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

^*Corresponding author for this work

School of Materials Science and Engineering

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

7 Scopus citations

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.

Original language	English
Pages (from-to)	406-409
Number of pages	4
Journal	Materials Letters
Volume	60
Issue number	3
DOIs	https://doi.org/10.1016/j.matlet.2005.09.001
State	Published - Feb 2006

Keywords

Hardness
Heat treatment
Laser processing
Microstructure
TiAl based alloy

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10.1016/j.matlet.2005.09.001

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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",

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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

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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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Keywords

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