Hongyou Bian, Xiaowen Xu, Weijun Liu, Wei Wang, Fei Xing, Huiru Wang. Control of dendrite epitaxial growth and microstructure characteristics of laser deposition repaired DD5 alloy[J]. Infrared and Laser Engineering, 2023, 52(5): 20220731
- Infrared and Laser Engineering
- Vol. 52, Issue 5, 20220731 (2023)
Fig. 1. SEM morphology of DZ125 superalloy powder
Fig. 2. (a) Laser deposition equipment; (b) Schematic diagram of laser deposition repaired DD5 alloy
Fig. 3. Cross-section macroscopic morphology of single-layer deposition zone
Fig. 4. Cross-section macroscopic morphology of deposition region with different laser processing parameters
Fig. 5. (a) Influence of the laser processing parameters on width W of deposition zone; (b) Influence of the laser processing parameters on height H , remelted height H Rand total height H +H R of deposition zone
Fig. 6. (a) Influence of the laser processing parameters on dendrite epitaxial growth height H E of deposition zone; (b) Influence of the laser processing parameters on the ratio of dendrite epitaxial growth η of deposition zone
Fig. 7. (a) Cross-section macroscopic morphology of the deposition zone; (b) Macrostructure of the deposition zone
Fig. 8. (a) Macrostructure of the substrate; (b) Macrostructure of the deposition zone; (c) Equiaxed crystal; (d) CET region; (e) Columnar crystals; (f) Planar crystal
Fig. 9. (a) γ ' morphology of the substrate; (b) γ ' morphology of the heat affected zone; (c) γ ' morphology of the dendritic epitaxial growth region of deposition zone
Fig. 10. (a) Partition coefficient between the core-dendritic and inter-dendritic region of deposition zone; (b) Amplitude of solution concentration between the core-dendritic and inter-dendritic region of deposition zone
Fig. 11. (a) Carbide distributions in the substrate; (b) Carbide morphology of the substrate; (c) Carbide morphology of the heat affected zone
Fig. 12. (a) Carbide distributions in middle and lower of the deposition zone; (b) Carbide distributions in top of the deposition zone; (c) Carbide morphologies at the bottom; (d) Carbide morphologies at the middle; (e) Carbide morphologies at the top
Fig. 13. (a) Microhardness of substrate and deposition zone； (b) Average microhardness
|
Table 1. Chemical composition of DZ125 superalloy powder and DD5 alloy (wt.%)
|
Table 2. Process parameters of laser deposition repaired DD5 alloy
|
Table 3. Energy spectrum analysis of the substrate and different regions of deposition zone (wt.%)
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