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Experimental Investigation of Multi-pass ECMAP Process

  • P. M. Keshtiban
  • F. Bashirzadeh
Technical Paper
  • 14 Downloads

Abstract

Discontinuous part production as one of the main defects of single-pass equal channel angular pressing process was almost solved by studies suggesting equal channel multi-angular pressing (ECMAP) process. In the suggested method, multiple pressing operations are performed continuously without bringing the sample out of the mold. Thus, more uniform pieces are produced with less time consumption. In the present study, ECMAP process on strip-type products was done frequently up to three passes. The microstructurally transformed samples after each pass were extracted and compared. Also, to assess possible improvements in mechanical properties, tensile tests were done on all samples. Furthermore, the microstructural evolutions for each pass were investigated by X-ray diffraction analysis. According to the obtained results, the strength of samples was increased up to 49% in the first pass while it was raised by 45% and 13% for second and third passes, respectively. Moreover, 49, 33 and 34% reduction in the grain size were revealed by metallographic outcomes after the first, second and third ECMAP passes, respectively.

Keywords

ECMAP Multi-pass Strip AA 5754 SPD 

References

  1. 1.
    Jin Y, Son I-H, Kang S-H, and Im Y-T, Mater Sci Eng A 503 (2009) 152.CrossRefGoogle Scholar
  2. 2.
    Nakashima K, Horita Z, Nemoto M, and Langdon T G Acta Mater 46 (1998) 1589.CrossRefGoogle Scholar
  3. 3.
    Nakashima K, Horita Z, Nemoto M, and Langdon T G, Mater Sci Eng A 281 (2000) 82.CrossRefGoogle Scholar
  4. 4.
    Kim H S, Mater Sci Eng A 328 (2002) 317.CrossRefGoogle Scholar
  5. 5.
    Keshtiban P, Behnagh R, and Alimirzaloo V, Trans Indian Inst Met 1.Google Scholar
  6. 6.
    Keshtiban P, Zadshakouyan M, and Faraji G, J Adv Mater Process 3 (2015) 3.Google Scholar
  7. 7.
    Keshtiban P, Zadshakouyan M, and Faraji G, Trans Indian Inst Met 69 (2016) 1793.CrossRefGoogle Scholar
  8. 8.
    Faraji G, Yavari P, Aghdamifar S, Mashhadi M M, J Mater Sci Technol 30 (2014) 134.CrossRefGoogle Scholar
  9. 9.
    Abdolvand H, Faraji G, and Shahbazi Karami J, J Ultrafine Grained Nanostructured Mater 50 (2017) 16.Google Scholar
  10. 10.
    Keshtiban P M, Zadshakouyan M, Faraji G, J Adv Mater Process 3 (2015) 33.Google Scholar
  11. 11.
    Mashhadi Keshtiban P, Zadshakouyan M, and Faraji G, Modares Mech Eng 16 (2016) 275.Google Scholar
  12. 12.
    Keshtiban P, and Bashirzadeh F, Metallogr Microstruct Anal 6 (2017) 463.CrossRefGoogle Scholar
  13. 13.
    Cullity B, USA Edison-Wesley P Inc. (1978).Google Scholar

Copyright information

© The Indian Institute of Metals - IIM 2018

Authors and Affiliations

  1. 1.Faculty of Mechanical EngineeringUrmia University of TechnologyUrmiaIran
  2. 2.Faculty of Materials EngineeringSahand University of TechnologyTabrizIran

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