Lanyun Qin, Heda Wang, Changfu Li, Yuhang Ren, Chao Wang, Guang Yang. Influence of Base Material Microstructure on Liquation Cracks Sensitivity in Laser Deposition Repaired K4169 Alloy[J]. Chinese Journal of Lasers, 2024, 51(10): 1002322
- Chinese Journal of Lasers
- Vol. 51, Issue 10, 1002322 (2024)
Fig. 1. Microstructure of base material (K4169 alloy in cast state) and micro-morphology of powder. (a) Microstructure of K4169 alloy in cast state; (b) micro-morphology of GH4169 spherical powder
Fig. 2. Schematics of laser deposition repair experiment. (a) Schematic of laser deposition repair; (b) schematic of laser deposition scanning path
Fig. 3. Schematic of tensile specimens
Fig. 4. OM images of K4169 alloy base material in different heat treatment states. (a) Homogenization+solution+aging treated base material; (b) homogenization+hot isostatic pressing+solution+aging treated base material
Fig. 5. SEM images of K4169 alloy base material in different heat treatment states. (a) Homogenization+solution+aging treated base material; (b) homogenization+hot isostatic pressing+solution+aging treated base material
Fig. 6. XRD patterns of K4169 alloy base material in different heat treatment states
Fig. 7. Liquefaction cracks in the heat-affected zone of repaired specimens of K4169 alloy in different heat treatment states. (a) Homogenization+solution+aging treated alloy; (b) homogenization+hot isostatic pressing+solution+aging treated alloy
Fig. 8. Microstructures of heat-affected zone of repaired specimen of homogenization+solution+aging treated K4169 alloy
Fig. 9. Liquation cracks in heat-affected zone of repaired specimen of homogenization+hot isostatic pressing+solution+aging treated K4169 alloy. (a) Overall crack morphology; (b)(c)(d) magnified view of cracks in different zones
Fig. 10. Distribution of elements near liquation cracks in repaired specimen of homogenization+hot isostatic pressing+solution+aging treated K4169 alloy
Fig. 11. Liquation crack generation mechanism for repaired specimen of homogenization+hot isostatic pressing+solution+aging treated K4169 alloy, where image Ⅰ shows phase dissolution stage, image Ⅱ shows eutectic liquefaction stage, and image Ⅲ shows eutectic solidification stage
Fig. 12. Liquid film generation mechanism for repaired specimen of homogenization+solution+aging treated K4169 alloy, where image Ⅰ shows phase dissolution stage, image Ⅱ shows eutectic liquefaction stage, and image Ⅲ shows eutectic solidification stage
Fig. 13. Microhardness of K4169 alloy repaired specimens with different heat treatment states
Fig. 14. Tensile results of repaired specimens of K4169 alloy in different heat treatment states
|
Table 1. Heat treatment of K4169 alloy
| |||||||||||||||||||||||||||||||
Table 2. Chemical composition of K4169 alloy and GH4169 spherical powder
|
Table 3. Laser deposition repair (LDR) parameters
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Table 4. EDS results of precipitates in K4169 alloy in different heat treatment states
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20