| A study has been made of the structure and properties of complex aluminum bronzes containing 8-8.5% Al and 2-6% of Ni and Fe respectively. The relation among Fe/Ni ratio, and mechanical property has been also studied. The results were as follows. 1. Mechanical properties of castings was increased as Fe/Ni ratio increases. 2. Activation energy for precipitation hardening was decreased as Ni and Fe increases. It`s range of specimen added Ni was from 26,000 to 35,000 ㎈/㏖, and by adding Fe from 24,000 to 28,000 ㎈/㏖. 3. The creep rate under the condition as T=873°K, σ=2.3 ㎏/㎟ was increased with the increasing Ni content and was decreased with the increasing Fe content. The creep rate by adding Ni was 1.0×10^(-4)∼1.20×10^(-4)/min, by adding Fe was 0.33×10^(-4)∼0.73×10^(-4)/min. Hot strength was increased by adding Fe and decreased by adding Ni |
|
