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Meeting Materials Science & Technology 2019
Symposium Formability and Fracture of Metal Sheets
Presentation Title P3-90: Prediction Method of Voids Distribution in the Punched Surface of the Spheroidizing Annealed Medium Carbon Steel Sheet by the Scrap
Author(s) Ken Saito, Chikara Inoue, Kazuhiko Yamazaki, Sota Goto, Shinsuke Suzuki
On-Site Speaker (Planned) Ken Saito
Abstract Scope Several studies have reported that voids near punched surface decrease stretch flange formability. However, non-destructive observation of voids near punched surface before hole expanding is difficult. Therefore, the authors assumed that the voids distribution in a thickness direction of blank (holder side) is point symmetrical with that of scrap (hole side). The objective of this study was to investigate validity of the assumption and establishing the prediction method of voids distribution near punched surface. After punching a spheroidizing annealed medium carbon steel sheet, voids near punched surface were measured. The distribution of the number density of voids in a thickness direction between scrap and blank had slight deviation in a thickness direction. The area fraction of voids of the scrap was higher than that of the blank. However, as these differences showed systematic tendencies, the voids distribution in a blank can be predicted through evaluation of its corresponding scrap.
Proceedings Inclusion? Definite: At-meeting proceedings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Method to Predict the Ductile Fracture of Metal Sheets under Complex Plane Stress
Anisotropic and Time-dependent Continuum Damage Coupled Plasticity Model for Predicting Ductile Fracture of AA 6xxx
Behavior of Quenched-and-Partitioned Steels Deformed at Elevated Temperatures
Biaxial Tensile Testing Using Laser-deposited Cruciform and Its Extension to Non-proportional Loading
Deformation Mode Effects on Austenite Stability of Quenched-and-Partitioned Steel Measured via X-ray Diffraction and Electron Backscattered Diffraction
Distortional Anisotropic Hardening Model for Describing Complex Bauschinger and Transient Effects in Metal Forming Simulations
Edge Stretchability of Hot Rolled High-strength Low-alloy Steel
Effect of Ultrasonic-assisted Two-point Incremental Sheet Forming (UA-TPIF) on Surface Finish
Mechanical Behavior of Ni and Cr added Bainite/ Martensite Multiphase Steels
Mitigation of Edge Cracking during Accumulative Roll Bonding of Aluminum Alloys
P3-90: Prediction Method of Voids Distribution in the Punched Surface of the Spheroidizing Annealed Medium Carbon Steel Sheet by the Scrap
Stress-strain Response in the Early Stage of Hydraulic Bulge Testing
Study of GP-zone/MgZn2 Precipitation Coupled with Deformation in Al-Zn-Mg-Cu to Overcome the Strength-ductility Paradox
The Influence of Phase Constituents on Hole Expansion Capacity of Multi-phase Steels

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