Precipitation of two kinds of γ laths in massive γ coexisting with γ lamellae in as-cast Ta-containing TiAl-Nb alloys

Keren Zhang; Rui Hu; Xuyang Wang; Jieren Yang

doi:10.1016/j.matlet.2016.09.046

Precipitation of two kinds of γ laths in massive γ coexisting with γ lamellae in as-cast Ta-containing TiAl-Nb alloys

Keren Zhang
, Rui Hu
, Xuyang Wang
, Jieren Yang

材料学院

Northwestern Polytechnical University Xian

科研成果: 期刊稿件 › 文章 › 同行评审

9 引用（Scopus）

摘要

The relationship between γ_m phase (diffusionless transformation) and γ lamellae (diffusion transformation) and the precipitation of γ laths in γ_m were experimentally characterized in a Ta-containing as-cast TiAl-Nb alloy. Unlike the irregular and curved boundary of γ_m obtained by completely diffusionless transformation, γ_m phase formed in this work presents a particular orientation relationship with γ lamellae which is confirmed to be 120° rotational relationship. It indicates that γ lamellae can grow through the existed γ_m phase due to diffusion-controlled growth. Meanwhile, two kinds of γ laths shown true-twin and pseudo-twin relationship with γ_m respectively can be found, which can relax the stress in γ_m phase. The precipitation mechanisms of these laths are discussed.

源语言	英语
页（从-至）	480-483
页数	4
期刊	Materials Letters
卷	185
DOI	https://doi.org/10.1016/j.matlet.2016.09.046
出版状态	已出版 - 15 12月 2016

访问文件

10.1016/j.matlet.2016.09.046

其它文件与链接

链接到 Scopus 的出版物

引用此

@article{2c87406815e54329bd07acbb6cea7462,

title = "Precipitation of two kinds of γ laths in massive γ coexisting with γ lamellae in as-cast Ta-containing TiAl-Nb alloys",

abstract = "The relationship between γm phase (diffusionless transformation) and γ lamellae (diffusion transformation) and the precipitation of γ laths in γm were experimentally characterized in a Ta-containing as-cast TiAl-Nb alloy. Unlike the irregular and curved boundary of γm obtained by completely diffusionless transformation, γm phase formed in this work presents a particular orientation relationship with γ lamellae which is confirmed to be 120° rotational relationship. It indicates that γ lamellae can grow through the existed γm phase due to diffusion-controlled growth. Meanwhile, two kinds of γ laths shown true-twin and pseudo-twin relationship with γm respectively can be found, which can relax the stress in γm phase. The precipitation mechanisms of these laths are discussed.",

keywords = "Intermetallic alloys and compounds, Microstructure, Ta elements, Twin, γ phase",

author = "Keren Zhang and Rui Hu and Xuyang Wang and Jieren Yang",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2016",

month = dec,

day = "15",

doi = "10.1016/j.matlet.2016.09.046",

language = "英语",

volume = "185",

pages = "480--483",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Precipitation of two kinds of γ laths in massive γ coexisting with γ lamellae in as-cast Ta-containing TiAl-Nb alloys

AU - Zhang, Keren

AU - Hu, Rui

AU - Wang, Xuyang

AU - Yang, Jieren

PY - 2016/12/15

Y1 - 2016/12/15

N2 - The relationship between γm phase (diffusionless transformation) and γ lamellae (diffusion transformation) and the precipitation of γ laths in γm were experimentally characterized in a Ta-containing as-cast TiAl-Nb alloy. Unlike the irregular and curved boundary of γm obtained by completely diffusionless transformation, γm phase formed in this work presents a particular orientation relationship with γ lamellae which is confirmed to be 120° rotational relationship. It indicates that γ lamellae can grow through the existed γm phase due to diffusion-controlled growth. Meanwhile, two kinds of γ laths shown true-twin and pseudo-twin relationship with γm respectively can be found, which can relax the stress in γm phase. The precipitation mechanisms of these laths are discussed.

AB - The relationship between γm phase (diffusionless transformation) and γ lamellae (diffusion transformation) and the precipitation of γ laths in γm were experimentally characterized in a Ta-containing as-cast TiAl-Nb alloy. Unlike the irregular and curved boundary of γm obtained by completely diffusionless transformation, γm phase formed in this work presents a particular orientation relationship with γ lamellae which is confirmed to be 120° rotational relationship. It indicates that γ lamellae can grow through the existed γm phase due to diffusion-controlled growth. Meanwhile, two kinds of γ laths shown true-twin and pseudo-twin relationship with γm respectively can be found, which can relax the stress in γm phase. The precipitation mechanisms of these laths are discussed.

KW - Intermetallic alloys and compounds

KW - Microstructure

KW - Ta elements

KW - Twin

KW - γ phase

UR - https://www.scopus.com/pages/publications/84988458320

U2 - 10.1016/j.matlet.2016.09.046

DO - 10.1016/j.matlet.2016.09.046

M3 - 文章

AN - SCOPUS:84988458320

SN - 0167-577X

VL - 185

SP - 480

EP - 483

JO - Materials Letters

JF - Materials Letters

ER -

Precipitation of two kinds of γ laths in massive γ coexisting with γ lamellae in as-cast Ta-containing TiAl-Nb alloys

摘要

访问文件

其它文件与链接

学术指纹

引用此