Article
Optics
Jie Zhang, Qunli Zhang, Yifan Zhuang, Volodymyr Kovalenko, Jianhua Yao
Summary: The research investigate the hot corrosion behavior of laser deposited Inconel 718 alloy under different heat treatment conditions and found that the hot corrosion performance is closely related to the heat treatment method.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Luming Xu, Ze Chai, Bo Peng, Wei Zhou, Xiaoqi Chen
Summary: To achieve high-performance nickel-based superalloys for aviation applications, post-heat treatments are essential. The microstructure and segregation ratio strongly influence the microstructural evolution. Gradient laser power deposition samples exhibit fine discrete Laves phases and achieve a uniform element distribution and precipitation after standard solution treatment plus aging, while constant laser power deposition samples require high-temperature homogenization plus solution treatment plus aging to achieve uniform element distribution. Different heat treatments have a greater impact on the fracture mechanism, resulting in a transition from transgranular to mixed mode fractures.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Chongliang Zhong, Andres Gasser, Gerhard Backes, Jinbao Fu, Johannes Henrich Schleifenbaum
Summary: This study aims to demonstrate the great potential of laser-based direct energy deposition (DED) with increased deposition rate and achieve the static mechanical properties required by aerospace material specifications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Guoyun Luo, Manping Cheng, Longzhi Zhao, Yanchuan Tang, Jianhua Yao, Hailong Cui, Lijun Song
Summary: Preferential interdendritic oxidation observed in as-built additively manufactured Inconel 718 significantly promotes oxidation kinetics, highlighting the importance of homogenizing the composition and controlling primary precipitates to improve oxidation performance.
Article
Chemistry, Physical
Jun Yao, Bo Xin, Yadong Gong, Guang Cheng
Summary: The study demonstrates that a high initial temperature effectively improves the uneven distribution of internal residual stresses. Preheating can slow down the solidification time of the melt pool, facilitate the escape of gases, promote the homogeneous diffusion of elements in the melt pool, and enhance metallurgical bonding properties between layers, as well as improving tensile properties.
Article
Materials Science, Multidisciplinary
Liang Ma, Xiangwei Kong, Jingjing Liang, Jinguo Li, He Feng, Shiwei Ci, Xue Zhang, Cong Sun, Zhibo Jin
Summary: This study investigates the thermal behavior of molten pool in different laser deposition processes and explores the relationship between microstructure and mechanical properties. The results show that pulsed laser deposition leads to higher temperature gradient, faster cooling rate, and specific microstructures compared to continuous laser deposition. The mechanical tests demonstrate that samples from interval pulsed laser deposition exhibit higher strength and hardness, but lower ductility.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Abdullah Alhuzaim, Stano Imbrogno, Moataz M. Attallah
Summary: This study investigated the deposition of Inconel 718 alloy powder using the Direct Laser Deposition (DLD) process, revealing the significant influence of laser power and heat input on grain structure and segregation, allowing for the control of structures with different properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Yaowei Wang, Kangda Hao, Lei Zhao, Yongdian Han, Lianyong Xu, Wenjing Ren
Summary: In this study, a comparative analysis was conducted between GH3625 nickel alloy samples fabricated by conventional laser material deposition (LMD) and extreme high-speed laser material deposition (EHLA) technique. The EHLA-fabricated sample exhibited a refined microstructure, elevated dislocation density, and higher ultimate tensile strength compared to the LMD-deposited sample. The Clyne-Kurz model outperformed the classic Scheil model in evaluating AM processes sensitive to cooling rates. Furthermore, the EHLA sample demonstrated reduced segregation and formation of the Laves phase, as well as enhanced pitting corrosion resistance and protective effectiveness of passive films.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Mechanical
Xiaobin Yu, Xin Lin, Hua Tan, Yunlong Hu, Shuya Zhang, Fencheng Liu, Haiou Yang, Weidong Huang
Summary: This study demonstrates that different heat treatments on LDED IN718 can alter its microstructural characteristics and affect its FCG resistance. By carefully selecting heat treatment conditions, the FCG threshold of IN718 can be significantly increased, making it comparable to wrought IN718.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Mechanical
Kangbo Yuan, Weiguo Guo, Dongwu Li, Penghui Li, Yang Zhang, Peicheng Wang
Summary: This study focuses on the experimental investigation into the heat-treatment influence on the plastic flow behavior of the laser metal deposited (LMD) Nickel-base superalloy Inconel 718 and the development of microstructural based constitutive modeling. The study found that differences in plastic flow behavior among samples were attributed to the evolution of grain geometry and volume fraction and size of gamma precipitates during heat treatments. Additionally, a microstructural based constitutive model incorporating thermal activated interaction between dislocations and precipitates was developed to accurately predict the material's plastic flow response.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Engineering, Manufacturing
Chongliang Zhong, Venkatesh Pandian Narayana Samy, Norbert Pirch, Andres Gasser, Gandham Phanikumar, Johannes Henrich Schleifenbaum
Summary: This article presents a simulation-based methodology to design heat treatment for IN718 in the laser metal deposition process. The methodology involves simulating the laser melt pool, computing solidification rate, temperature gradient, and primary dendrite arm spacing, and using these input values to determine the heat treatment time and temperature. The results are verified with experimental data and a methodology for integrating process parameter with heat treatment design is developed. A heat treatment map for IN718 is generated, which can be integrated with an FEM solver for the first time in the LMD process.
