An atomic study of the transitional region between γ/γ laths in γ-TiAl

Hanlei Zhang; Hongchao Kou; Jieren Yang; Jun Wang; Jinshan Li; Xiangyi Xue

doi:10.1016/j.intermet.2014.12.012

An atomic study of the transitional region between γ/γ laths in γ-TiAl

Hanlei Zhang, Hongchao Kou, Jieren Yang, Jun Wang, Jinshan Li, Xiangyi Xue

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

7 Scopus citations

Abstract

In the present study, a transitional region between two thick γ laths is investigated with TEM, HAADF-STEM, EDX and HRTEM. The results show that the transitional region consists of three thinner γ laths, and all the thick and thin laths have a true twin relationship. The interface between γ/γ laths is basically a twin-related interface but involving a rigid body translation of the adjacent lamellae, and misfit compensating has been observed along the interface. Ti segregates into the transitional region, which is essential to formation of the three thin γ laths. Based on the characterization of the transitional region, the formation mechanism of the transitional region is revealed.

Original language	English
Pages (from-to)	13-18
Number of pages	6
Journal	Intermetallics
Volume	60
DOIs	https://doi.org/10.1016/j.intermet.2014.12.012
State	Published - May 2015

Keywords

A. Titanium aluminides based on TiAl
B. Crystallography
B. Twinning
D. Defects: planar faults
D. Grain boundaries structure

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10.1016/j.intermet.2014.12.012

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title = "An atomic study of the transitional region between γ/γ laths in γ-TiAl",

abstract = "In the present study, a transitional region between two thick γ laths is investigated with TEM, HAADF-STEM, EDX and HRTEM. The results show that the transitional region consists of three thinner γ laths, and all the thick and thin laths have a true twin relationship. The interface between γ/γ laths is basically a twin-related interface but involving a rigid body translation of the adjacent lamellae, and misfit compensating has been observed along the interface. Ti segregates into the transitional region, which is essential to formation of the three thin γ laths. Based on the characterization of the transitional region, the formation mechanism of the transitional region is revealed.",

keywords = "A. Titanium aluminides based on TiAl, B. Crystallography, B. Twinning, D. Defects: planar faults, D. Grain boundaries structure",

author = "Hanlei Zhang and Hongchao Kou and Jieren Yang and Jun Wang and Jinshan Li and Xiangyi Xue",

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doi = "10.1016/j.intermet.2014.12.012",

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journal = "Intermetallics",

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TY - JOUR

T1 - An atomic study of the transitional region between γ/γ laths in γ-TiAl

AU - Zhang, Hanlei

AU - Kou, Hongchao

AU - Yang, Jieren

AU - Wang, Jun

AU - Li, Jinshan

AU - Xue, Xiangyi

PY - 2015/5

Y1 - 2015/5

N2 - In the present study, a transitional region between two thick γ laths is investigated with TEM, HAADF-STEM, EDX and HRTEM. The results show that the transitional region consists of three thinner γ laths, and all the thick and thin laths have a true twin relationship. The interface between γ/γ laths is basically a twin-related interface but involving a rigid body translation of the adjacent lamellae, and misfit compensating has been observed along the interface. Ti segregates into the transitional region, which is essential to formation of the three thin γ laths. Based on the characterization of the transitional region, the formation mechanism of the transitional region is revealed.

AB - In the present study, a transitional region between two thick γ laths is investigated with TEM, HAADF-STEM, EDX and HRTEM. The results show that the transitional region consists of three thinner γ laths, and all the thick and thin laths have a true twin relationship. The interface between γ/γ laths is basically a twin-related interface but involving a rigid body translation of the adjacent lamellae, and misfit compensating has been observed along the interface. Ti segregates into the transitional region, which is essential to formation of the three thin γ laths. Based on the characterization of the transitional region, the formation mechanism of the transitional region is revealed.

KW - A. Titanium aluminides based on TiAl

KW - B. Crystallography

KW - B. Twinning

KW - D. Defects: planar faults

KW - D. Grain boundaries structure

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DO - 10.1016/j.intermet.2014.12.012

M3 - 文章

AN - SCOPUS:84921941287

SN - 0966-9795

VL - 60

SP - 13

EP - 18

JO - Intermetallics

JF - Intermetallics

ER -

An atomic study of the transitional region between γ/γ laths in γ-TiAl

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