Article
Automation & Control Systems
Prveen Bidare, Aldi Mehmeti, Amaia Jimenez, Sheng Li, Chris Garman, Stefan Dimov, Khamis Essa
Summary: This paper analyzes the influence of process parameters on the porosity, crack formation and microstructure of additively manufactured CM247LC nickel-based alloy. It demonstrates the feasibility of using the direct laser deposition (DLD) process to manufacture crack-free and low-porosity CM247LC samples. The study also shows that good bonding between Inconel 718 substrate and deposited layers can be achieved by using specific laser power, scanning speed, and powder flow rates.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Yeda Lian, Liqiang Gao, Pinpin Hu, Qian Yin, Xiaoshuai Wang, Zhixun Wen, Jundong Wang
Summary: The withdrawal rate significantly affects the microstructure and mechanical properties of CoNi-based single-crystal alloys, with higher rates leading to refined dendritic structures and gamma' phase. Creep rupture life of as-cast alloy decreases with increasing withdrawal rate, while the microstructure and mechanical properties of heat-treated alloys are less affected, likely due to the elimination of withdrawal rate effects through full heat treatment.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
E. Rambaldi, V. M. La Torre, A. Tartaglia
Summary: This study characterizes the cutting responses of porcelain stoneware slabs by conducting mineralogical and microstructural analyses. It identifies the sintering index and total porosity as critical parameters for evaluating cutting responses. The research concludes that the best cutting response in porcelain stoneware slabs is achieved when the total porosity is maximized, the pores are minimized, and the sintering index is minimized, without compromising the quality and technical performance of the porcelain stoneware.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Wei Chen, Yuehan Liu, Mingquan Sheng, Hejun Zhang, Yue Liang, Frederic Skoczylas
Summary: This experimental study investigated the effect of heating rate on gas permeability and microstructure of mortar. The results show that an increase in temperature and heating rate leads to an increase in porosity and gas permeability. As confinement is increased, gas permeability and porosity continue to decrease due to a reduction in pore volume. High heating rate induces microcracks at certain temperatures, and the fractal dimension can quantitatively characterize the complexity of the pore structure.
Article
Nanoscience & Nanotechnology
Marat Latypov, Jean-Charles Stinville, Jason R. Mayeur, Jonathan M. Hestroffer, Tresa M. Pollock, Irene J. Beyerlein
Summary: The study reveals that highly localized elastic strain concentrations in polycrystalline microstructures under monotonic loading depend on particular crystallographic and morphological orientations of grains, rather than on crystalline details of their local neighborhood. Annealing twin boundaries with specific topological and crystallographic features may increase the likelihood of slip band initiation throughout the microstructure of polycrystalline Ni-base superalloys.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
O. E. Bamidele, O. A. Ojo
Summary: A new numerical model was developed to study the kinetics of liquid phase bonding, with the results showing that the solute concentration gradient in the liquid plays a crucial role. The study also found that solid-state diffusion affects not only the transition in solidification behavior, but also the kinetics of the bonding process. Additionally, the anomalous increase in solidification completion time during C-TLP bonding can be avoided by TG-TLP bonding with a sufficiently high solute concentration gradient.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Lucille Despres, Sophie Costil, Jonathan Cormier, Patrick Villechaise, Romain Cariou
Summary: Surface laser texturing is used to enhance mechanical anchoring and adhesion between interfaces of thermal barrier coating systems. This study analyzed microstructural evolutions in different Ni-based single crystal superalloys during infrared nanosecond laser ablation, and compared thermal-affected volumes for different alloys. The research found that all studied single crystal superalloys behaved similarly during nanosecond laser ablation, suggesting possible non-uniform ablation kinetics between different phases of Ni-based alloys.
Article
Chemistry, Physical
Qingling Li, Huarui Zhang, Ying Cheng, Ming Du, Ming Gao, Tao Hong, Yu Jin, Hu Zhang
Summary: The solidification characteristics and high temperature tensile properties of the IN713C superalloy were investigated using directional solidification methods. The results showed that the carbide morphologies changed with increasing withdrawal rate, and the increase in withdrawal rate promoted microsegregation and precipitation of certain elements. The IN713C alloy exhibited higher strength and elongation at higher withdrawal rates, while the morphology of carbides affected the fracture mechanism of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Shulei Yang, Shufeng Yang, Wei Liu, Jingshe Li, Jinguo Gao, Yi Wang
Summary: The microstructure, elemental segregation, and precipitation of GH4742 superalloy were studied using zonal melting liquid metal cooling (ZMLMC) experiments. The primary dendrite spacing showed a linear correlation with G(-1/2)V(-1/4) at high cooling rates, while the secondary dendrite arm spacing was correlated with (GV)(-0.4) in all cooling rate ranges. The degree of elemental segregation increased and then decreased with increasing cooling rate. The size and morphology of gamma ' precipitates, carbides, and inclusions changed with the solidification rate.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jingxia Sun, Chao Chen, Jinlai Liu, Jinguo Li
Summary: This study investigated the isothermal oxidation behavior and microstructure stability of two alloys with and without Ru at 900°C, 1000°C, and 1100°C. The addition of Ru significantly decreased the oxidation resistance, leading to the formation of a multilayered oxide scale consisting of NiO, spinel, and Al2O3. The oxidation rate was highest at 1100°C due to severe cracking and peeling of the oxide scale. Compared to the Ru-free alloy, the Ru-containing alloy had a thicker oxide layer and more serious spallation, with Ru oxide found in the spinel layer. Surprisingly, a large number of TCP phases were observed in the alloy matrix, especially in the 2Ru alloy, indicating a decline in microstructure stability caused by poor oxidation resistance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Hao Yu, Sosuke Kondo, Ryuta Kasada, Shigeharu Ukai
Summary: To increase the ductility of alumina-forming Co-Cr-Al oxide dispersion strengthened (ODS) superalloys, Ni alloying was introduced. Four grades of Co-20Cr-15Al-xNi (x = 0, 10, 20 and 30) at.% ODS superalloys were fabricated. The addition of Ni inhibited the formation of brittle phase and facilitated ductile fracture, leading to improved strength and ductility.
