Multi-step heat treatment design for nano-scale lamellar structures of a cast Ti-45Al-8.5Nb-(W, B, Y) alloy

Fengming Qiang; Hongchao Kou; Guang Yang; Bin Tang; Jinshan Li

doi:10.1016/j.intermet.2016.09.006

Multi-step heat treatment design for nano-scale lamellar structures of a cast Ti-45Al-8.5Nb-(W, B, Y) alloy

Fengming Qiang
, Hongchao Kou
, Guang Yang
, Bin Tang
, Jinshan Li

材料学院

Northwestern Polytechnical University Xian

科研成果: 期刊稿件 › 文章 › 同行评审

20 引用（Scopus）

摘要

A multi-step heat treatment is proposed to optimize the lamellar structure of as-cast high Nb containing TiAl alloys. The β-segregation is removed effectively after the first two step heat treatment, a short-time holding within β single phase field then annealing in α+β phase field. During the third step heat treatment, a subsequent low-temperature aging, new γ lamellae precipitate by the means of isolated nucleation or twin-related nucleation. After the proposed multi-step heat treatment, the alloy presents nano-scaled lamellar structure with the colony size about 140 μm.

源语言	英语
页（从-至）	35-40
页数	6
期刊	Intermetallics
卷	79
DOI	https://doi.org/10.1016/j.intermet.2016.09.006
出版状态	已出版 - 1 12月 2016

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10.1016/j.intermet.2016.09.006

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title = "Multi-step heat treatment design for nano-scale lamellar structures of a cast Ti-45Al-8.5Nb-(W, B, Y) alloy",

abstract = "A multi-step heat treatment is proposed to optimize the lamellar structure of as-cast high Nb containing TiAl alloys. The β-segregation is removed effectively after the first two step heat treatment, a short-time holding within β single phase field then annealing in α+β phase field. During the third step heat treatment, a subsequent low-temperature aging, new γ lamellae precipitate by the means of isolated nucleation or twin-related nucleation. After the proposed multi-step heat treatment, the alloy presents nano-scaled lamellar structure with the colony size about 140 μm.",

keywords = "Heat treatment, Lamellar structure, Phase transformation, Segregation, Titanium aluminides",

author = "Fengming Qiang and Hongchao Kou and Guang Yang and Bin Tang and Jinshan Li",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd",

year = "2016",

month = dec,

day = "1",

doi = "10.1016/j.intermet.2016.09.006",

language = "英语",

volume = "79",

pages = "35--40",

journal = "Intermetallics",

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TY - JOUR

T1 - Multi-step heat treatment design for nano-scale lamellar structures of a cast Ti-45Al-8.5Nb-(W, B, Y) alloy

AU - Qiang, Fengming

AU - Kou, Hongchao

AU - Yang, Guang

AU - Tang, Bin

AU - Li, Jinshan

PY - 2016/12/1

Y1 - 2016/12/1

N2 - A multi-step heat treatment is proposed to optimize the lamellar structure of as-cast high Nb containing TiAl alloys. The β-segregation is removed effectively after the first two step heat treatment, a short-time holding within β single phase field then annealing in α+β phase field. During the third step heat treatment, a subsequent low-temperature aging, new γ lamellae precipitate by the means of isolated nucleation or twin-related nucleation. After the proposed multi-step heat treatment, the alloy presents nano-scaled lamellar structure with the colony size about 140 μm.

AB - A multi-step heat treatment is proposed to optimize the lamellar structure of as-cast high Nb containing TiAl alloys. The β-segregation is removed effectively after the first two step heat treatment, a short-time holding within β single phase field then annealing in α+β phase field. During the third step heat treatment, a subsequent low-temperature aging, new γ lamellae precipitate by the means of isolated nucleation or twin-related nucleation. After the proposed multi-step heat treatment, the alloy presents nano-scaled lamellar structure with the colony size about 140 μm.

KW - Heat treatment

KW - Lamellar structure

KW - Phase transformation

KW - Segregation

KW - Titanium aluminides

UR - https://www.scopus.com/pages/publications/84988557047

U2 - 10.1016/j.intermet.2016.09.006

DO - 10.1016/j.intermet.2016.09.006

M3 - 文章

AN - SCOPUS:84988557047

SN - 0966-9795

VL - 79

SP - 35

EP - 40

JO - Intermetallics

JF - Intermetallics

ER -

Multi-step heat treatment design for nano-scale lamellar structures of a cast Ti-45Al-8.5Nb-(W, B, Y) alloy

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