Effect of welding parameters on microstructure and tensile properties of CA-TIG welded AMS-5596 grade thin high temperature alloy sheets for gas turbine engine applications
This paper presents the influence of Constricted Arc TIG (CA-TIG) welding parameters specifically Main Current (MC), Arc Constriction Current (ACC), ACC Frequency (ACCF) and Constricted Arc Traverse Speed (CATS) on weld bead, microstructure and tensile properties of Superalloy 718 joints. The mechan...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-05-01
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| Series: | Advances in Industrial and Manufacturing Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666912921000052 |
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| author | Tushar Sonar Visvalingam Balasubramanian Sudersanan Malarvizhi Thiruvenkatam Venkateswaran Dhenuvakonda Sivakumar |
| author_facet | Tushar Sonar Visvalingam Balasubramanian Sudersanan Malarvizhi Thiruvenkatam Venkateswaran Dhenuvakonda Sivakumar |
| author_sort | Tushar Sonar |
| collection | DOAJ |
| description | This paper presents the influence of Constricted Arc TIG (CA-TIG) welding parameters specifically Main Current (MC), Arc Constriction Current (ACC), ACC Frequency (ACCF) and Constricted Arc Traverse Speed (CATS) on weld bead, microstructure and tensile properties of Superalloy 718 joints. The mechanisms responsible for microstructural modification and consequential influence on tensile properties of joints are discussed in brief. The results showed that MC and CATS extend predominant influence on the weld bead geometrical features, growth of dendrites, volume % and morphology of laves precipitates in fusion zone (FZ) and tensile properties of Superalloy 718 joints than ACC and ACCF. The tensile properties of joints decrease at higher levels of MC (80 A), ACC (60 A) and ACCF (20 kHz) due to the high heat input which supresses the refinement of dendritic FZ microstructure. The tensile properties of joints increase at incremental levels of CATS due to the reduced heat input leading to the refinement of dendritic FZ microstructure. However, the joints exhibit poor tensile properties at higher level of CATS (80 mm/min) due to the insufficient heat input leading to partial penetration of joints. The joints made using MC of 65 A, ACC of 50 A, ACCF of 4 kHz and CATS of 60 mm/min yielded 99.20% joint efficiency and 27.93% ductility which is much higher than TIG welding process. It is attributed to the refinement of FZ dendritic structure and development of finer laves precipitates by virtue of constricted arc and high frequency pulsation of ACC. |
| first_indexed | 2024-12-17T22:50:56Z |
| format | Article |
| id | doaj.art-d8a3bddf92d14bc09153d7dc1d114b14 |
| institution | Directory Open Access Journal |
| issn | 2666-9129 |
| language | English |
| last_indexed | 2024-12-17T22:50:56Z |
| publishDate | 2021-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Advances in Industrial and Manufacturing Engineering |
| spelling | doaj.art-d8a3bddf92d14bc09153d7dc1d114b142022-12-21T21:29:40ZengElsevierAdvances in Industrial and Manufacturing Engineering2666-91292021-05-012100035Effect of welding parameters on microstructure and tensile properties of CA-TIG welded AMS-5596 grade thin high temperature alloy sheets for gas turbine engine applicationsTushar Sonar0Visvalingam Balasubramanian1Sudersanan Malarvizhi2Thiruvenkatam Venkateswaran3Dhenuvakonda Sivakumar4Centre for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar, 608002, Tamil Nadu state, India; Corresponding author.Centre for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar, 608002, Tamil Nadu state, IndiaCentre for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar, 608002, Tamil Nadu state, IndiaHeat Treatment and Welding Metallurgy Division (HWMD), Materials and Metallurgy Group (MMG), Vikram Sarabhai Space Centre (VSSC), ISRO, Trivandrum, 695022, Kerala state, IndiaHeat Treatment and Welding Metallurgy Division (HWMD), Materials and Metallurgy Group (MMG), Vikram Sarabhai Space Centre (VSSC), ISRO, Trivandrum, 695022, Kerala state, IndiaThis paper presents the influence of Constricted Arc TIG (CA-TIG) welding parameters specifically Main Current (MC), Arc Constriction Current (ACC), ACC Frequency (ACCF) and Constricted Arc Traverse Speed (CATS) on weld bead, microstructure and tensile properties of Superalloy 718 joints. The mechanisms responsible for microstructural modification and consequential influence on tensile properties of joints are discussed in brief. The results showed that MC and CATS extend predominant influence on the weld bead geometrical features, growth of dendrites, volume % and morphology of laves precipitates in fusion zone (FZ) and tensile properties of Superalloy 718 joints than ACC and ACCF. The tensile properties of joints decrease at higher levels of MC (80 A), ACC (60 A) and ACCF (20 kHz) due to the high heat input which supresses the refinement of dendritic FZ microstructure. The tensile properties of joints increase at incremental levels of CATS due to the reduced heat input leading to the refinement of dendritic FZ microstructure. However, the joints exhibit poor tensile properties at higher level of CATS (80 mm/min) due to the insufficient heat input leading to partial penetration of joints. The joints made using MC of 65 A, ACC of 50 A, ACCF of 4 kHz and CATS of 60 mm/min yielded 99.20% joint efficiency and 27.93% ductility which is much higher than TIG welding process. It is attributed to the refinement of FZ dendritic structure and development of finer laves precipitates by virtue of constricted arc and high frequency pulsation of ACC.http://www.sciencedirect.com/science/article/pii/S2666912921000052CA-TIG weldingSuperalloy 718MicrostructureTensile propertiesLaves precipitates |
| spellingShingle | Tushar Sonar Visvalingam Balasubramanian Sudersanan Malarvizhi Thiruvenkatam Venkateswaran Dhenuvakonda Sivakumar Effect of welding parameters on microstructure and tensile properties of CA-TIG welded AMS-5596 grade thin high temperature alloy sheets for gas turbine engine applications Advances in Industrial and Manufacturing Engineering CA-TIG welding Superalloy 718 Microstructure Tensile properties Laves precipitates |
| title | Effect of welding parameters on microstructure and tensile properties of CA-TIG welded AMS-5596 grade thin high temperature alloy sheets for gas turbine engine applications |
| title_full | Effect of welding parameters on microstructure and tensile properties of CA-TIG welded AMS-5596 grade thin high temperature alloy sheets for gas turbine engine applications |
| title_fullStr | Effect of welding parameters on microstructure and tensile properties of CA-TIG welded AMS-5596 grade thin high temperature alloy sheets for gas turbine engine applications |
| title_full_unstemmed | Effect of welding parameters on microstructure and tensile properties of CA-TIG welded AMS-5596 grade thin high temperature alloy sheets for gas turbine engine applications |
| title_short | Effect of welding parameters on microstructure and tensile properties of CA-TIG welded AMS-5596 grade thin high temperature alloy sheets for gas turbine engine applications |
| title_sort | effect of welding parameters on microstructure and tensile properties of ca tig welded ams 5596 grade thin high temperature alloy sheets for gas turbine engine applications |
| topic | CA-TIG welding Superalloy 718 Microstructure Tensile properties Laves precipitates |
| url | http://www.sciencedirect.com/science/article/pii/S2666912921000052 |
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