Indian Welding Journal

Open Access Open Access  Restricted Access Subscription Access
Open Access Open Access Open Access  Restricted Access Restricted Access Subscription Access

Joint Characteristics of Cu-Ni Alloy Fabricated by GTAW and MPAW Processes: A Comparative Study


Affiliations
1 Department of Mechanical Engineering Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
     

   Subscribe/Renew Journal


The current work presents a comparative analysis of the joint behavior of Cu-Ni alloy weldments fabricated by Micro-Plasma Arc Welding (MPAW) and Gas Tungsten Arc Welding (GTAW) processes. The Cu-Ni alloy thin sheets are fabricated at different values of heat input (~40-135 J/mm) by MPAW and GTAW processes, respectively. Further, to evaluate their characteristics, joints are subjected to metallurgical, mechanical, and electrochemical testing. The joints fabricated with a higher magnitude of heat input resulted in deteriorated surface quality with a value of R ~ 6.13 µm. The increased surface roughness value of the joints resulted in a a higher corrosion rate (1.273 mm/year). A finer microstructural morphology is achieved for lower heat input condition. Accordingly, the weldment exhibited higher joint efficiency of ~91%.The prominent reason for achieving higher joint strength is related to the presence of lower secondary dendritic arm spacing (SDAS), which enhances the joint strength and ductility for the joints as compared to higher SDAS value. Further, the micro-fractography analysis reveals the presence of micro/macro-voids for high heat input, whereas the existence of numerous dimples of varying size and depth is observed for low heat input condition, implying the role of heat input of utmost importance.

Keywords

Heat Input, Surface Quality, Joint Strength, Fracture Analysis, Corrosion Behavior.
User
Subscription Login to verify subscription
Notifications
Font Size

  • Kou S (2003); Welding Metallurgy, N.J. USA, pp. 431-446.

  • Dwibedi S, Bag S (2022); Influence of process parameters on microstructural evolution, solidification mode, and impact strength in joining of stainless steel thin sheets, Adv. Mater. Process. Technol., 8, pp. 1089-1104.

  • Quigley MBC (1986); High Power Density Welding, in The physics of welding, Elsevier, pp. 306-329.

  • Ireland CLM (1990); Current State of Power Laser Technology and Future Trends, Manuf. Technol.

  • Chaudhary J, Jain NK, Pathak S, Koria SC (2019); Investigations on thin SS sheets joining by pulsed micro-plasma transferred arc process, Journal of Micro-manufacturing, 2, pp. 15-24.

  • Dwibedi S, Jain NK and Pathak S (2018); Investigations on joining of stainless steel tailored blanks by µ-PTA process, Mater. Manuf. Process., 33, pp. 1851-1863.

  • Dwibedi S, Bag S, Lodhi DK, Kalita A (2020); Joining of Different Thickness Dissimilar Materials S. SS 316L/SS 310 By m-PAW Process, in Advances in Additive Manufacturing and Joining, Springer, pp. 569-578.

  • Dwibedi S, Bag S (2021); Development of Micro-plasma Arc Welding System for Different Thickness Dissimilar Austenitic Stainless Steels, J. Inst. Eng. India Ser. C, 102, pp. 657-671.

  • Kumar P, Sinha AN, Hirwani CK, Murugan M, Saravanan A, Singh AK (2021); Effect of welding current in TIG welding 304L steel on temperature distribution, microstructure and mechanical properties, J. Braz. Soc. Mech. Sci. Eng. 43, p. 369.

  • Wang X, Hu Q, Li T, Liu W, Tang D, Hu Z, Liu K (2022); Microstructure and Fracture Performance of Wire Arc Additively Manufactured Inconel 625 Alloy by Hot-Wire GTAW, Metals 12(3), p. 510.

  • Nevcanoğlu A, Bozkurt Y, Salman S (2021); The Effect of TIG Welding Parameters and Automatization for Non-Heat Treated Inconel 718 Sheets, Arab. J. Sci. Eng., 46, pp. 12613-12623.

