A novel β eutectoid decomposition in the Ru-containing γ-TiAl alloys

Yulun Wu; Rui Hu; Jieren Yang; Zitong Gao

doi:10.1016/j.matlet.2021.130762

A novel β eutectoid decomposition in the Ru-containing γ-TiAl alloys

Yulun Wu, Rui Hu, Jieren Yang, Zitong Gao

School of Materials Sience and Engineering

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

1 Scopus citations

Abstract

A eutectoid decomposition of β → τ₁ + γ was revealed in the Ru-containing γ-TiAl alloys by means of in-situ synchrotron radiation observation. The lamellar products formed by cooperative growth was observed after Ar quenching and evolved into non-lamellar morphology with the cooling rate decreasing. The lamellar eutectoid nodulus either precipitated attaching to γ phase or directly nucleated in parent β phase. The approximate eutectoid composition is 39.03%Ti, 50.25%Al and 10.71%Ru. The τ₁ product in one nodulus processes the same crystallographic orientation but unclear orientation relationship with γ product. In addition, the diffusion-controlled eutectoid decomposition is quite sluggish because of the slow diffusion rate of Ru atom.

Original language	English
Article number	130762
Journal	Materials Letters
Volume	305
DOIs	https://doi.org/10.1016/j.matlet.2021.130762
State	Published - 15 Dec 2021

Keywords

Eutectoid decomposition
Intermetallic alloys and compounds
Microstructure
Phase transformation
X-ray techniques

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10.1016/j.matlet.2021.130762

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title = "A novel β eutectoid decomposition in the Ru-containing γ-TiAl alloys",

abstract = "A eutectoid decomposition of β → τ1 + γ was revealed in the Ru-containing γ-TiAl alloys by means of in-situ synchrotron radiation observation. The lamellar products formed by cooperative growth was observed after Ar quenching and evolved into non-lamellar morphology with the cooling rate decreasing. The lamellar eutectoid nodulus either precipitated attaching to γ phase or directly nucleated in parent β phase. The approximate eutectoid composition is 39.03%Ti, 50.25%Al and 10.71%Ru. The τ1 product in one nodulus processes the same crystallographic orientation but unclear orientation relationship with γ product. In addition, the diffusion-controlled eutectoid decomposition is quite sluggish because of the slow diffusion rate of Ru atom.",

keywords = "Eutectoid decomposition, Intermetallic alloys and compounds, Microstructure, Phase transformation, X-ray techniques",

author = "Yulun Wu and Rui Hu and Jieren Yang and Zitong Gao",

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doi = "10.1016/j.matlet.2021.130762",

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T1 - A novel β eutectoid decomposition in the Ru-containing γ-TiAl alloys

AU - Wu, Yulun

AU - Hu, Rui

AU - Yang, Jieren

AU - Gao, Zitong

PY - 2021/12/15

Y1 - 2021/12/15

N2 - A eutectoid decomposition of β → τ1 + γ was revealed in the Ru-containing γ-TiAl alloys by means of in-situ synchrotron radiation observation. The lamellar products formed by cooperative growth was observed after Ar quenching and evolved into non-lamellar morphology with the cooling rate decreasing. The lamellar eutectoid nodulus either precipitated attaching to γ phase or directly nucleated in parent β phase. The approximate eutectoid composition is 39.03%Ti, 50.25%Al and 10.71%Ru. The τ1 product in one nodulus processes the same crystallographic orientation but unclear orientation relationship with γ product. In addition, the diffusion-controlled eutectoid decomposition is quite sluggish because of the slow diffusion rate of Ru atom.

AB - A eutectoid decomposition of β → τ1 + γ was revealed in the Ru-containing γ-TiAl alloys by means of in-situ synchrotron radiation observation. The lamellar products formed by cooperative growth was observed after Ar quenching and evolved into non-lamellar morphology with the cooling rate decreasing. The lamellar eutectoid nodulus either precipitated attaching to γ phase or directly nucleated in parent β phase. The approximate eutectoid composition is 39.03%Ti, 50.25%Al and 10.71%Ru. The τ1 product in one nodulus processes the same crystallographic orientation but unclear orientation relationship with γ product. In addition, the diffusion-controlled eutectoid decomposition is quite sluggish because of the slow diffusion rate of Ru atom.

KW - Eutectoid decomposition

KW - Intermetallic alloys and compounds

KW - Microstructure

KW - Phase transformation

KW - X-ray techniques

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DO - 10.1016/j.matlet.2021.130762

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VL - 305

JO - Materials Letters

JF - Materials Letters

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A novel β eutectoid decomposition in the Ru-containing γ-TiAl alloys

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Keywords

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