Adiabatic blanking of advanced high-strength steels

被引：15
|
作者：
Schmitz, Fabian [1 ]
Winter, Sven [2 ,3 ]
Clausmeyer, Till [1 ]
Wagner, Martin F-X [2 ]
Tekkaya, A. Erman [1 ]
机构：
[1] TU Dortmund Univ, Inst Forming Technol & Lightweight Components IUL, D-44227 Dortmund, Germany
[2] Tech Univ Chemnitz, Inst Mat Sci & Engn, D-09125 Chemnitz, Germany
[3] Fraunhofer Inst Werkzeugmaschinen & Umformtech IW, D-09126 Chemnitz, Germany
来源：
CIRP ANNALS-MANUFACTURING TECHNOLOGY | 2020年 / 69卷 / 01期
关键词：
Blanking; Advanced high-strength steel; Adiabatic; STRAIN-RATE; WEAR;
D O I：
10.1016/j.cirp.2020.03.007
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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. (C) 2020 CIRP. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：269 / 272
页数：4
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