Formation of TiC/Ti2AlC and α2+γ in in-situ TiAl composites with different solidification paths
作者： Ruirun Chen , Hongze Fang , Xiaoyu Chen , Yanqing Su , Hongsheng Ding
DOI: 10.1016/J.INTERMET.2017.02.025
关键词: Composite material 、 Al content 、 Cracking 、 Metallurgy 、 Carbide 、 Microstructure 、 Materials science 、 Compressive strength 、 In situ 、 Lamellar structure
摘要: Abstract In order to improve the mechanical properties of TiAl alloys, composites with different solidification paths were synthesized by metallurgical method. Results show TiC disappears and Ti2AlC increases when Al content is more than 42% (at.%, similarly hereinafter). Small particles are located in grains irregular shapes 40%, they translate into clubbed increasing Al. This metallurgy method can solve defects lacking residual TiC. The γ phase between lamellar colonies When 48%, fully structure transforms a duplex microstructure there small phases phases, because forming must consume compressive strength up 1678.68 MPa as 46 at.%, then decrease 1460.22 MPa, strain keeps stabilization maximum improves 38.82% 121.37%. Ti2AlC/TiAl fracture behaviors load transferring behavior, crack deflection, trans-lamellar cracking extraction carbide reinforcements. properties.
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