  • Khan FN, Junaid M, Hassan AA, Baig MN (2021); Effect of pulsation in TIG welding on the microstructure, residual stresses, tensile and impact properties of Ti-5Al-2.5Sn alloy, Proc. Inst. Mech. Eng. Part E J. Process Mech. Eng., 235, pp. 361-370.

  • Liu Y, Zhang S, Guo C, Long T, Li J (2022); Comparative study on CCTIG welding and PCTIG welding of GH4169 under the same heat input, Mater. Sci. Technol., 38, pp. 1451-1458.

  • Kornokar K, Nematzadeh F, Mostaan H, Sadeghian A, Moradi M, Waugh DG, Bodaghi M, (2022); Influence of heat input on microstructure and mechanical properties of gas tungsten arc welded HSLA S500MC steel joints, Metals, 12(4), p. 565.

  • Baruah M, Bag S (2016); Influence of heat input in microwelding of titanium alloy by micro plasma arc, Journal of Materials Processing Technology, 231, pp. 100-112.

  • Baruah M, Bag S (2016); Microstructural Influence on Mechanical Properties in Plasma Microwelding of Ti6Al4V Alloy, J. Mater. Eng. Perform., 25, pp. 4718-4728.

  • Saikia T, Baruah M, Bag S (2019); On the effect of heat input in plasma microwelding of maraging steel, Proc IMechE, Part B: J Engineering Manufacture, 233, pp. 807-822.

  • Saha D, Pal S (2019); Microstructure and Work Hardening Behavior of Micro-plasma Arc Welded AISI 316L Sheet Joint, Journal of Materials Engineering and Performance 28, pp. 2588-2599.

  • Haldar V, Biswal SK, Pal S (2022); Formability study of micro-plasma arc-welded AISI 316L stainless steel thin sheet joint, J. Braz. Soc. Mech. Sci. Eng., 44, p. 564.

  • Sahu AK, Bag S (2019); Finite Element Modelling and Experimental Verification of Dissimilar Joining Between Inconel 718 and SS 316L by Micro-plasma Arc Welding, in Advances in Computational Methods in Manufacturing, R.G. Narayanan, S.N. Joshi and U.S. Dixit, Eds., Springer Singapore, Singapore, pp. 231-243.

  • Sahu AK, Bag S (2020); Effect of Pre-weld Solution Treatment on Mechanical Properties and Microstructure of Micro-Plasma Arc Welded Inconel 718, in Advances in Additive Manufacturing and Joining, M.S. Shunmugam and M. Kanthababu, Eds., Springer Singapore, Singapore, pp. 373-383.

  • Orishich AM, Malikov AG, Shelyagin VD, Khaskin VY, Chayka AA (2016); Optimisation of the processes of laser, microplasma and hybrid laser-microplasma welding of aluminium alloys, Weld. Int., 30, pp. 957-961.

  • Ferro P, Bonollo F, Tiziani A (2005); Laser welding of copper-nickel alloys: a numerical and experimental analysis, Sci. Technol. Weld. Join., 10, pp. 299-310.

  • Devletian JH, Sullivan MJ, Engineer CW (2006); Flux Cored Arc Welding of CuNi 90/10 Piping with CuNi 70/30 Filler Metal, San Diego Portland State Univ. https://www.nsrp.org/wp-content/uploads/2015/09/Deliverable All_Position_Flux_Cored_Electrode_Final_Report-Portland_State_University.pdf

  • Munro C (2013); The Effects of Repeated Weld Repairs on the Mechanical Properties of Copper-Nickel Pipe Joints.

  • Chakravarthy M, Ramanaiah N, Sundara Siva Rao B (2014); Effect of laser welding on mechanical properties of 70/30 Cu-Ni alloy welds, Proc. Inst. Mech. Eng. Part B J. Eng. Manuf., 228, pp. 1153-1161.

  • Cao X, Nolting A (2019); Autogenous fiber laser welding of 70/30 Cu-Ni alloy plates, Mater. Des., 181, p. 108075.

