PSI - Issue 56

ScienceDirect Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000–000 Available online at www.sciencedirect.com Procedia Structural Integrity 56 (2024) 65–70

www.elsevier.com/locate/procedia

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the SIRAMM23 organizers 10.1016/j.prostr.2024.02.038 2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the SIRAMM23 organizers 2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the SIRAMM23 organizers 1. Introduction Laser powder bed fusion (LPBF) technology emerged as one of the most widely used additively manufactured (AM) techniques that can be applied to most non-volatile metals. It is a layer-based deposition method using a laser to selectively melt successive layers of metal powder in an inert-gas-filled chamber [1-2]. The benefit of this process 1 * Corresponding author. Tel.: +91-9036624149; fax: NA. E-mail address: anandkumarait@gmail.com; anand.subramaniyan@iitjammu.ac.in 1 * Corresponding author. Tel.: +91-9036624149; fax: NA. E-mail address: anandkumarait@gmail.com; anand.subramaniyan@iitjammu.ac.in © 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the SIRAMM23 organizers Abstract The present work was conducted to determine the effect of welding as-printed selective laser melting samples and fabricated samples welded with stress-relieved conditions. The research aimed to study the influence of heat treatment on welding parameters and weldability. Additive manufacturing by selective laser melting can achieve near-net shape and complex structure. It has been widely used in manufacturing aerospace components, in the automobile sector and other fields. Ti6Al4V is the most commonly used and researched alloy in additive-manufactured alloys. The microstructure of Ti-6Al-4V is diverse and consists of acicular martensite α’ phase with prior β grains. The results showed the formation of α - phase around the β grains in the heat affected zone where the temperature reached above the T0 [<893º C], the β -phase recrystallization during the welding process. The primary α -phase develops and forms along the grain boundaries and was more prominent in the stress-relieved specimens. The microhardness decreases in the weld of stress relieved condition compared to weld as-printed condition. Abstract The present work was conducted to determine the effect of welding as-printed selective laser melting samples and fabricated samples welded with stress-relieved conditions. The research aimed to study the influence of heat treatment on welding parameters and weldability. Additive manufacturing by selective laser melting can achieve near-net shape and complex structure. It has been widely used in manufacturing aerospace components, in the automobile sector and other fields. Ti6Al4V is the most commonly used and researched alloy in additive-manufactured alloys. The microstructure of Ti-6Al-4V is diverse and consists of acicular martensite α’ phase with prior β grains. The results showed the formation of α - phase around the β grains in the heat affected zone where the temperature reached above the T0 [<893º C], the β -phase recrystallization during the welding process. The primary α -phase develops and forms along the grain boundaries and was more prominent in the stress-relieved specimens. The microhardness decreases in the weld of stress relieved condition compared to weld as-printed condition. Keywords: Ti-6Al-4V, laser powder bed fusion, electron beam welding, microstructure, microhardness 1. Introduction Laser powder bed fusion (LPBF) technology emerged as one of the most widely used additively manufactured (AM) techniques that can be applied to most non-volatile metals. It is a layer-based deposition method using a laser to selectively melt successive layers of metal powder in an inert-gas-filled chamber [1-2]. The benefit of this process www.elsevier.com/locate/procedia Structural Integrity and Reliability of Advanced Materials obtained through Additive Manufacturing (SIRAMM23) Influence of heat treatment on welding process of electron beam welded joint of Ti6Al4V parts manufactured via laser powder bed fusion Anand Kumar S 1 *, Damodran 2 , Randhir Kumar Singh 3 , R.K. Kumar 4 , S. Cyril Joseph Daniel 2 , Adarsh K. Hegde 5 , BK Nagesha 6 1 Additive Manufacturing Research Laboratory, Dept of Mechanical Eng., Indian Institute of Technology Jammu, Jammu - 181 221, India. 2 Department of Mechanical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai - 603110, India. 3 Dept. of Metallurgical & Materials Engineering, Malaviya National Institute of Technology Jaipur, Rajasthan-302017, India 4 Material Technology Division, Central Power Research Institute (CPRI), Bangalore 560080, India 5 Center for Sensors, Vision Technology and Controls, Central Manufacturing Technology Institute, Bengaluru – 560022, India 6 Gas Turbine Research Establishment, Defense Research and Development Organization, Karnataka, Bangalore- 560093, India Structural Integrity and Reliability of Advanced Materials obtained through Additive Manufacturing (SIRAMM23) Influence of heat treatment on welding process of electron beam welded joint of Ti6Al4V parts manufactured via laser powder bed fusion Anand Kumar S 1 *, Damodran 2 , Randhir Kumar Singh 3 , R.K. Kumar 4 , S. Cyril Joseph Daniel 2 , Adarsh K. Hegde 5 , BK Nagesha 6 1 Additive Manufacturing Research Laboratory, Dept of Mechanical Eng., Indian Institute of Technology Jammu, Jammu - 181 221, India. 2 Department of Mechanical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai - 603110, India. 3 Dept. of Metallurgical & Materials Engineering, Malaviya National Institute of Technology Jaipur, Rajasthan-302017, India 4 Material Technology Division, Central Power Research Institute (CPRI), Bangalore 560080, India 5 Center for Sensors, Vision Technology and Controls, Central Manufacturing Technology Institute, Bengaluru – 560022, India 6 Gas Turbine Research Establishment, Defense Research and Development Organization, Karnataka, Bangalore- 560093, India Keywords: Ti-6Al-4V, laser powder bed fusion, electron beam welding, microstructure, microhardness