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  4. Adiabatic blanking of advanced high-strength steels
 
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2020
Journal Article
Title

Adiabatic blanking of advanced high-strength steels

Abstract
Adiabatic blanking of advanced high-strength steels with initial flow stresses above 1300 MPa is investigated. The blanked edge exhibits a unique S-shape. Localisation and properties of shear bands are analysed in shear-compression tests. A shear-compression stress state before separation leads to blanked edges without fracture zone, burr, or roll-over. Numerical modelling predicts the characteristic shape of the blanked edge satisfactorily. Physics-based models reveal that the strain rate sensitivity of the workpiece material is the key parameter affecting the width and the surface hardness of the shear band. Stress triaxiality and strain rate sensitivity determine the minimum size of radii in complex parts blanked without failure.
Author(s)
Schmitz, Fabian
TU Dortmund
Winter, Sven  
Fraunhofer-Institut für Werkzeugmaschinen und Umformtechnik IWU  
Clausmeyer, Till
TU Dortmund
Wagner, Martin Franz-Xaver
TU Chemnitz
Tekkaya, Erman
TU Dortmund
Journal
CIRP Annals. Manufacturing Technology  
DOI
10.1016/j.cirp.2020.03.007
Language
English
Fraunhofer-Institut für Werkzeugmaschinen und Umformtechnik IWU  
Keyword(s)
  • Blanking

  • advanced hig-strenght steel

  • adiabatic

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