| Title |
The Effect of Mechanical Alloying on the Microstructure of rapidly Solidified al Splats |
| Authors |
김완철(W . C . Kim); 김동훈(T . H . Kim) |
| Abstract |
Effects of mechanical alloying process on the microstructure of Rapidly Solidified Al were studied by Varing the processing time. The mechanical alloying process can be divided into five stages; 1. The initial period. 2. The period of welding predominance. 3. The period of equiaxed particle formation. 4. The period of convolution of the lamellae. 5. Steady state. The establishment of steady state processing conditions characterized by microstructure and saturation hardness (120 HV) of composite is found to depend on the processing time. During the first 200 minutes of processing the microvickers hardness can be approximated by H = 60+ 0.33 t and strutural refinement rate of composite are as follows ε=(K/0.33)In(l+0.0055t) |