In-Situ SEM and EBSD Analysis on Plastic Behavior of Laser Beam Welding Ti-6Al-4V Alloy

Ning Dang; Lingyu Liu; Cyril Lavogiez; Eric Maire; Chaoli Ma; Lian Zhou

doi:10.7502/j.issn.1674-3962.2019.03.10

In-Situ SEM and EBSD Analysis on Plastic Behavior of Laser Beam Welding Ti-6Al-4V Alloy

Ning Dang, Lingyu Liu, Cyril Lavogiez, Eric Maire, Chaoli Ma, Lian Zhou

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

1 Scopus citations

Abstract

EBSD and in-situ SEM were used to study the plastic behavior of laser beam welding Ti-6Al-4V. Due to the high weld temperature(exceeding the β-transus) and high cooling rate, β→α' martensitic transformation occurs. Within the fusion zone, only acicular morphology exists, while in 1st heat affected zone(HAZ) and 2nd HAZ, these acicular laths globalize, which show an obvious microstructural gradient. The result of the in-situ plastic deformation shows the deformation can be divided into 2 stages. In the first stage of the deformation, either slipping or twinning can occur. It depends on whether the initial orientation can respect <120>//TA(tensile axis) by rotating the grains or not. While in the second stage, only slipping can be found.

Translated title of the contribution	激光焊接Ti-6Al-4V钛合金塑性行为的原位SEM/EBSD分析
Original language	English
Pages (from-to)	279-285
Number of pages	7
Journal	Materials China
Volume	38
Issue number	3
DOIs	https://doi.org/10.7502/j.issn.1674-3962.2019.03.10
State	Published - 1 Mar 2019
Externally published	Yes

Keywords

Crystallographic orientation
In-situ SEM
Laser beam welding
Plastic deformation
Ti-6Al-4V alloy

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10.7502/j.issn.1674-3962.2019.03.10

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title = "In-Situ SEM and EBSD Analysis on Plastic Behavior of Laser Beam Welding Ti-6Al-4V Alloy",

abstract = "EBSD and in-situ SEM were used to study the plastic behavior of laser beam welding Ti-6Al-4V. Due to the high weld temperature(exceeding the β-transus) and high cooling rate, β→α' martensitic transformation occurs. Within the fusion zone, only acicular morphology exists, while in 1st heat affected zone(HAZ) and 2nd HAZ, these acicular laths globalize, which show an obvious microstructural gradient. The result of the in-situ plastic deformation shows the deformation can be divided into 2 stages. In the first stage of the deformation, either slipping or twinning can occur. It depends on whether the initial orientation can respect <120>//TA(tensile axis) by rotating the grains or not. While in the second stage, only slipping can be found.",

keywords = "Crystallographic orientation, In-situ SEM, Laser beam welding, Plastic deformation, Ti-6Al-4V alloy",

author = "Ning Dang and Lingyu Liu and Cyril Lavogiez and Eric Maire and Chaoli Ma and Lian Zhou",

year = "2019",

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doi = "10.7502/j.issn.1674-3962.2019.03.10",

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T1 - In-Situ SEM and EBSD Analysis on Plastic Behavior of Laser Beam Welding Ti-6Al-4V Alloy

AU - Dang, Ning

AU - Liu, Lingyu

AU - Lavogiez, Cyril

AU - Maire, Eric

AU - Ma, Chaoli

AU - Zhou, Lian

PY - 2019/3/1

Y1 - 2019/3/1

N2 - EBSD and in-situ SEM were used to study the plastic behavior of laser beam welding Ti-6Al-4V. Due to the high weld temperature(exceeding the β-transus) and high cooling rate, β→α' martensitic transformation occurs. Within the fusion zone, only acicular morphology exists, while in 1st heat affected zone(HAZ) and 2nd HAZ, these acicular laths globalize, which show an obvious microstructural gradient. The result of the in-situ plastic deformation shows the deformation can be divided into 2 stages. In the first stage of the deformation, either slipping or twinning can occur. It depends on whether the initial orientation can respect <120>//TA(tensile axis) by rotating the grains or not. While in the second stage, only slipping can be found.

AB - EBSD and in-situ SEM were used to study the plastic behavior of laser beam welding Ti-6Al-4V. Due to the high weld temperature(exceeding the β-transus) and high cooling rate, β→α' martensitic transformation occurs. Within the fusion zone, only acicular morphology exists, while in 1st heat affected zone(HAZ) and 2nd HAZ, these acicular laths globalize, which show an obvious microstructural gradient. The result of the in-situ plastic deformation shows the deformation can be divided into 2 stages. In the first stage of the deformation, either slipping or twinning can occur. It depends on whether the initial orientation can respect <120>//TA(tensile axis) by rotating the grains or not. While in the second stage, only slipping can be found.

KW - Crystallographic orientation

KW - In-situ SEM

KW - Laser beam welding

KW - Plastic deformation

KW - Ti-6Al-4V alloy

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DO - 10.7502/j.issn.1674-3962.2019.03.10

M3 - 文章

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SN - 1674-3962

VL - 38

SP - 279

EP - 285

JO - Materials China

JF - Materials China

IS - 3

ER -

In-Situ SEM and EBSD Analysis on Plastic Behavior of Laser Beam Welding Ti-6Al-4V Alloy

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Keywords

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