Flow softening and microstructural evolution of TC11 titanium alloy during hot deformation

Y. Y. Zong; D. B. Shan; M. Xu; Y. Lv

doi:10.1016/j.jmatprotec.2008.04.063

Flow softening and microstructural evolution of TC11 titanium alloy during hot deformation

Y. Y. Zong^*
, D. B. Shan
, M. Xu
, Y. Lv

^*Corresponding author for this work

Harbin Institute of Technology

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

149 Scopus citations

Abstract

Hot compression tests on samples of the TC11 (Ti-6.5Al-3.5Mo-1.5Zr-0.3Si) titanium alloy have been done within the temperatures of 750-950 °C and strain rate ranges of 0.1-10 s^-1 to 40-60% height reduction. The experimental results show that the flow stress behavior can be described by an exponential law for the deformation conditions. The hot deformation activation energy (Q) derived from the experimental data is 538 kJ mol^-1 with a strain rate sensitivity exponent (m) of 0.107. Optical microstructure evidence shows that dynamic recrystallization (DRX) takes place during the deformation process. Moreover, only α DRX grains are founded in the titanium alloys. The influences of hot working parameters on the flow stress behavior and microstructural features of TC11 alloy, especially on the type of phase present, the morphologies of the α phase, grain size and DRX are analyzed. The optimum parameters for hot working of TC11 alloy are developed.

Original language	English
Pages (from-to)	1988-1994
Number of pages	7
Journal	Journal of Materials Processing Technology
Volume	209
Issue number	4
DOIs	https://doi.org/10.1016/j.jmatprotec.2008.04.063
State	Published - 19 Feb 2009
Externally published	Yes

Keywords

Dynamic recrystallization
Flow softening
Hot working
Titanium alloys

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10.1016/j.jmatprotec.2008.04.063

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@article{819a30d59dcc4fdbba433f2ca0aea3f7,

title = "Flow softening and microstructural evolution of TC11 titanium alloy during hot deformation",

abstract = "Hot compression tests on samples of the TC11 (Ti-6.5Al-3.5Mo-1.5Zr-0.3Si) titanium alloy have been done within the temperatures of 750-950 °C and strain rate ranges of 0.1-10 s-1 to 40-60\% height reduction. The experimental results show that the flow stress behavior can be described by an exponential law for the deformation conditions. The hot deformation activation energy (Q) derived from the experimental data is 538 kJ mol-1 with a strain rate sensitivity exponent (m) of 0.107. Optical microstructure evidence shows that dynamic recrystallization (DRX) takes place during the deformation process. Moreover, only α DRX grains are founded in the titanium alloys. The influences of hot working parameters on the flow stress behavior and microstructural features of TC11 alloy, especially on the type of phase present, the morphologies of the α phase, grain size and DRX are analyzed. The optimum parameters for hot working of TC11 alloy are developed.",

keywords = "Dynamic recrystallization, Flow softening, Hot working, Titanium alloys",

author = "Zong, \{Y. Y.\} and Shan, \{D. B.\} and M. Xu and Y. Lv",

year = "2009",

month = feb,

day = "19",

doi = "10.1016/j.jmatprotec.2008.04.063",

language = "英语",

volume = "209",

pages = "1988--1994",

journal = "Journal of Materials Processing Technology",

issn = "0924-0136",

publisher = "Elsevier Ltd",

number = "4",

}

TY - JOUR

T1 - Flow softening and microstructural evolution of TC11 titanium alloy during hot deformation

AU - Zong, Y. Y.

AU - Shan, D. B.

AU - Xu, M.

AU - Lv, Y.

PY - 2009/2/19

Y1 - 2009/2/19

N2 - Hot compression tests on samples of the TC11 (Ti-6.5Al-3.5Mo-1.5Zr-0.3Si) titanium alloy have been done within the temperatures of 750-950 °C and strain rate ranges of 0.1-10 s-1 to 40-60% height reduction. The experimental results show that the flow stress behavior can be described by an exponential law for the deformation conditions. The hot deformation activation energy (Q) derived from the experimental data is 538 kJ mol-1 with a strain rate sensitivity exponent (m) of 0.107. Optical microstructure evidence shows that dynamic recrystallization (DRX) takes place during the deformation process. Moreover, only α DRX grains are founded in the titanium alloys. The influences of hot working parameters on the flow stress behavior and microstructural features of TC11 alloy, especially on the type of phase present, the morphologies of the α phase, grain size and DRX are analyzed. The optimum parameters for hot working of TC11 alloy are developed.

AB - Hot compression tests on samples of the TC11 (Ti-6.5Al-3.5Mo-1.5Zr-0.3Si) titanium alloy have been done within the temperatures of 750-950 °C and strain rate ranges of 0.1-10 s-1 to 40-60% height reduction. The experimental results show that the flow stress behavior can be described by an exponential law for the deformation conditions. The hot deformation activation energy (Q) derived from the experimental data is 538 kJ mol-1 with a strain rate sensitivity exponent (m) of 0.107. Optical microstructure evidence shows that dynamic recrystallization (DRX) takes place during the deformation process. Moreover, only α DRX grains are founded in the titanium alloys. The influences of hot working parameters on the flow stress behavior and microstructural features of TC11 alloy, especially on the type of phase present, the morphologies of the α phase, grain size and DRX are analyzed. The optimum parameters for hot working of TC11 alloy are developed.

KW - Dynamic recrystallization

KW - Flow softening

KW - Hot working

KW - Titanium alloys

UR - https://www.scopus.com/pages/publications/58249128180

U2 - 10.1016/j.jmatprotec.2008.04.063

DO - 10.1016/j.jmatprotec.2008.04.063

M3 - 文章

AN - SCOPUS:58249128180

SN - 0924-0136

VL - 209

SP - 1988

EP - 1994

JO - Journal of Materials Processing Technology

JF - Journal of Materials Processing Technology

IS - 4

ER -

Flow softening and microstructural evolution of TC11 titanium alloy during hot deformation

Abstract

Keywords

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