3D PRINTING AND ADDITIVE MANUFACTURING
(2023)
Article
Chemistry, Physical
Stano Imbrogno, Abdullah Alhuzaim, Moataz M. Attallah
Summary: The study focused on the effect of pulsed laser frequency on the metallurgical characteristics of deposited thin walls in Direct Laser Deposition (DLD), showing significant impact on melt pool shape, grain size, and hardness.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Huaqiang Liu, Kai Guo, Jie Sun, Hao Shi
Summary: The Nb-reinforced Inconel 718 composites were fabricated via laser additive manufacturing and subjected to full heat treatment and direct aging treatment. Increasing Nb content enhanced the mechanical properties of the samples, leading to improved tensile strength and microhardness but reduced elongation. Direct aging had a superior effect on improving strength and microhardness compared to full heat treatment.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Jiayang Lu, Wenya Li
Summary: The effect of different heat treatments on the microstructural evolution and mechanical properties of laser directed energy deposited IN718/316L functionally graded material (FGM) was investigated. It was found that the specimen treated at 1080 degrees C exhibited higher ultimate tensile strength and elongation compared to the untreated specimen and the specimen treated at 980 degrees C. The wear resistance in the building direction increased with increased In718 powder content. The heat treatment led to the dissolution of the Laves phase and reprecipitation of the delta, gamma', and gamma'' phases in the top region of the specimen, while thinner grains boundaries and a transition from ferrite to austenite were observed in the middle and bottom regions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Sunny Sharma, Karthik Palaniappan, Vagish D. Mishra, Srikanth Vedantam, H. Murthy, Balkrishna C. Rao
Summary: This study investigated the microstructural evolution and mechanical properties of the Ni-based superalloy Inconel (R) 718 fabricated by powder-based laser fusion process. The characterization involved X-ray diffraction, optical, and scanning electron microscopy. The results showed that solution heat treatment effectively reduced detrimental Laves phases and relieved thermal residual stresses caused by non-homogeneous recrystallization. This research is significant for understanding the improvement of structural properties in Ni-based superalloys.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Chongliang Zhong, Andres Gasser, Jochen Kittel, Jinbao Fu, Yalin Ding, Reinhart Poprawe
JOURNAL OF LASER APPLICATIONS
(2016)
Article
Materials Science, Multidisciplinary
Chongliang Zhong, Jing Chen, Stefanie Linnenbrink, Andres Gasser, Shang Sui, Reinhart Poprawe
MATERIALS & DESIGN
(2016)
Article
Materials Science, Multidisciplinary
Chongliang Zhong, Norbert Pirch, Andres Gasser, Reinhart Poprawe, Johannes Henrich Schleifenbaum
Article
Automation & Control Systems
Chongliang Zhong, Jing Chen, Andres Gasser, Shang Sui, Johannes Henrich Schleifenbaum
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2018)
Article
Chemistry, Physical
Shang Sui, Chongliang Zhong, Jing Chen, Andres Gasser, Weidong Huang, Johannes Henrich Schleifenbaum
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Optics
Chongliang Zhong, Jochen Kittel, Andres Gasser, Johannes Henrich Schleifenbaum
OPTICS AND LASER TECHNOLOGY
(2019)
Article
Materials Science, Multidisciplinary
Shang Sui, Hua Tan, Jing Chen, Chongliang Zhong, Zuo Li, Wei Fan, Andres Gasser, Weidong Huang
Article
Thermodynamics
Min Zheng, Lei Wei, Jing Chen, Qiang Zhang, Chongliang Zhong, Xin Lin, Weidong Huang
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Review
Chemistry, Multidisciplinary
Chongliang Zhong, Jianing Liu, Tong Zhao, Thomas Schopphoven, Jinbao Fu, Andres Gasser, Johannes Henrich Schleifenbaum
APPLIED SCIENCES-BASEL
(2020)
Article
Engineering, Manufacturing
Zuo Li, Jing Chen, Shang Sui, Chongliang Zhong, Xufei Lu, Xin Lin
ADDITIVE MANUFACTURING
(2020)
Article
Materials Science, Coatings & Films
Hua Tan, Yanbo Fang, Chongliang Zhong, Zihao Yuan, Wei Fan, Zuo Li, Jing Chen, Xin Lin
SURFACE & COATINGS TECHNOLOGY
(2020)
Article
Engineering, Manufacturing
Dehua Liu, Dongjiang Wu, Guangyi Ma, Chongliang Zhong, Fangyong Niu, Andres Gasser, Johannes Henrich Schleifenbaum, Guijun Bi
VIRTUAL AND PHYSICAL PROTOTYPING
(2020)
Article
Engineering, Manufacturing
Chongliang Zhong, Venkatesh Pandian Narayana Samy, Norbert Pirch, Andres Gasser, Gandham Phanikumar, Johannes Henrich Schleifenbaum
Summary: This article presents a simulation-based methodology to design heat treatment for IN718 in the laser metal deposition process. The methodology involves simulating the laser melt pool, computing solidification rate, temperature gradient, and primary dendrite arm spacing, and using these input values to determine the heat treatment time and temperature. The results are verified with experimental data and a methodology for integrating process parameter with heat treatment design is developed. A heat treatment map for IN718 is generated, which can be integrated with an FEM solver for the first time in the LMD process.
3D PRINTING AND ADDITIVE MANUFACTURING
(2023)
Article
Optics
Tong Zhao, Marius Dahmen, Wangcan Cai, Moritz Alkhayat, Jonathan Schaible, Patrick Albus, Chongliang Zhong, Chen Hong, Tim Biermann, Han Zhang, Dongdong Gu, Andreas Weisheit, Andres Gasser, Johannes Henrich Schleifenbaum
OPTICS AND LASER TECHNOLOGY
(2020)
