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Deciphering the deformation mechanism in single point incremental forming: experimental and numerical investigation

  • K. U. YazarEmail author
  • Sumeet Mishra
  • K. Narasimhan
  • P. P. Date
ORIGINAL ARTICLE
  • 69 Downloads

Abstract

In the present work, deformation mechanism in single-point incremental forming (SPIF) of drawing quality steel with a fully ferritic microstructure was studied. The effect of tool diameter and vertical step size on the micromechanisms of plastic deformation in SPIF was investigated by observing changes in microstructure and lattice rotation. It was observed that the fraction of grains with {111} ‖ normal direction (ND), which constitutes the gamma fiber in BCC materials, decreased with decrease in tool diameter and vertical step size. It is known that the state of deformation in SPIF is near to plane strain with the direction of major strain being always perpendicular to tool travel direction and negligible strain parallel to tool movement direction. Microstructural evidence for this observation and also for the presence of through thickness shear (TTS) components at smaller step size and tool diameter was observed. Viscoplastic self-consistent (VPSC) simulations revealed that the activity of \( \left\{112\right\}<11\overline{1}> \) slip system decreased in comparison to \( \left\{110\right\}<1\overline{1}1> \) slip system in the presence of TTS which manifested as the deviation from {111} ‖ ND position at smaller step size and tool diameter.

Keywords

Single point incremental forming Gamma fiber Plane strain Through thickness shear VPSC 

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Notes

Acknowledgements

The authors are extremely grateful to Prof. I. Samajdar for providing access to EBSD facility at the National facility for OIM at IIT Bombay. Authors are also thankful to Prof. Satyam Suwas, Dept. of Materials Engineering, Indian Institute of Science Bangalore, for his invaluable suggestions.

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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2018

Authors and Affiliations

  • K. U. Yazar
    • 1
    • 2
    Email author
  • Sumeet Mishra
    • 1
  • K. Narasimhan
    • 2
  • P. P. Date
    • 3
  1. 1.Department of Materials EngineeringIndian Institute of Science BangaloreBangaloreIndia
  2. 2.Department of Metallurgical Engineering and Materials ScienceIndian Institute of Technology BombayMumbaiIndia
  3. 3.Department of Mechanical EngineeringIndian Institute of Technology BombayMumbaiIndia

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