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진동복합하중에 따른 Al계 초소성합금과 Zr계 비정질합금의 마이크로 성형에 관한 연구
손선천(Son Seon Cheon),박규열(Park Kyu Yeol) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Micro forming is a suited technology to manufacture very small metallic parts(several ㎜~㎛). In this study, the micro forming property was studied, using Al5083 superplastic alloy with micro grain, suitable for the micro forming process and Zr-BMG amorphous with pseudo-superplastic phenomena in the supercooled liquid state. In a energy point of view, the vibrational load was useful for micro forming field. The vibrational load reduced friction and sticking slip between micro die and material and release the air static pressure bearing effect between micro die and material.
Al계 초소성합금과 Zr계 비정질합금의 마이크로 진동성형에 관한 연구
손선천(Seon Cheon Son),박규열(Kyu Yeol Park),나영상(Young Sang Na) 한국생산제조학회 2007 한국공작기계학회 춘계학술대회논문집 Vol.2007 No.-
Micro forming is a suited technology to manufacture very small metallic parts(several ㎜-㎛), Al5083 superplastic alloy with very small grains has a great advantage in achieving micro deformation under low stress due to its relatively low strength at a specific high temperature range. Micro forming of Zr?₂Cu₁?Ni₁₃Al? bulk Metallic glass(BMG) as a candidate material for this developing process are feasible at a relatively low stress in the supercooled liquid state without any crystallization during hot deformation. In this study, the micro formability of Al5083 superplastic alloy and bulk metallic glass, Zr?₂Cu₁?Ni₁₃Al?, was investigated with the specially designed micro vibration forming system using pyramid-shape, V-shape and U-shape micro die pattern. With these dies, micro vibration forming was conducted by varying the applied load, time. Micro formability was estimated by comparing the hight of formed shape using non-contact surface profiler system. The vibration load was effected to metal flow in the micro die and improve the micro formability of Al5083 superplastic alloy and Zr?₂Cu₁?Ni₁₃Al? bulk Metallic glass(BMG).