MODEL FOR COARSENING OF SDAS AND ITS VERIFICATION IN MULTICOMPONENT SC SUPERALLOYS
来源期刊：中国有色金属学报(英文版)1994年第2期
论文作者：He Guo Li Jianguo Mao Xiemin Fu Hengzhi
文章页码：67 - 70
Key words：secondary dendrite arm spacing; directional solidification; SC superalloy
Abstract: Based on a general relationship of secondary dendrite arm spacing(SDAS)λ2 to solidification time t:λ23=k0t,a dependence of λ2 on thermal gradient and solidification rate has been presented by assumption of paraboloidal dendrite tip. With the model, secondary dendrite arm spacings predicted for multi component super alloy DD8 and PWA-1480 were in conformity with experimental data.
