摘要
Aluminum-10% TiB master alloy was added in various proportions in 7178 Al alloy in order to examine the effect of TiB on grain refinement, wear and compressive deformation of the later one. Microstructural characterization reveals that TiB particles act as grain refiners for primary base alloy and result in globular dendrites. It was observed that the wear resistance and strength of the alloy decreased when the master alloy addition increased beyond 20%, even though the dendrites become much finer and almost spherical in nature.
在7178铝合金中添加不同比例的Al-10%TiB中间合金,考察TiB对铝合金的晶粒细化、磨损和压缩变形行为的影响。组织观察表明,TiB颗粒起着晶粒细化剂的作用,导致生成球状枝晶。当Al-TiB中间合金的添加量超过20%时,合金的耐磨性和强度随着中间合金添加量的增加而降低,即使其枝晶组织变得更细而接近于球状组织。
