Chinese Journal of Lasers, Volume. 51, Issue 10, 1002302(2024)
Research Progress on Crack Control and Composition Design of
Fig. 1. Material‒structure‒performance integrated LAM technology in multifunctional design and manufacturing[7]
Fig. 2. Morphology and cracking mechanism of solidification crack in LAM nickel-based superalloys. (a) Correlation between solid phase fraction and solidification cracking index (SCI)[24]; (b) schematic diagram of cracking mechanism[25]; (c) solidification crack in CM247LC alloy[24]; (d) solidification crack in IN939 alloy[24]
Fig. 4. Differential scanning calorimetry curves and morphology of ABD-850AM, CM247LC and IN939 alloys[24]
Fig. 5. DDC and its relationship with temperature in LAM nickel-based superalloys. (a) Morphology of DDC in IN738 alloy[34];
Fig. 6. Calculation and design of formable new γ' phase strengthened nickel-based superalloys. (a) Relationship between SAC risk and Al, Ti+Nb+Ta contents[24]; (b) γ' phase morphology and size in different generations of nickel-based single crystal superalloys[40]; (c) relationship between mole fraction of γ' phase and SAC merit index[24]; (d) relationship between creep life and SAC merit index[24]
Fig. 7. Relationship between the integrity of LAM component and process parameters and alloy composition[9,37]. (a) Defects caused by incompatibility between laser process parameters and alloy composition; (b) influence of composition optimization on solidification characteristics and formability of alloys
Fig. 10. Defect control and mechanical properties of LAM IN738LC alloy[18]. (a) Formability of IN738LC alloy under different laser powers and scanning speeds; (b) LPBF process map of IN738LC alloy; (c) influence of post-processing on tensile properties of as-printed samples at room temperature; (d) jet turbine blade fabricated by LPBF
Fig. 11. Thermodynamics-guided LAM superalloy design process[72]. (a) Interdendritic composition segregation measured by APT; (b) influence of partitioning behavior of alloy element on Tsolidus; (c) influence of alloy element on driving forces of phase formation, and a schematic diagram of the whole design process
Fig. 12. Prediction of crack susceptibility in LAM nickel-based superalloy[76]. (a) Construction process of ML model; (b) fitting performance of ML models on training sets; (c) comprehensive influence of elements on crack susceptibility evaluated by ML prediction model
Fig. 13. Relationship between composition and formability of nickel-based superalloys. (a) Formability of nickel-based superalloys represented by the contents of Al+Ti and Cr+Co[38]; (b) composition distribution of formable/unformable superalloys in
Fig. 14. Cracking resistance and mechanical properties of MNiHEA alloy[93]. (a) Relationship between average SCI value and solidification cracking in the last solidification stage; (b) uniaxial tensile engineering stress-strain curves; (c) strengthening and toughening mechanisms of as-built and aged alloys
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Shujing Shi, Zhuo Li, Chen Yang, Ziheng Zeng, Xu Cheng, Haibo Tang, Huaming Wang. Research Progress on Crack Control and Composition Design of
Category: Laser Additive Manufacturing
Received: Dec. 26, 2023
Accepted: Mar. 4, 2024
Published Online: Apr. 26, 2024
The Author Email: Li Zhuo (lizhuo@buaa.edu.cn)
CSTR:32183.14.CJL231577