Limit dome height test of very thin brass sheet considering the scaling effect

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Sahu, Jambeswar^1 ; Mishra, Sushil^1

Department of Mechanical Engineering, Indian Institute of Technology, Bombay

400076, India^1

关键词: Electron back-scattered diffraction;    Limiting strain;    Material geometry;    Mechanical behaviour;    Metal-forming process;    Microscopy technique;    Mis-orientation;    Scaling effects;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032114/pdf
DOI  :  10.1088/1742-6596/734/3/032114

来源: IOP

【 摘 要 】

The effect of reduction of material geometry in metal forming process is important and is more effective when material size less than 100 micron. Thin brass sheet of 30. 50. 90 micron thickness were tested by in-plane uniaxial and out-of-plane limit dome height (LDH) test to investigate the size effect. The test was carried for both as-received and annealed specimen. The microstructure of all tests was determined in details by electron back scattered diffraction (EBSD) microscopy technique. There was a clear dependency of mechanical behaviour observed on part miniaturized of both tensile and LDH test. The limiting strain is obtained maximum at plane strain path in LDH test having more misorientation. The 50 micron sheet in biaxial strain path required more load and have larger major strain, more texture and Taylor factor value.