기계적 합금화한 Al-50Ni 합금의 조직에 관한 연구 = A Study on the Microstructure of Mechanically Alloyed Al-50 Ni Alloys

다국어 초록 (Multilingual Abstract)

Particle properties such as size, distribution, shape, composition, and structure are greatly influencing on the mechanical properties of final P/M products.
Therefore, it is necessary that powders should be uniformed and strengthened by mechanical alloying.
Degree of mechanical alloying of Al-50Ni powders can be determined by observing the microstructural refinement, microhardness, and microstructure of composite metal powder during processing.
The mechanical alloying Process could be divided in five stages : initial stage, welding predominance stage, spherical particle formation stage, random welding predominance stage and steady state.
Mechanical alloying reached to a steady state after 600 min processing as the finer lamellar microstruture could to no longer resolved in the 10∼20㎛ and the powder particle size distribution remained constant with processing time and a saturation hardness of 450 Hv had been attained.
The rate of structural refinement of Al-50 Ni Composite was roughly logarithmic with processing time :
ε= 2.915 ln(1 + 0.014t).

목차 (Table of Contents)

• Ⅰ. 序 論
• Ⅱ. 實 驗
• Ⅲ. 實驗 結果 및 考察
• Ⅳ. 結 論