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Microstructural Changes during Creep and Fractography Study of Friction Stir-Processed Commercially Pure Cu

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Abstract

Friction Stir Processing (FSP) makes it possible to obtain a stir zone with very fine grain size, yet using FSP makes it impossible to obtain a uniform cross-section as far as the microstructure and mechanical properties are concerned. In the current study, the material was processed on both sides, thus yielding a wider, rectangular and more homogenous stir zone. Transmission Electron Microscope study was applied to both specimens made of the aforementioned friction stir-processed material and to parent material, both underwent creep at 355 °C under different loads. A fractography study conducted on broken specimens made of FSP’ed and parent materials that underwent creep at 252 °C. The investigation reported here revealed that in both cases dislocation structures were formed during creep. In addition, the fractography study yielded a micro-void coalescence fracture mechanism in the case of the parent material, whose cross-section was found to be uniform and fully dimpled. Unlike the parent material, the material that underwent FSP was found to have a layered structure where the inner layers were found to be dimple free, contrary to the outer dimpled layers. The existence of different layers may indicate on different properties and different fracture mechanisms along the depth axis.

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References

  1. R.S. Mishra, M.W. Mahoney, S.X. McFadden, N.A. Mara, and A.K. Mukherjee, High Strain Rate Superplasticity in a Friction Stir Processed 7070 Al Alloy, Scr. Mater., 2000, 42(2), p 163–168.

    Article  CAS  Google Scholar 

  2. R. Sandstrom and H.C.M. Andersson, The Effect of Phosphorus on Creep in Copper, J. Nucl. Mater., 2008, 372, p 66–75.

    Article  Google Scholar 

  3. M. Regev and S. Spigarelli, A Study of the Metallurgical and Mechanical Properties of Friction-Stir-Processed Cu, Metals, 2021, 11, p 6561–65611.

    Article  Google Scholar 

  4. C. Paoletti, E. Santecchia, M. Cabibbo, M. Regev, and S. Spigarelli, Revisiting Copper as a Case Study of Creep in Pure Metals: Prediction of Creep Response in Pure Cu in Half-Hard and Friction-Stir-Processed States, Mater. Sci. Eng. A, 2022, 832, p 142426.

    Article  CAS  Google Scholar 

  5. S. Cartigueyen and K. Mahadevan, Influence of Rotational Speed on the Formation of Friction Stir Processed Zone in Pure Copper at Low-Heat Input Conditions, J. Manuf. Process., 2015, 18, p 124–130.

    Article  Google Scholar 

  6. M. Barmouz, M. Kazem, B. Givi, and J. Jafari, Evaluation of Tensile Deformation Properties of Friction Stir Processed Pure Copper: Effect of Processing Parameters and Pass Number, J. Mater. Eng. Perform., 2014, 23, p 101–107.

    Article  CAS  Google Scholar 

  7. P. Xue, B.L. Xiao, and Z.Y. Ma, Achieving Large-Area Bulk Ultrafine Grained Cu via Submerged Multiple-Pass Friction Stir Processing, J. Mater. Sci. Technol., 2013, 29(12), p 1111–1115.

    Article  CAS  Google Scholar 

  8. K. Surekha and A. Els-Botes, Development of High Strength, High Conductivity Copper by Friction Stir Processing, Mater. Des., 2011, 32(2), p 911–916.

    Article  CAS  Google Scholar 

  9. P. Xue, B.L. Xiao, and Z.Y. Ma, High Tensile Ductility via Enhanced Strain Hardening in Ultrafine-Grained Cu, Mater. Sci. Eng. A, 2012, 532, p 106–110.

    Article  CAS  Google Scholar 

  10. I. Galvao, A. Loureiro, and D.M. Rodrigues, Influence of Process Parameters on the Mechanical Enhancement of Copper-DHP by FSP, Adv. Mat. Res., 2012, 445, p 631–636.

    CAS  Google Scholar 

  11. S. Salahi and V. Rezazadeh, Fracture Mechanism in Friction Stir Processed Annealed Pure Copper Samples, World Appl. Sci. J., 2013, 23(12), p 54–58.

    Google Scholar 

  12. S. Cartigueyen and K. Mahadevan, Study of Friction Stir Processed Zone Under Different Tool Pin Profiles in Pure Copper, IOSR-JMCE, 2014, 11(2), p 6–12.

