| Title |
Effect of Pressure during Solidification on the Structure and mechanical Properties of Al - 4.5% Cu Cast Alloy |
| Authors |
최창옥(Chang Ock Choi); 이종남(Jong Nam Lee) |
| Abstract |
A1-4.5% Cu alloy without grain refiner and degassing agent was allowed to solidify in a cylindrical die with 200℃ under high hydrostatic pressure ranging from 0 ㎏/㎠ to 2,000㎏/㎠ at 750℃ pouring temperature. Castings solidified, under pressure showed the following characteristics; (1) Suppression of shrinkage cavity and porosity (2) Columnar crystal change to equiaxed crystal by increasing the applied pressure (3) Refinement of grain size (4) Improvement in mechanical properties to 1,000㎏/㎠ |