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Effect of growth rate on microstructure parameters and microhardness in directionally solidified Ti–49Al alloy
Highlights ► The α phase is the primary solidification phase in DS samples. ► The values of λ and λ L decrease with the increasing of V. ► The values of HV increase with the increasing of V. ► The values of HV decrease with the increasing of λ and λ L.
Abstract Intermetallics Ti–49Al (at.%) alloy was directionally solidified with different growth rates (V=5μm/s–30μm/s) at a constant temperature gradient (G=12.1K/mm) by using a Bridgman type directional solidification furnace. The primary dendritic spacing (λ), interlamellar spacing (λ L), and microhardness (HV) were measured. Effect of V on HV, λ and λ L was experimental investigated. The dependencies of λ, λ L and HV on the growth rate were determined by using linear regressing analysis. According to the result, the values of λ and λ L decrease with the increasing of V, and the values of HV increase with the increasing of V and with the decreasing of λ and λ L. The results were compared with previous similar experimental results for TiAl-based alloys.
Effect of growth rate on microstructure parameters and microhardness in directionally solidified Ti–49Al alloy
Highlights ► The α phase is the primary solidification phase in DS samples. ► The values of λ and λ L decrease with the increasing of V. ► The values of HV increase with the increasing of V. ► The values of HV decrease with the increasing of λ and λ L.
Abstract Intermetallics Ti–49Al (at.%) alloy was directionally solidified with different growth rates (V=5μm/s–30μm/s) at a constant temperature gradient (G=12.1K/mm) by using a Bridgman type directional solidification furnace. The primary dendritic spacing (λ), interlamellar spacing (λ L), and microhardness (HV) were measured. Effect of V on HV, λ and λ L was experimental investigated. The dependencies of λ, λ L and HV on the growth rate were determined by using linear regressing analysis. According to the result, the values of λ and λ L decrease with the increasing of V, and the values of HV increase with the increasing of V and with the decreasing of λ and λ L. The results were compared with previous similar experimental results for TiAl-based alloys.
Effect of growth rate on microstructure parameters and microhardness in directionally solidified Ti–49Al alloy
Fan, Jianglei (author) / Li, Xinzhong (author) / Su, Yanqing (author) / Guo, Jingjie (author) / Fu, Hengzhi (author)
2011-05-05
7 pages
Article (Journal)
Electronic Resource
English
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