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Investigation on the impact of parameters of FSW on microstructural transitions and the strength of CDA 101 joints

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    P. Sevvel obtained his PhD in Mechanical Engineering in 2016 and M.Tech Degree in Industrial Engineering in 2005. He has 17 years of experience. He is working as a Professor, in Mechanical Engineering Department in S.A. Engineering College. He has published 40 research papers in various SCI and Scopus indexed journals.

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Published/Copyright: December 10, 2024
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Practical Metallography
From the journal Practical Metallography Volume 62 Issue 1

Abstact

An experimental endeavor was made to fathom the influence of employed parameters on the microstructural transitions and tensile strength of friction stir welded (FSW) joints of CDA 101 Cu alloy. This investigation also aimed at providing insight into the interdependency between the mechanical properties and transformed microstructures. Flat plates of CDA 101 alloy were joined using the FSW process by employing four distinctive speeds of traverse and rotation. Employment of 1500 rpm in combination with 25 mm/min proved to be an exceptional combination, as the zone of nugget of this joint exhibited very fine sized, dynamically recrystallized, exquisite grain structures distributed consistently in equal spaces. A maximum tensile strength of 205.79 MPa was exhibited by this joint. It was confirmed that the employed speed of rotation of 1500 rpm was responsible for the generation of the ideal amount of frictional heat and the employed speed of traverse of 25 mm/min played a vital role in permitting the tool to traverse over the regions of the line of joint for a sufficient time period. Moreover, scanning electron microscopy fractography revealed that this joint exhibited smaller voids and has failed in a purely dimple mode of fracture, indicating the higher ductility of this joint.

Kurzfassung

Es wurde versucht, zu ergründen, wie sich die gewählten Parameter auf die Gefügeveränderungen und die Zugfestigkeit rührreibgeschweißter Verbindungen aus der Cu-Legierung CDA 101 auswirken. Ziel der Untersuchung war es außerdem, Einblicke in die Wechselwirkungen zwischen mechanischen Eigenschaften und umgewandeltem Gefüge zu gewinnen. Flache Platten aus der Legierung CDA 101 wurden im FSW-Verfahren (Friction Stir Welding, Rührreibschweißen) bei vier unterschiedlichen Vorschubgeschwindigkeiten und Drehzahlen gefügt. Eine Drehzahl von 1500 1/min in Kombination mit einem Vorschub von 25 mm/min erwies sich als ausgezeichnete Kombination: Der Bereich der Schweißlinse (Nugget) dieser Verbindung wies ein sehr feines, dynamisch rekristallisiertes, gleichmäßig verteiltes Korngefüge auf. Die Verbindung erreichte eine maximale Zugfestigkeit von 205,79 MPa. Es wurde gezeigt, dass die gewählte Drehzahl von 1500 1/min die optimale Menge Reibungswärme erzeugte und die gewählte Vorschubgeschwindigkeit von 25 mm/min entscheidend dazu beitrug, dass das Werkzeug ausreichend lange über die Bereiche der Verbindungslinie fahren konnte. Darüber hinaus zeigte eine Rasterelektronenmikroskop-Fraktografie das Vorhandensein kleinerer Hohlräume in der Verbindung, die durch einen reinen Verformungsbruch versagte, ein Hinweis auf die höhere Duktilität dieser Verbindung.

Keywords: Microstructural transitions; speed of traverse; CDA 101 alloy; friction stir welding; speed of rotation
Schlagwörter: mikrostrukturelle Veränderungen; Vorschubgeschwindigkeit; CDA 101-Legierung; Rührreibschweißen; Drehzahl

About the author

P. Sevvel

P. Sevvel obtained his PhD in Mechanical Engineering in 2016 and M.Tech Degree in Industrial Engineering in 2005. He has 17 years of experience. He is working as a Professor, in Mechanical Engineering Department in S.A. Engineering College. He has published 40 research papers in various SCI and Scopus indexed journals.

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Received: 2023-12-01
Accepted: 2024-04-08
Published Online: 2024-12-10
Published in Print: 2024-12-15

© 2024 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Contents
  2. Editorial
  3. Editorial
  4. Optimizing the design of the selective melt dispersion (SMD) process based on metallographic investigations of additively manufactured 316L steel samples
  5. Comparison of etchants for corrosion-resistant stainless steels in medical engineering
  6. Investigation on the impact of parameters of FSW on microstructural transitions and the strength of CDA 101 joints
  7. Failure Analysis
  8. Recommendations for the metallographic preparation of crack-like defects in PBF-LB/M additively manufactured alloy 625 builds
  9. Picture of the Month
  10. Picture of the Month
  11. People
  12. Cloeren Technology’s 20th anniversary
  13. News
  14. News
  15. Meeting Diary
  16. Meeting Diary
https://doi.org/10.1515/pm-2024-0095
Keywords for this article
Microstructural transitions; speed of traverse; CDA 101 alloy; friction stir welding; speed of rotation

Articles in the same Issue

  1. Contents
  2. Editorial
  3. Editorial
  4. Optimizing the design of the selective melt dispersion (SMD) process based on metallographic investigations of additively manufactured 316L steel samples
  5. Comparison of etchants for corrosion-resistant stainless steels in medical engineering
  6. Investigation on the impact of parameters of FSW on microstructural transitions and the strength of CDA 101 joints
  7. Failure Analysis
  8. Recommendations for the metallographic preparation of crack-like defects in PBF-LB/M additively manufactured alloy 625 builds
  9. Picture of the Month
  10. Picture of the Month
  11. People
  12. Cloeren Technology’s 20th anniversary
  13. News
  14. News
  15. Meeting Diary
  16. Meeting Diary
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