期刊
ADVANCES IN MATERIALS AND PROCESSING TECHNOLOGIES
卷 5, 期 3, 页码 386-393出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/2374068X.2019.1616416
关键词
Equal channel angular extrusion (ECAE); pure copper; finite element method; high strain rate
资金
- FRGS Malaysia Government [FRGS5524737]
In the present study, the impact strength of refined grain pure copper developed by equal channel angular extrusion, up to eight passes at room temperature following route A with a constant ram speed of 20 mm/min through a die angle of 90 degrees between the die channels was investigated. The impact strength of extruded specimens is evaluated for the as-received and the extruded specimens after four and eight passes at a strain rate of 1200 s(-1) using Split-Hopkinson pressure bartechniques by experiment and the finite element method simulation. A total increase in the ultimate strength and yield strength are 128% and 68%, respectively, and observed for the extruded material after eight passes. Optical microscopic examinations show a grain refinement from 32 to 4 mu m. The results of the numerical study are consistent with that obtained from the experiment.
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