Metallurgy 盒 Orientation Microstructure(columnar or equiaxed)and the zone of unremelted substrate (leading to loss of epitaxy)as a function of the laser process parameters. deposit T西W理 tthwtwhulwrh substrat 、1mm 54 (a) (b) (c) Single-crystal repair of a damaged SX turbine blade.(a)cracked platform,(b)platform repaired by E-LMF,(c) EBSD grain-structure map of transverse section of repaired zone.The colour scale shows the misorientation angle between the crystallite direction and the crystal coordinate system of a reference point MT333 Materials Applications Practice Prof.XiaoQi Chen B.15 Metallurgy cracking O TONG U Liquation cracking was found initiating from the weak site near the fusion line in the pre-deposited layer,propagating along the interdendritic region with the further deposition proceeding layer by layer. (e)10 layers (a) Laves 10 um 1mm The white arrows show the appearances of liquation cracks 100m 100 MT333 Materials Applications&Practice Prof.XiaoQi Chen B.16MT333 Materials Applications B.15 & Practice Prof. XiaoQi Chen Single-crystal repair of a damaged SX turbine blade. (a) cracked platform, (b) platform repaired by E-LMF, (c) EBSD grain-structure map of transverse section of repaired zone. The colour scale shows the misorientation angle between the crystallite direction and the crystal coordinate system of a reference point Microstructure (columnar or equiaxed) and the zone of unremelted substrate (leading to loss of epitaxy) as a function of the laser process parameters. Orientation Metallurgy (a) (b) (c) MT333 Materials Applications B.16 & Practice Prof. XiaoQi Chen cracking Liquation cracking was found initiating from the weak site near the fusion line in the pre-deposited layer, propagating along the interdendritic region with the further deposition proceeding layer by layer. The white arrows show the appearances of liquation cracks Metallurgy