Haohao Kong
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Haohao Kong has a total of 5 co-authors. Here are the top co-authors by number of shared publications:
- Hailong Qin
Beijing Key Laboratory of Advanced High Temperature Materials, Central Iron and Steel Research Institute, Beijing 100081, China
1 shared publication - Hang Su
Material Digital R&D Center, China Iron & Steel Research Institute Group Co., Ltd., Beijing 100081, China
1 shared publication - Jinli Xie
Gaona Aero Material Co., Ltd., Beijing 100081, China
1 shared publication - Yaqing Hou
Material Digital R&D Center, China Iron & Steel Research Institute Group, Beijing 100081, China
1 shared publication - Zhongnan Bi
Beijing Key Laboratory of Advanced High Temperature Materials, Central Iron & Steel Research Institute, Beijing, China
1 shared publication
Latest Publications
- Open Access
Integrated Thermal and Metallurgical Simulation Framework for Selective Laser Melting Multi-Component and Multi-Phase Alloys
To fully understand the impact of cyclic heating on the solid-state phase transformation behavior (SPTB) of multi-component multi-phase alloys (MCPA) during selective laser melting (SLM) and to provide possibilities for the precise customization of the material microstructure, a thermal-metallurgical coupling framework (TMCF) was developed. This framework integrates (1) an equivalent micro-zone heat source model and (2) a Johnson–Mehl–Avrami (JMA) phase transformation kinetic model. Using IN738 superalloy as an example, TMCF was effectively employed to predict the distribution and evolution of the γ′ phase during SLM. The results showed that the post-printing distribution of the γ′ phase is non-uniform, resulting from the interaction between the precipitation and dissolution behaviors occurring at varying temperatures across distinct spatial locations. Furthermore, the dependence of the γ′ phase on the SLM mode was quantitatively estimated. Specifically, the maximum volume fraction of the γ′ phase increased by a factor of 17.377, 60.780, and 5.214 when the laser power, scanning speed, and hatch spacing were modified by +50%, −25%, and −16.7%, respectively, within the process window. This finding can provide reference for the fabrication of additional MCPA. In this work, the thermal model within the TMCF was verified by the experimental data reported in the literature.
Open AccessIntegrated Thermal and Metallurgical Simulation Framework for Selective Laser Melting Multi-Component and Multi-Phase Alloys
To fully understand the impact of cyclic heating on the solid-state phase transformation behavior (SPTB) of multi-component multi-phase alloys (MCPA) during selective laser melting (SLM) and to provide possibilities for the precise customization of the material microstructure, a thermal-metallurgical coupling framework (TMCF) was developed. This framework integrates (1) an equivalent micro-zone heat source model and (2) a Johnson–Mehl–Avrami (JMA) phase transformation kinetic model. Using IN738 superalloy as an example, TMCF was effectively employed to predict the distribution and evolution of the γ′ phase during SLM. The results showed that the post-printing distribution of the γ′ phase is non-uniform, resulting from the interaction between the precipitation and dissolution behaviors occurring at varying temperatures across distinct spatial locations. Furthermore, the dependence of the γ′ phase on the SLM mode was quantitatively estimated. Specifically, the maximum volume fraction of the γ′ phase increased by a factor of 17.377, 60.780, and 5.214 when the laser power, scanning speed, and hatch spacing were modified by +50%, −25%, and −16.7%, respectively, within the process window. This finding can provide reference for the fabrication of additional MCPA. In this work, the thermal model within the TMCF was verified by the experimental data reported in the literature.