    Article  Google Scholar 

  13. M. Barmouz, K. Abrinia, and J. Khosravi, Using Hardness Measurement for Dislocation Densities Determination in FSPed Metal in Order to Evaluation of Strain Rate Effect on the Tensile Behavior, Mater. Sci. Eng. A, 2013, 559, p 917–919.

    Article  CAS  Google Scholar 

  14. R.M. Leal, I. Galvao, A. Loureiro, and D.M. Rodrigues, Effect of Friction Stir Processing Parameters on the Microstructural and Electrical Properties of Copper, Int. J. Manuf. Technol., 2015, 80, p 1655–1663.

    Article  Google Scholar 

  15. M. Barmouz, M. Kazem, B. Givi, and J. Seyfi, On the Role of Processing Parameters in Producing Cu/SiC Metal Matrix Composites via Friction Stir Processing: Investigating Microstructure, Microhardness, Wear and Tensile Behavior. Mater. Charact., 2011, 62, p 108–117.

    Article  CAS  Google Scholar 

  16. Y. Wang, R. Fu, L. Jing, Y. Li, and D. Sang, Grain Refinement and Nanostructure Formation in Pure Copper During Cryogenic Friction Stir Processing, Mater. Sci. Eng. A, 2017, 703, p 470–476.

    Article  CAS  Google Scholar 

  17. Y. Wang, R. Fu, L. Jing, D. Sang, and Y. Li, Tensile Behaviors of Pure Copper with Different Fraction of Nonequilibrium Grain Boundaries, Mater. Sci. Eng. A, 2018, 724, p 164–170.

    Article  CAS  Google Scholar 

  18. Y. Wang, R. Fu, X. Zhou, G.B. Thompson, Z. Yu, and Y. Li, Enhanced Mechanical Properties of Pure Copper with a Mixture Microstructure of Nanocrystalline and Ultrafine Grains, Mater. Lett., 2016, 185, p 546–549.

    Article  CAS  Google Scholar 

  19. Y. Wang, M. Wang, K. Yin, A. Huang, Y. Li, and C. Huang, Yielding and Fracture Behaviors of Coarse-Grain/Ultrafine-Grain Heterogeneous-Structured Copper with Transitional Interface, T. Nonferr. Metal. Soc., 2019, 29(3), p 588–594.

    Article  CAS  Google Scholar 

  20. A. Moaref and A. Rabiezadeh, Microstructural Evaluation and Tribological Properties of Underwater Friction Stir Processed CP-Pure Copper and its Alloy, T. Nonferr. Metal. Soc., 2020, 30(4), p 972–981.

    Article  CAS  Google Scholar 

  21. A. Rajendran, N. Nadammal, K. Singh, and S.V. Kailas, Effect of Axial Load-Dependent Deformation Rate on the Grain Size Distribution and Mechanical Properties of Friction Stir Processed Copper, Mater. Perform. Charact., 2021, 10(2), p 268–278.

    CAS  Google Scholar 

  22. H. Mazaheri, H.J. Aval, and R. Jamaati, Achieving High Strength-Ductility in Pure Copper by Cold Rolling and Submerged Friction Stir Processing (SFSP), J. Manuf. Process., 2021, 67, p 496–502.

    Article  Google Scholar 

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Acknowledgments

The assistance of Mr. Netzer Navot with processing the material is highly appreciated. The authors thank Dr. Y. Kauffmann and Dr. E. Kesselman for their assistance with the TEM study and Dr. L. Popilevsky for TEM specimen preparation. Thanks are also due to Dr. A. Katz-Demyanetz for his assistance with the SEM study.

Funding

This research project is partially funded by Ort Braude College.

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Authors and Affiliations

  1. Department of Mechanical Engineering, ORT Braude College, P.O. Box 78, 21982, Karmiel, Israel

    Michael Regev

  2. DIISM, Università Politecnica delle Marche, 60131, Ancona, Italy

    Stefano Spigarelli

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  1. Michael Regev
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  2. Stefano Spigarelli
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Correspondence to Michael Regev.

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This article is an invited submission to the Journal of Materials Engineering and Performance selected from presentations at the symposium “Joining,” belonging to the area “Processing” at the European Congress and Exhibition on Advanced Materials and Processes (EUROMAT 2021), held virtually from September 12–16, 2021, and has been expanded from the original presentation.

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Regev, M., Spigarelli, S. Microstructural Changes during Creep and Fractography Study of Friction Stir-Processed Commercially Pure Cu. J. of Materi Eng and Perform 31, 7031–7038 (2022). https://doi.org/10.1007/s11665-022-06709-4

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