Microstructural investigations for laser welded joints of Ti-22Al-25Nb alloy sheets upon large deformation at elevated temperature

Beibei Kong; Gang Liu; Dongjun Wang; Kehuan Wang; Shijian Yuan

doi:10.1016/j.matdes.2015.11.007

Microstructural investigations for laser welded joints of Ti-22Al-25Nb alloy sheets upon large deformation at elevated temperature

Beibei Kong
, Gang Liu^*
, Dongjun Wang
, Kehuan Wang
, Shijian Yuan

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology

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

40 Scopus citations

Abstract

In order to provide reference for the gas forming of Ti-22Al-25Nb alloy tube blanks with a laser beam welded joint, microstructure and tensile deformation behavior of the alloy with a joint were investigated using uniaxial tensile tests at 990°C, with a tensile speed of 0.016mm/s. Both of the samples with a longitudinal joint and a transverse joint were applied in the tensile tests. The longitudinal joint samples showed a better high temperature deformability than the transverse joint ones, which partly attributed to the decrease of α₂-phase grains along the β/B2-phase grain boundaries and more dynamic recovery and discontinuous dynamic recrystallization in the longitudinal joint. These results indicated that the laser welded joint could experience a large deformation at a proper temperature and strain rate, which was a potential method for the preparation of tube blanks for gas forming components.

Original language	English
Pages (from-to)	723-732
Number of pages	10
Journal	Materials and Design
Volume	90
DOIs	https://doi.org/10.1016/j.matdes.2015.11.007
State	Published - 2016

Keywords

Laser beam welding
Lattice distortion
Recovery
Texture
Ti-22Al-25Nb

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10.1016/j.matdes.2015.11.007

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@article{0c0bbb33cf0f4d8c9d0f5ed813fe1c50,

title = "Microstructural investigations for laser welded joints of Ti-22Al-25Nb alloy sheets upon large deformation at elevated temperature",

abstract = "In order to provide reference for the gas forming of Ti-22Al-25Nb alloy tube blanks with a laser beam welded joint, microstructure and tensile deformation behavior of the alloy with a joint were investigated using uniaxial tensile tests at 990°C, with a tensile speed of 0.016mm/s. Both of the samples with a longitudinal joint and a transverse joint were applied in the tensile tests. The longitudinal joint samples showed a better high temperature deformability than the transverse joint ones, which partly attributed to the decrease of α2-phase grains along the β/B2-phase grain boundaries and more dynamic recovery and discontinuous dynamic recrystallization in the longitudinal joint. These results indicated that the laser welded joint could experience a large deformation at a proper temperature and strain rate, which was a potential method for the preparation of tube blanks for gas forming components.",

keywords = "Laser beam welding, Lattice distortion, Recovery, Texture, Ti-22Al-25Nb",

author = "Beibei Kong and Gang Liu and Dongjun Wang and Kehuan Wang and Shijian Yuan",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

year = "2016",

doi = "10.1016/j.matdes.2015.11.007",

language = "英语",

volume = "90",

pages = "723--732",

journal = "Materials and Design",

issn = "0264-1275",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Microstructural investigations for laser welded joints of Ti-22Al-25Nb alloy sheets upon large deformation at elevated temperature

AU - Kong, Beibei

AU - Liu, Gang

AU - Wang, Dongjun

AU - Wang, Kehuan

AU - Yuan, Shijian

PY - 2016

Y1 - 2016

N2 - In order to provide reference for the gas forming of Ti-22Al-25Nb alloy tube blanks with a laser beam welded joint, microstructure and tensile deformation behavior of the alloy with a joint were investigated using uniaxial tensile tests at 990°C, with a tensile speed of 0.016mm/s. Both of the samples with a longitudinal joint and a transverse joint were applied in the tensile tests. The longitudinal joint samples showed a better high temperature deformability than the transverse joint ones, which partly attributed to the decrease of α2-phase grains along the β/B2-phase grain boundaries and more dynamic recovery and discontinuous dynamic recrystallization in the longitudinal joint. These results indicated that the laser welded joint could experience a large deformation at a proper temperature and strain rate, which was a potential method for the preparation of tube blanks for gas forming components.

AB - In order to provide reference for the gas forming of Ti-22Al-25Nb alloy tube blanks with a laser beam welded joint, microstructure and tensile deformation behavior of the alloy with a joint were investigated using uniaxial tensile tests at 990°C, with a tensile speed of 0.016mm/s. Both of the samples with a longitudinal joint and a transverse joint were applied in the tensile tests. The longitudinal joint samples showed a better high temperature deformability than the transverse joint ones, which partly attributed to the decrease of α2-phase grains along the β/B2-phase grain boundaries and more dynamic recovery and discontinuous dynamic recrystallization in the longitudinal joint. These results indicated that the laser welded joint could experience a large deformation at a proper temperature and strain rate, which was a potential method for the preparation of tube blanks for gas forming components.

KW - Laser beam welding

KW - Lattice distortion

KW - Recovery

KW - Texture

KW - Ti-22Al-25Nb

UR - https://www.scopus.com/pages/publications/84952359852

U2 - 10.1016/j.matdes.2015.11.007

DO - 10.1016/j.matdes.2015.11.007

M3 - 文章

AN - SCOPUS:84952359852

SN - 0264-1275

VL - 90

SP - 723

EP - 732

JO - Materials and Design

JF - Materials and Design

ER -

Microstructural investigations for laser welded joints of Ti-22Al-25Nb alloy sheets upon large deformation at elevated temperature

Abstract

Keywords

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