Transactions of the Indian Institute of Metals

, Volume 72, Issue 1, pp 239–244 | Cite as

Experimental Investigation of Multi-pass ECMAP Process

  • P. M. KeshtibanEmail author
  • F. Bashirzadeh
Technical Paper


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.


ECMAP Multi-pass Strip AA 5754 SPD 


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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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