Stress relaxation induced spheroidization of the lamellar α phase in Ti-7333 alloy

C. L. Jia; H. C. Kou; N. N. Chen; S. B. Liu; J. K. Fan; B. Tang; J. S. Li

doi:10.1016/j.jallcom.2018.11.230

Stress relaxation induced spheroidization of the lamellar α phase in Ti-7333 alloy

C. L. Jia, H. C. Kou, N. N. Chen, S. B. Liu, J. K. Fan, B. Tang, J. S. Li

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

12 Scopus citations

Abstract

In this paper, stress relaxation tests were performed on β-forged Ti-7333 alloy at the temperature of 750 °C. Transmission Electron Microscope (TEM) and Electron Backscattered Diffraction (EBSD) were adopted to study the microstructure evolution and deformation mechanism. The characterization of microstructure indicates that the residual α lamellae after hot deformation could be broken down during stress relaxation so that a nearly homogeneous globular microstructure can be obtained. The stress exponent and TEM observation show that dislocation creep is the main deformation mechanism, leading to the formation of high angle boundaries across the α plates and the breaking up of α lamellae. Dynamic recovery is the main mechanism in the β phase during stress relaxation.

Original language	English
Pages (from-to)	674-679
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	781
DOIs	https://doi.org/10.1016/j.jallcom.2018.11.230
State	Published - 15 Apr 2019

Keywords

Hot deformation
Lamellar α spheroidization
Near β titanium alloy
Stress relaxation

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10.1016/j.jallcom.2018.11.230

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title = "Stress relaxation induced spheroidization of the lamellar α phase in Ti-7333 alloy",

abstract = "In this paper, stress relaxation tests were performed on β-forged Ti-7333 alloy at the temperature of 750 °C. Transmission Electron Microscope (TEM) and Electron Backscattered Diffraction (EBSD) were adopted to study the microstructure evolution and deformation mechanism. The characterization of microstructure indicates that the residual α lamellae after hot deformation could be broken down during stress relaxation so that a nearly homogeneous globular microstructure can be obtained. The stress exponent and TEM observation show that dislocation creep is the main deformation mechanism, leading to the formation of high angle boundaries across the α plates and the breaking up of α lamellae. Dynamic recovery is the main mechanism in the β phase during stress relaxation.",

keywords = "Hot deformation, Lamellar α spheroidization, Near β titanium alloy, Stress relaxation",

author = "Jia, {C. L.} and Kou, {H. C.} and Chen, {N. N.} and Liu, {S. B.} and Fan, {J. K.} and B. Tang and Li, {J. S.}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2019",

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day = "15",

doi = "10.1016/j.jallcom.2018.11.230",

language = "英语",

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TY - JOUR

T1 - Stress relaxation induced spheroidization of the lamellar α phase in Ti-7333 alloy

AU - Jia, C. L.

AU - Kou, H. C.

AU - Chen, N. N.

AU - Liu, S. B.

AU - Fan, J. K.

AU - Tang, B.

AU - Li, J. S.

PY - 2019/4/15

Y1 - 2019/4/15

N2 - In this paper, stress relaxation tests were performed on β-forged Ti-7333 alloy at the temperature of 750 °C. Transmission Electron Microscope (TEM) and Electron Backscattered Diffraction (EBSD) were adopted to study the microstructure evolution and deformation mechanism. The characterization of microstructure indicates that the residual α lamellae after hot deformation could be broken down during stress relaxation so that a nearly homogeneous globular microstructure can be obtained. The stress exponent and TEM observation show that dislocation creep is the main deformation mechanism, leading to the formation of high angle boundaries across the α plates and the breaking up of α lamellae. Dynamic recovery is the main mechanism in the β phase during stress relaxation.

AB - In this paper, stress relaxation tests were performed on β-forged Ti-7333 alloy at the temperature of 750 °C. Transmission Electron Microscope (TEM) and Electron Backscattered Diffraction (EBSD) were adopted to study the microstructure evolution and deformation mechanism. The characterization of microstructure indicates that the residual α lamellae after hot deformation could be broken down during stress relaxation so that a nearly homogeneous globular microstructure can be obtained. The stress exponent and TEM observation show that dislocation creep is the main deformation mechanism, leading to the formation of high angle boundaries across the α plates and the breaking up of α lamellae. Dynamic recovery is the main mechanism in the β phase during stress relaxation.

KW - Hot deformation

KW - Lamellar α spheroidization

KW - Near β titanium alloy

KW - Stress relaxation

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U2 - 10.1016/j.jallcom.2018.11.230

DO - 10.1016/j.jallcom.2018.11.230

M3 - 文章

AN - SCOPUS:85058402836

SN - 0925-8388

VL - 781

SP - 674

EP - 679

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Stress relaxation induced spheroidization of the lamellar α phase in Ti-7333 alloy

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Keywords

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