Microstructure and mechanical properties of rapidly solidified Mg alloy powders compacted by magnetic pulsed compaction (MPC) method |
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| Authors: | Hong Jun Chae Young Do Kim Taek-Soo Kim |
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| Affiliation: | 1. BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team, Department of Bioengineering, College of Engineering, Seoul, 133-791, Republic of Korea;2. Institute for Bioengineering and Biopharmaceutical Research, Hanyang University, Seoul, 133-791, Republic of Korea;1. Division of Nanoscale Semiconductor Engineering, Hanyang University, 17 Haengdang-dong, Seoungdong-gu, Seoul 133-791, South Korea;2. Division of Materials Science & Engineering, Hanyang University, 17 Haengdang-dong, Seoungdong-gu, Seoul 133-791, South Korea |
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| Abstract: | Gas atomized Mg–Zn4.3Y0.7 (at%) alloy powders were consolidated by using a magnetic pulsed compaction (MPC) process, and obtained by rapid solidification not to lose the fine microstructure during the generally conducted thermal consolidation process. MPC is known as one of the most rapid pressing process with the GPa range. The effects of the discharging voltage and thermal pressure on the microstructure, hardness, density and compressive strength were investigated. The experimental results showed that the density increased with increasing the voltage although the sample MPCed still consists of pores especially between the powder boundaries even at the maximum pressure of this investigation. The density was improved further up to 96% to the cast value by the MPC at the maximum voltage. Uniform and fine microstructure formed in the alloy powders as atomized was almost maintained even after the thermal MPC. |
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