range of 1275-1325°C produced the BLM microstructure, yielding superior comprehensive properties. The predominant fracture mode was transgranular cleavage fracture in the DPM, translamellar cleavage and delamination in BLM, and mixed fracture in BLMG. Aggregation of the YAl₂ phase accelerated the fracture of the as-extruded alloy. As-extruded Ti-42Al-9V-0.3Y alloy exhibited excellent high-temperature mechanical properties and hot workability, demonstrating the feasibility of precision forming TiAl alloy components by conventional hot forging with nickel-based alloy dies.

Original language	English
Pages (from-to)	199-206
Number of pages	8
Journal	Materials Science and Engineering: A
Volume	571
DOIs	https://doi.org/10.1016/j.msea.2013.02.005
State	Published - 1 Jun 2013
Externally published	Yes

Keywords

Hot extrusion
Hot workability
Intermetallics
Mechanical properties
TiAl alloys

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10.1016/j.msea.2013.02.005

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title = "Effects of extrusion deformation on microstructure, mechanical properties and hot workability of Β containing TiAl alloy",

abstract = "Hot extrusion was performed on a Ti-42Al-9V-0.3Y alloy at 1200-1325°C to explore effects on mechanical properties and hot workability. The microstructure after hot extrusion was analyzed, tensile tests were conducted, and hot workability was assessed. Three types of microstructures resulted from extrusion at increasing temperature, including a dual-phase microstructure (DPM), a bi-lamellar microstructure with retained gamma phase (BLMG), and a bi-lamellar microstructure (BLM). Hot extrusion of the TiAl alloy in the range of 1275-1325°C produced the BLM microstructure, yielding superior comprehensive properties. The predominant fracture mode was transgranular cleavage fracture in the DPM, translamellar cleavage and delamination in BLM, and mixed fracture in BLMG. Aggregation of the YAl2 phase accelerated the fracture of the as-extruded alloy. As-extruded Ti-42Al-9V-0.3Y alloy exhibited excellent high-temperature mechanical properties and hot workability, demonstrating the feasibility of precision forming TiAl alloy components by conventional hot forging with nickel-based alloy dies.",

keywords = "Hot extrusion, Hot workability, Intermetallics, Mechanical properties, TiAl alloys",

author = "Xu, \{W. C.\} and Shan, \{D. B.\} and H. Zhang and Li, \{X. A.\} and Zhang, \{Y. Z.\} and S. Nutt",

year = "2013",

month = jun,

day = "1",

doi = "10.1016/j.msea.2013.02.005",

language = "英语",

volume = "571",

pages = "199--206",

journal = "Materials Science and Engineering: A",

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T1 - Effects of extrusion deformation on microstructure, mechanical properties and hot workability of Β containing TiAl alloy

AU - Xu, W. C.

AU - Shan, D. B.

AU - Zhang, H.

AU - Li, X. A.

AU - Zhang, Y. Z.

AU - Nutt, S.

PY - 2013/6/1

Y1 - 2013/6/1

N2 - Hot extrusion was performed on a Ti-42Al-9V-0.3Y alloy at 1200-1325°C to explore effects on mechanical properties and hot workability. The microstructure after hot extrusion was analyzed, tensile tests were conducted, and hot workability was assessed. Three types of microstructures resulted from extrusion at increasing temperature, including a dual-phase microstructure (DPM), a bi-lamellar microstructure with retained gamma phase (BLMG), and a bi-lamellar microstructure (BLM). Hot extrusion of the TiAl alloy in the range of 1275-1325°C produced the BLM microstructure, yielding superior comprehensive properties. The predominant fracture mode was transgranular cleavage fracture in the DPM, translamellar cleavage and delamination in BLM, and mixed fracture in BLMG. Aggregation of the YAl2 phase accelerated the fracture of the as-extruded alloy. As-extruded Ti-42Al-9V-0.3Y alloy exhibited excellent high-temperature mechanical properties and hot workability, demonstrating the feasibility of precision forming TiAl alloy components by conventional hot forging with nickel-based alloy dies.

AB - Hot extrusion was performed on a Ti-42Al-9V-0.3Y alloy at 1200-1325°C to explore effects on mechanical properties and hot workability. The microstructure after hot extrusion was analyzed, tensile tests were conducted, and hot workability was assessed. Three types of microstructures resulted from extrusion at increasing temperature, including a dual-phase microstructure (DPM), a bi-lamellar microstructure with retained gamma phase (BLMG), and a bi-lamellar microstructure (BLM). Hot extrusion of the TiAl alloy in the range of 1275-1325°C produced the BLM microstructure, yielding superior comprehensive properties. The predominant fracture mode was transgranular cleavage fracture in the DPM, translamellar cleavage and delamination in BLM, and mixed fracture in BLMG. Aggregation of the YAl2 phase accelerated the fracture of the as-extruded alloy. As-extruded Ti-42Al-9V-0.3Y alloy exhibited excellent high-temperature mechanical properties and hot workability, demonstrating the feasibility of precision forming TiAl alloy components by conventional hot forging with nickel-based alloy dies.

KW - Hot extrusion

KW - Hot workability

KW - Intermetallics

KW - Mechanical properties

KW - TiAl alloys

UR - https://www.scopus.com/pages/publications/84874933114

U2 - 10.1016/j.msea.2013.02.005

DO - 10.1016/j.msea.2013.02.005

M3 - 文章

AN - SCOPUS:84874933114

SN - 0921-5093

VL - 571

SP - 199

EP - 206

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Effects of extrusion deformation on microstructure, mechanical properties and hot workability of Β containing TiAl alloy

Abstract

Keywords

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