Microstructures and mechanical behavior of the bimetallic additively-manufactured structure (BAMS) of austenitic stainless steel and Inconel 625

Md R.U. Ahsan; Xuesong Fan; Gi Jeong Seo; Changwook Ji; Mark Noakes; Andrzej Nycz; Peter K. Liaw; Duck Bong Kim

doi:10.1016/j.jmst.2020.10.001

Microstructures and mechanical behavior of the bimetallic additively-manufactured structure (BAMS) of austenitic stainless steel and Inconel 625

Md R.U. Ahsan, Xuesong Fan, Gi Jeong Seo, Changwook Ji, Mark Noakes, Andrzej Nycz, Peter K. Liaw, Duck Bong Kim

Manufacturing Robotics and Control

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

58 Scopus citations

Abstract

Bimetallic additively manufactured structures (BAMSs) can replace traditionally-fabricated functionally-graded-components through fusion welding processes and can eliminate locally-deteriorated mechanical properties arising from post-processing. The present work fabricates a BAMS by sequentially depositing the austenitic stainless-steel and Inconel625 using a gas-metal-arc-welding (GMAW)-based wire + arc additive manufacturing (WAAM) system. Elemental mapping shows a smooth compositional transition at the interface without any segregation. Both materials being the face-center-cubic (FCC) austenite, the electron backscattered diffraction (EBSD) analysis of the interface shows the smooth and cross-interface-crystallographic growth of long-elongated grains in the <001> direction. The hardness values were within the range of 220–240 HV for both materials without a large deviation at the interface. Due to the controlled thermal history, mechanical testing yielded a consistent result with the ultimate tensile strength and elongation of 600 MPa and 40 %, respectively, with the failure location on the stainless-steel side. This study demonstrates that WAAM has the potential to fabricate BAMS with controlled properties.

Original language	English
Pages (from-to)	176-188
Number of pages	13
Journal	Journal of Materials Science and Technology
Volume	74
DOIs	https://doi.org/10.1016/j.jmst.2020.10.001
State	Published - May 30 2021

Funding

The authors of this paper appreciate the continuous support provided by the Center for Manufacturing Research (CMR) and the Department of Manufacturing and Engineering Technology at Tennessee Technological University . This study has been conducted with the support of the Korea Institute of Industrial Technology as a project on the development of metal 3D printing materials and process optimization technology for medium- and large-sized transportation part mold manufacturing (KITECH JE200008). The authors of this paper appreciate the continuous support provided by the Center for Manufacturing Research (CMR) and the Department of Manufacturing and Engineering Technology at Tennessee Technological University. This study has been conducted with the support of the Korea Institute of Industrial Technology as a project on the development of metal 3D printing materials and process optimization technology for medium- and large-sized transportation part mold manufacturing (KITECH JE200008).

Funders	Funder number
Center for Manufacturing Research
Department of Manufacturing and Engineering Technology at Tennessee Technological University
Korea Institute of Industrial Technology	KITECH JE200008
Korea Institute of Industrial Technology

Keywords

Additive manufacturing
BAMS
Functionally-graded structures
Mechanical properties
Microstructures
WAAM

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jmst.2020.10.001

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title = "Microstructures and mechanical behavior of the bimetallic additively-manufactured structure (BAMS) of austenitic stainless steel and Inconel 625",

abstract = "Bimetallic additively manufactured structures (BAMSs) can replace traditionally-fabricated functionally-graded-components through fusion welding processes and can eliminate locally-deteriorated mechanical properties arising from post-processing. The present work fabricates a BAMS by sequentially depositing the austenitic stainless-steel and Inconel625 using a gas-metal-arc-welding (GMAW)-based wire + arc additive manufacturing (WAAM) system. Elemental mapping shows a smooth compositional transition at the interface without any segregation. Both materials being the face-center-cubic (FCC) austenite, the electron backscattered diffraction (EBSD) analysis of the interface shows the smooth and cross-interface-crystallographic growth of long-elongated grains in the <001> direction. The hardness values were within the range of 220–240 HV for both materials without a large deviation at the interface. Due to the controlled thermal history, mechanical testing yielded a consistent result with the ultimate tensile strength and elongation of 600 MPa and 40 %, respectively, with the failure location on the stainless-steel side. This study demonstrates that WAAM has the potential to fabricate BAMS with controlled properties.",

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AU - Ahsan, Md R.U.

AU - Fan, Xuesong

AU - Seo, Gi Jeong

AU - Ji, Changwook

AU - Noakes, Mark

AU - Nycz, Andrzej

AU - Liaw, Peter K.

AU - Kim, Duck Bong

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N2 - Bimetallic additively manufactured structures (BAMSs) can replace traditionally-fabricated functionally-graded-components through fusion welding processes and can eliminate locally-deteriorated mechanical properties arising from post-processing. The present work fabricates a BAMS by sequentially depositing the austenitic stainless-steel and Inconel625 using a gas-metal-arc-welding (GMAW)-based wire + arc additive manufacturing (WAAM) system. Elemental mapping shows a smooth compositional transition at the interface without any segregation. Both materials being the face-center-cubic (FCC) austenite, the electron backscattered diffraction (EBSD) analysis of the interface shows the smooth and cross-interface-crystallographic growth of long-elongated grains in the <001> direction. The hardness values were within the range of 220–240 HV for both materials without a large deviation at the interface. Due to the controlled thermal history, mechanical testing yielded a consistent result with the ultimate tensile strength and elongation of 600 MPa and 40 %, respectively, with the failure location on the stainless-steel side. This study demonstrates that WAAM has the potential to fabricate BAMS with controlled properties.

AB - Bimetallic additively manufactured structures (BAMSs) can replace traditionally-fabricated functionally-graded-components through fusion welding processes and can eliminate locally-deteriorated mechanical properties arising from post-processing. The present work fabricates a BAMS by sequentially depositing the austenitic stainless-steel and Inconel625 using a gas-metal-arc-welding (GMAW)-based wire + arc additive manufacturing (WAAM) system. Elemental mapping shows a smooth compositional transition at the interface without any segregation. Both materials being the face-center-cubic (FCC) austenite, the electron backscattered diffraction (EBSD) analysis of the interface shows the smooth and cross-interface-crystallographic growth of long-elongated grains in the <001> direction. The hardness values were within the range of 220–240 HV for both materials without a large deviation at the interface. Due to the controlled thermal history, mechanical testing yielded a consistent result with the ultimate tensile strength and elongation of 600 MPa and 40 %, respectively, with the failure location on the stainless-steel side. This study demonstrates that WAAM has the potential to fabricate BAMS with controlled properties.

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Microstructures and mechanical behavior of the bimetallic additively-manufactured structure (BAMS) of austenitic stainless steel and Inconel 625

Abstract

Funding

Keywords

UN SDGs

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