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Influence of grain size on deformational behavior in microextrusion process

  • S. NanthakumarEmail author
  • D. RajenthirakumarEmail author
Technical Paper
  • 20 Downloads

Abstract

Miniaturization drives the need for developing appropriate technology for microproducts of extremely small geometric features with high tolerances. In this work, the authors have investigated the material behavior and size effect in microextrusion of pure copper and aluminum with different grain sizes. A forward microextrusion assembly has been developed in the first phase of work to investigate the grain size effects. The experimental results are then compared to finite element simulation to quantify force displacement response. It has been found that the simulated deformation load is comparable with experimental results. The influence of size effect in both copper and aluminum showed that the extrusion load and average microhardness of 38 μm and 34 μm are higher when compared to 204 μm and 124 μm. In the second phase of work, an attempt has been made to fabricate the copper microgear (m = 0.416 mm) by the developed extrusion setup. The findings of this work are essential for further development of micro-formed parts and will facilitate in introducing microextrusion for mass production of industrial components.

Keywords

Size effect Material behavior Microgear Microhardness 

Notes

Acknowledgements

The authors wish to thank the Science and Engineering Research Board, Government of India and Management of PSG College of Technology, Coimbatore, and PSG Institute of Technology and Applied Research, Coimbatore, for their funding and support provided to carry out this research work.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

References

  1. 1.
    Rajenthirakumar D, Sridhar R (2016) Experimental investigations of grain size effects in forward microextrusion. Int J Adv Manuf Technol 85:2257–2264CrossRefGoogle Scholar
  2. 2.
    Chan WL, Fu MW, Yang B (2011) Study of size effect in microextrusion process of pure copper. Mater Des 32(2011):3772–3782CrossRefGoogle Scholar
  3. 3.
    Parasiz SA, Kinsey BL, Mahayatsanum N, Cao J (2011) Effect of specimen size and grain size on deformation in micro extrusion. J Manuf Processes 13:153–159CrossRefGoogle Scholar
  4. 4.
    Krishnans N, Cao J, Dohda K (2007) Study of the size effects on friction conditions in micro extrusion—part I: micro extrusion experiments and analysis. J Manuf Sci Eng 129:669–676CrossRefGoogle Scholar
  5. 5.
    Mori LF, Krishnan N, Cao J, Espinosa HD (2007) Study of the size effects on friction conditions in micro extrusion—part II: size effect in dynamic friction for brass-steel pairs. J Manuf Sci Eng 129:677–689CrossRefGoogle Scholar
  6. 6.
    Ghassemali E, Tan M-J, Wah CB, Lim SCV, Jarfors AEW (2014) Friction effects during open-die micro-forging/extrusion processes: an upper bound approach. Proc Eng 81:1915–1920CrossRefGoogle Scholar
  7. 7.
    Dong X, Chen F, Chen S, Yang L, Huang Z, Chen H, Feng S, Zhao L, Wu Z, Zhang X (2015) Microstructure and micro hardness of hot extruded 7075 aluminum alloy micro gear. J Mater Process Technol 219:199–208CrossRefGoogle Scholar
  8. 8.
    Saotome Y, Iwazaki H (2001) Super plastic backward micro extrusion of micro parts for micro-electro-mechanical systems. J Mater Process Technol 119(1–3):307–311CrossRefGoogle Scholar
  9. 9.
    Saotome Y, Iwazaki H (2001) Super plastic extrusion of micro gear shaft of 10 μm in module. Microsyst Technol 7(6):126–129Google Scholar
  10. 10.
    Fu MW, Chan WL (2013) A review on the state-of-the-art microforming technologies. Int J Adv Manuf Technol 67:2411–2437CrossRefGoogle Scholar
  11. 11.
    AkhtarRazul R, Yi Q (2013) A review on micro-manufacturing, micro-forming and their key issues. Proc Eng 53:665–672CrossRefGoogle Scholar
  12. 12.
    J-p W, Huang GM (2015) Fine extrusion device approach. Int J Adv Manuf Technol.  https://doi.org/10.1007/s00170-015-8277-6 CrossRefGoogle Scholar
  13. 13.
    EngelU ER (2002) Microforming from basic research to its realization. J Mater Process Technol 125–126:35–44CrossRefGoogle Scholar
  14. 14.
    Vollerston F, Hu Z, Schulze Niehoff H, Theiler C (2004) State of the art in microforming and investigations into micro deep drawing. J Mater Process Technol 151:70–79CrossRefGoogle Scholar
  15. 15.
    Azimi M, Mirjavadi SS (2017) Effect of temperature on micro structural evolution and subsequent enhancement of mechanical properties in a backward extruded magnesium alloy. Int J Adv Manuf Technol 95:3155–3166CrossRefGoogle Scholar
  16. 16.
    C-j L, H-f S, W-b F (2014) Effect of extrusion temperatures on microstructures and mechanical properties of Mg–3Zn–0.2Ca–0.5Y alloy. Proc Eng 81:610–615CrossRefGoogle Scholar
  17. 17.
    Eichenhueller B, Egerer E, Engel U (2007) Microforming at elevated temperature—forming and material behavior. Int J Adv Manuf Technol 33:119–124CrossRefGoogle Scholar
  18. 18.
    Wang X, Liu J, Zhao X, Liu X, Xie H, Jiang Z (2017) Micro extrusion of ultrafine grained titanium prepared by ECAP. J Wuhan Univ Technol Mater Sci Ed 32(2):437–443CrossRefGoogle Scholar
  19. 19.
    Li Z, Zhao J, Jia F (2018) Numerical and experimental investigation on the forming behavior of stainless/carbon steel bimetal composite. Int J Adv Manuf Technol.  https://doi.org/10.1007/s00170-018-2985 CrossRefGoogle Scholar
  20. 20.
    Jindal PC, Armstrong RW (1967) The dependence of the hardness of cartridge brass on grain size. Trans Metall Soc ASME 239(November):1856–1857Google Scholar
  21. 21.
    Cullity BD, Stock SR (2001) Elements of X-ray diffraction. Prentice-Hall, Englewood Cliffs, pp 402–403Google Scholar
  22. 22.
    Kim WJ, Sa YK (2006) Micro-extrusion of ECAP processed magnesium alloy for production of high strength magnesium micro-gears. Scr Mater 54(2006):1391–1395CrossRefGoogle Scholar
  23. 23.
    Geiger M, Kleiner M, Eckstein R, Tiesler N, Engel U (2001) Microforming. Ann CIRP 50(2):445–462CrossRefGoogle Scholar

Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringPSG Institute of Technology and Applied ResearchCoimbatoreIndia
  2. 2.Department of Mechanical EngineeringPSG College of TechnologyCoimbatoreIndia

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