Analysis of ductile fracture obtained by charpy impact test of a steel structure created by robot-assisted GMAW-based additive manufacturing

Ali Waqas; Xiansheng Qin; Jiangtao Xiong; Chen Zheng; Hongbo Wang

doi:10.3390/met9111208

Analysis of ductile fracture obtained by charpy impact test of a steel structure created by robot-assisted GMAW-based additive manufacturing

Ali Waqas, Xiansheng Qin, Jiangtao Xiong, Chen Zheng, Hongbo Wang

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

23 Scopus citations

Abstract

In this study, gas metal arc welding (GMAW) was used to construct a thin wall structure in a layer-by-layer fashion using an AWS ER70S-6 electrode wire with the help of a robot. The Charpy impact test was performed after extracting samples in directions both parallel and perpendicular to the deposition direction. In this study, multiple factors related to the resulting absorbed energy have been discussed. Despite being a layered structure, homogeneous behavior with acceptable deviation was observed in the microstructure, hardness, and fracture toughness of the structure in both directions. The fracture is extremely ductile with a dimpled fibrous surface and secondary cracks. An estimate for fracture toughness based on Charpy impact absorbed energy is also given.

Original language	English
Article number	1208
Journal	Metals
Volume	9
Issue number	11
DOIs	https://doi.org/10.3390/met9111208
State	Published - Nov 2019

Keywords

Additive manufacturing
Charpy impact test
GMAW
Secondary cracks

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title = "Analysis of ductile fracture obtained by charpy impact test of a steel structure created by robot-assisted GMAW-based additive manufacturing",

abstract = "In this study, gas metal arc welding (GMAW) was used to construct a thin wall structure in a layer-by-layer fashion using an AWS ER70S-6 electrode wire with the help of a robot. The Charpy impact test was performed after extracting samples in directions both parallel and perpendicular to the deposition direction. In this study, multiple factors related to the resulting absorbed energy have been discussed. Despite being a layered structure, homogeneous behavior with acceptable deviation was observed in the microstructure, hardness, and fracture toughness of the structure in both directions. The fracture is extremely ductile with a dimpled fibrous surface and secondary cracks. An estimate for fracture toughness based on Charpy impact absorbed energy is also given.",

keywords = "Additive manufacturing, Charpy impact test, GMAW, Secondary cracks",

author = "Ali Waqas and Xiansheng Qin and Jiangtao Xiong and Chen Zheng and Hongbo Wang",

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T1 - Analysis of ductile fracture obtained by charpy impact test of a steel structure created by robot-assisted GMAW-based additive manufacturing

AU - Waqas, Ali

AU - Qin, Xiansheng

AU - Xiong, Jiangtao

AU - Zheng, Chen

AU - Wang, Hongbo

PY - 2019/11

Y1 - 2019/11

N2 - In this study, gas metal arc welding (GMAW) was used to construct a thin wall structure in a layer-by-layer fashion using an AWS ER70S-6 electrode wire with the help of a robot. The Charpy impact test was performed after extracting samples in directions both parallel and perpendicular to the deposition direction. In this study, multiple factors related to the resulting absorbed energy have been discussed. Despite being a layered structure, homogeneous behavior with acceptable deviation was observed in the microstructure, hardness, and fracture toughness of the structure in both directions. The fracture is extremely ductile with a dimpled fibrous surface and secondary cracks. An estimate for fracture toughness based on Charpy impact absorbed energy is also given.

AB - In this study, gas metal arc welding (GMAW) was used to construct a thin wall structure in a layer-by-layer fashion using an AWS ER70S-6 electrode wire with the help of a robot. The Charpy impact test was performed after extracting samples in directions both parallel and perpendicular to the deposition direction. In this study, multiple factors related to the resulting absorbed energy have been discussed. Despite being a layered structure, homogeneous behavior with acceptable deviation was observed in the microstructure, hardness, and fracture toughness of the structure in both directions. The fracture is extremely ductile with a dimpled fibrous surface and secondary cracks. An estimate for fracture toughness based on Charpy impact absorbed energy is also given.

KW - Additive manufacturing

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KW - Secondary cracks

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Analysis of ductile fracture obtained by charpy impact test of a steel structure created by robot-assisted GMAW-based additive manufacturing

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