Dendritic structural transformation of laser surface remelted γ-TiAl based alloy during post-heat treatment

G. Q. Wu; G. X. Luo; Z. Huang; Z. J. Ruan

doi:10.1016/j.matlet.2005.09.001

Dendritic structural transformation of laser surface remelted γ-TiAl based alloy during post-heat treatment

G. Q. Wu^*
, G. X. Luo
, Z. Huang
, Z. J. Ruan

^*此作品的通讯作者

材料科学与工程学院

Huazhong University of Science and Technology
Beihang University

科研成果: 期刊稿件 › 文章 › 同行评审

7 引用（Scopus）

摘要

Laser surface remelting followed by heat treatments at 1000 °C for different time was carried out on γ-TiAl based alloy. The characteristics of structural transformation of laser surface remelted γ-TiAl based alloy were investigated by high-temperature microscope, TEM and XRD. The results show that the phase transformation (α₂ → γ) in TiAl alloy occurred at the earlier stage of post-heat treatment, and the dendritic structure transformed firstly at the intergranular, then expanded into the transgranular, finally changed to ultrafine equiaxed grain structure, at the same time, micro-hardness of laser-surface remelted γ-TiAl based alloy had the corresponding change with the structural transformation.

源语言	英语
页（从-至）	406-409
页数	4
期刊	Materials Letters
卷	60
期	3
DOI	https://doi.org/10.1016/j.matlet.2005.09.001
出版状态	已出版 - 2月 2006

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10.1016/j.matlet.2005.09.001

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@article{bb6ea0c48f7c4e398a8be74b3eb6aa8d,

title = "Dendritic structural transformation of laser surface remelted γ-TiAl based alloy during post-heat treatment",

abstract = "Laser surface remelting followed by heat treatments at 1000 °C for different time was carried out on γ-TiAl based alloy. The characteristics of structural transformation of laser surface remelted γ-TiAl based alloy were investigated by high-temperature microscope, TEM and XRD. The results show that the phase transformation (α2 → γ) in TiAl alloy occurred at the earlier stage of post-heat treatment, and the dendritic structure transformed firstly at the intergranular, then expanded into the transgranular, finally changed to ultrafine equiaxed grain structure, at the same time, micro-hardness of laser-surface remelted γ-TiAl based alloy had the corresponding change with the structural transformation.",

keywords = "Hardness, Heat treatment, Laser processing, Microstructure, TiAl based alloy",

author = "Wu, \{G. Q.\} and Luo, \{G. X.\} and Z. Huang and Ruan, \{Z. J.\}",

year = "2006",

month = feb,

doi = "10.1016/j.matlet.2005.09.001",

language = "英语",

volume = "60",

pages = "406--409",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

number = "3",

}

TY - JOUR

T1 - Dendritic structural transformation of laser surface remelted γ-TiAl based alloy during post-heat treatment

AU - Wu, G. Q.

AU - Luo, G. X.

AU - Huang, Z.

AU - Ruan, Z. J.

PY - 2006/2

Y1 - 2006/2

N2 - Laser surface remelting followed by heat treatments at 1000 °C for different time was carried out on γ-TiAl based alloy. The characteristics of structural transformation of laser surface remelted γ-TiAl based alloy were investigated by high-temperature microscope, TEM and XRD. The results show that the phase transformation (α2 → γ) in TiAl alloy occurred at the earlier stage of post-heat treatment, and the dendritic structure transformed firstly at the intergranular, then expanded into the transgranular, finally changed to ultrafine equiaxed grain structure, at the same time, micro-hardness of laser-surface remelted γ-TiAl based alloy had the corresponding change with the structural transformation.

AB - Laser surface remelting followed by heat treatments at 1000 °C for different time was carried out on γ-TiAl based alloy. The characteristics of structural transformation of laser surface remelted γ-TiAl based alloy were investigated by high-temperature microscope, TEM and XRD. The results show that the phase transformation (α2 → γ) in TiAl alloy occurred at the earlier stage of post-heat treatment, and the dendritic structure transformed firstly at the intergranular, then expanded into the transgranular, finally changed to ultrafine equiaxed grain structure, at the same time, micro-hardness of laser-surface remelted γ-TiAl based alloy had the corresponding change with the structural transformation.

KW - Hardness

KW - Heat treatment

KW - Laser processing

KW - Microstructure

KW - TiAl based alloy

UR - https://www.scopus.com/pages/publications/27844468098

U2 - 10.1016/j.matlet.2005.09.001

DO - 10.1016/j.matlet.2005.09.001

M3 - 文章

AN - SCOPUS:27844468098

SN - 0167-577X

VL - 60

SP - 406

EP - 409

JO - Materials Letters

JF - Materials Letters

IS - 3

ER -

Dendritic structural transformation of laser surface remelted γ-TiAl based alloy during post-heat treatment

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