In situ and post-mortem characterizations of ultrasonic spot welded az31b and coated dual phase 590 steel joints

Jian Chen; Yong Chae Lim; Donovan Leonard; Hui Huang; Zhili Feng; Xin Sun

doi:10.3390/met10070899

In situ and post-mortem characterizations of ultrasonic spot welded az31b and coated dual phase 590 steel joints

Jian Chen, Yong Chae Lim, Donovan Leonard, Hui Huang, Zhili Feng, Xin Sun

Materials Joining

Oak Ridge National Laboratory

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

6 Scopus citations

Abstract

Ultrasonic spot welding using different welding conditions was applied to join dissimilar metals of galvanized DP590 steel and AZ31B magnesium sheets. In situ high-speed imaging, digital image correlation, and infrared thermography were utilized to quantitatively study the interfacial relative motion, surface indentation, and heat generation across the joint faying interface and the sheet/sonotrode interfaces under the welding condition of moderate welding power and short welding time. For welds made with high power and long welding time, lap shear tensile tests as well as fatigue tests were carried out. Different fracture modes were observed after the lap shear tensile tests and fatigue tests performed under different peak loads. Post-weld cross-sectional analysis with scanning electron microscopy coupled with energy dispersive X-Ray spectroscopy revealed the variation of morphology and chemical composition at the joint interface for welds made with different welding conditions.

Original language	English
Article number	899
Pages (from-to)	1-11
Number of pages	11
Journal	Metals
Volume	10
Issue number	7
DOIs	https://doi.org/10.3390/met10070899
State	Published - Jul 2020

Bibliographical note

Publisher Copyright:
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.

Funding

Acknowledgments: ORNL is managed by UT-Battelle, LLC for the U.S. Department of Energy under Contract DE-AC05-00OR22725. The authors would like to appreciate POSCO and U.S. Steel providing materials for the project. Funding: This research was sponsored by the US Department of Energy, Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office, under a prime contract with Oak Ridge National Laboratory (ORNL). This research was sponsored by the US Department of Energy, Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office, under a prime contract with Oak Ridge National Laboratory (ORNL).

Funders	Funder number
Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office
US Department of Energy
U.S. Department of Energy	DE-AC05-00OR22725
Office of Energy Efficiency and Renewable Energy
Oak Ridge National Laboratory

Keywords

Dual phase steel
Fatigue
Interfacial phenomena
Lap shear
Magnesium alloy
Ultrasonic spot welding

Access to Document

10.3390/met10070899

Cite this

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title = "In situ and post-mortem characterizations of ultrasonic spot welded az31b and coated dual phase 590 steel joints",

abstract = "Ultrasonic spot welding using different welding conditions was applied to join dissimilar metals of galvanized DP590 steel and AZ31B magnesium sheets. In situ high-speed imaging, digital image correlation, and infrared thermography were utilized to quantitatively study the interfacial relative motion, surface indentation, and heat generation across the joint faying interface and the sheet/sonotrode interfaces under the welding condition of moderate welding power and short welding time. For welds made with high power and long welding time, lap shear tensile tests as well as fatigue tests were carried out. Different fracture modes were observed after the lap shear tensile tests and fatigue tests performed under different peak loads. Post-weld cross-sectional analysis with scanning electron microscopy coupled with energy dispersive X-Ray spectroscopy revealed the variation of morphology and chemical composition at the joint interface for welds made with different welding conditions.",

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AU - Chen, Jian

AU - Lim, Yong Chae

AU - Leonard, Donovan

AU - Huang, Hui

AU - Feng, Zhili

AU - Sun, Xin

PY - 2020/7

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N2 - Ultrasonic spot welding using different welding conditions was applied to join dissimilar metals of galvanized DP590 steel and AZ31B magnesium sheets. In situ high-speed imaging, digital image correlation, and infrared thermography were utilized to quantitatively study the interfacial relative motion, surface indentation, and heat generation across the joint faying interface and the sheet/sonotrode interfaces under the welding condition of moderate welding power and short welding time. For welds made with high power and long welding time, lap shear tensile tests as well as fatigue tests were carried out. Different fracture modes were observed after the lap shear tensile tests and fatigue tests performed under different peak loads. Post-weld cross-sectional analysis with scanning electron microscopy coupled with energy dispersive X-Ray spectroscopy revealed the variation of morphology and chemical composition at the joint interface for welds made with different welding conditions.

AB - Ultrasonic spot welding using different welding conditions was applied to join dissimilar metals of galvanized DP590 steel and AZ31B magnesium sheets. In situ high-speed imaging, digital image correlation, and infrared thermography were utilized to quantitatively study the interfacial relative motion, surface indentation, and heat generation across the joint faying interface and the sheet/sonotrode interfaces under the welding condition of moderate welding power and short welding time. For welds made with high power and long welding time, lap shear tensile tests as well as fatigue tests were carried out. Different fracture modes were observed after the lap shear tensile tests and fatigue tests performed under different peak loads. Post-weld cross-sectional analysis with scanning electron microscopy coupled with energy dispersive X-Ray spectroscopy revealed the variation of morphology and chemical composition at the joint interface for welds made with different welding conditions.

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KW - Fatigue

KW - Interfacial phenomena

KW - Lap shear

KW - Magnesium alloy

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In situ and post-mortem characterizations of ultrasonic spot welded az31b and coated dual phase 590 steel joints

Abstract

Bibliographical note

Funding

Keywords

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