Adiabatic blanking of advanced high-strength steels. Issue 1 (2020)

• Record Type: Journal Article
• Authors: Schmitz, Fabian; Winter, Sven; Clausmeyer, Till; Wagner, Martin F.-X.; Tekkaya, A.Erman
• Is Part Of: CIRP annals. Volume 69:Issue 1(2020)
• Page Start: 269
• Page End: 272
• Publication Date: 2020
• Subjects: Blanking -- Advanced high-strength steel -- Adiabatic; Production engineering -- Research -- Periodicals; 670.5
• DOI: 10.1016/j.cirp.2020.03.007
• Languages: English
• ISSNs: 0007-8506

Abstract

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.