  • Dwibedi S, Bag S (2020); Assessment by destructive and non-destructive approach to characterize 90/10 cupronickel weldments, Mater. Today Proc., 33, pp. 5014-5018.

  • Xing S, Bai S, Liu R, Liu Y, Qi J, Hou J, Jhang D (2023); Characterization of Corrosion Behavior and Corrosion Production Property of 90-10 Cupronickel Welding Joints in Flowing Seawater, Metals, 13, p. 294.

  • Dwibedi S (2016); Investigation on autogenous joining of stainless steel sheets of different thickness using micro Plasma Transferred Arc (m-PTA) process.

  • Maurya AK, Pandey C, Chhibber R (2023); Influence of heat input on weld integrity of weldments of two dissimilar steels, Mater. Manuf. Process., 38, pp. 379-400.

  • Torkamany MJ, Hamedi MJ, Malek F, Sabbaghzadeh J (2006); The effect of process parameters on keyhole welding with a 400 W Nd: YAG pulsed laser, J. Phys. Appl. Phys., 39, p. 4563.

  • Kumar B, Dwibedi S, Bag S (2022); On the interaction of cooling rate with thermal-microstructural-mechanical characteristics of laser-welded a+b titanium alloy, Adv. Mater. Process. Technol., 8, pp. 774-789.

  • Abosrra L, Ashour AF, Mitchell SC, Youseffi M (2009); Corrosion of Mild Steel and 316L Austenitic Stainless Steel with Different Surface Roughness in Sodium Chloride Saline Solutions, WIT Press Southampton.

  • Nabavi SF, Farshidianfar A, Dalir H (2023); A comprehensive review on recent laser beam welding process: geometrical, metallurgical, and mechanical characteristic modeling, Int. J. Adv. Manuf. Technol., 129, pp. 4781-4828.

  • Sahu N, Barik BK, Sahoo S, Badjena SK, Sahoo SK (2021); Studies on metallurgical and corrosion characteristics of dissimilar GTAW welding of alloy 800 and SS316L using multicomponent activated flux, Mater. Today Proc., 44, pp. 2533-2536.

  • Chuaiphan W, Kumkoon P, Kalnaowakul P (2023); Dissimilar welding of AISI 201 and 202 low nickel stainless steels by GTA and PA welding processes, J. Alloys Metall. Syst., 4, p. 100047.


Abstract Views: 324

PDF Views: 5




  • Joint Characteristics of Cu-Ni Alloy Fabricated by GTAW and MPAW Processes: A Comparative Study

Abstract Views: 324  |  PDF Views: 5

Authors

Swagat Dwibedi
Department of Mechanical Engineering Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
Swarup Bag
Department of Mechanical Engineering Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India

Abstract


The current work presents a comparative analysis of the joint behavior of Cu-Ni alloy weldments fabricated by Micro-Plasma Arc Welding (MPAW) and Gas Tungsten Arc Welding (GTAW) processes. The Cu-Ni alloy thin sheets are fabricated at different values of heat input (~40-135 J/mm) by MPAW and GTAW processes, respectively. Further, to evaluate their characteristics, joints are subjected to metallurgical, mechanical, and electrochemical testing. The joints fabricated with a higher magnitude of heat input resulted in deteriorated surface quality with a value of R ~ 6.13 µm. The increased surface roughness value of the joints resulted in a a higher corrosion rate (1.273 mm/year). A finer microstructural morphology is achieved for lower heat input condition. Accordingly, the weldment exhibited higher joint efficiency of ~91%.The prominent reason for achieving higher joint strength is related to the presence of lower secondary dendritic arm spacing (SDAS), which enhances the joint strength and ductility for the joints as compared to higher SDAS value. Further, the micro-fractography analysis reveals the presence of micro/macro-voids for high heat input, whereas the existence of numerous dimples of varying size and depth is observed for low heat input condition, implying the role of heat input of utmost importance.

Keywords


Heat Input, Surface Quality, Joint Strength, Fracture Analysis, Corrosion Behavior.

References





DOI: https://doi.org/10.22486/iwj.v57i1.223725