MATERIALS CHARACTERIZATION
(2023)
Article
Engineering, Biomedical
Nikhil Anand, Kaushik Pal
Summary: In this study, the mechanical properties and corrosion resistance of Zn-Mg composite were improved through alloying and coating, demonstrating its potential for biomedical applications.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2022)
Article
Engineering, Biomedical
Nikhil Anand, Kaushik Pal
Summary: This study improves the mechanical properties and degradation rate of Zn-Mg composite by adding alloying elements Mn and HA, as well as a polymer-ceramics nanofiber coating. The coated samples show excellent blood and cell compatibility.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2022)
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
Dong-Min Kim, Chiwon Kim, Cheol-Hyeok Yang, Ji-Un Park, Hi-Won Jeong, Kwang-Hyuk Yim, Hyun-Uk Hong
Summary: This study investigated the influence of heat treatment on the microstructure and high-temperature mechanical properties of Inconel 740H superalloy. Various heat treatments were conducted, and the samples exhibited similar gamma-matrix with spherical gamma' particles. The fractions of carbides at the grain boundaries varied, and the samples showed similar microhardness and tensile properties. Thermal exposure and creep tests revealed differences in the growth of gamma', microhardness, and creep life of the samples. The presence of MC carbides in the sample helped accommodate stress exerted on grain boundaries. (c) 2023 Elsevier B.V. All rights reserved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Miao Huo, Lin Liu, Wenchao Yang, yafeng Li, Songsong Hu, Haijun Su, Jun Zhang, Hengzhi Fu
JOURNAL OF MATERIALS RESEARCH
(2019)
Article
Materials Science, Multidisciplinary
Quanzhao Yue, Lin Liu, Wenchao Yang, Chuang He, Dejian Sun, Taiwen Huang, Jun Zhang, Hengzhi Fu
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2019)
Article
Nanoscience & Nanotechnology
Quanzhao Yue, Lin Liu, Wenchao Yang, Taiwen Huang, Jun Zhang, Hengzhi Fu
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Materials Science, Multidisciplinary
Dejian Sun, Lin Liu, Taiwen Huang, Wenchao Yang, Chuang He, Zhuoran Li, Jun Zhang, Hengzhi Fu
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
Guangyu Li, Wenming Jiang, Wenchao Yang, Zailiang Jiang, Feng Guan, Haixiao Jiang, Zitian Fan
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
Wenchao Yang, Songsong Hu, Miao Huo, Dejian Sun, Jun Zhang, Lin Liu
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2019)
Article
Materials Science, Multidisciplinary
Wenchao Yang, Pengfei Qu, Ruirong Zhang, Jiarun Qin, Chen Liu, Jun Zhang, Lin Liu
Summary: The three-dimensional atom-probe tomography was used to characterize the interface structure of the gamma/gamma' in a third-generation Ni-based single crystal superalloy with Re addition, revealing an element-segregation layer with Re, Co, and Cr in the gamma phase close to the interface which resulted in a more negative local interface misfit. Additionally, it was deduced that the presence of harmful topologically close-packed phases might be facilitated by the co-segregation of Re, Co, and Cr, and the depletion of Ni near the interface.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Songsong Hu, Lin Liu, Wenchao Yang, Dejian Sun, Miao Huo, Yafeng Li, Taiwen Huang, Jun Zhang, Haijun Su, Hengzhi Fu
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2019)
Article
Chemistry, Physical
Pengfei Qu, Wenchao Yang, Jiarun Qin, Chen Liu, Kaili Cao, Jun Zhang, Lin Liu
Article
Materials Science, Multidisciplinary
Xiao-juan Wang, Lin Liu, Tai-wen Huang, Wen-chao Yang, Quan-zhao Yue, Chuang He, Jun Zhang, Heng-zhi Fu
Article
Chemistry, Physical
Cheng Ai, Liguo Xi, Bo Wang, Yanghui Sun, Jun Zhang, Haijun Su, Wenchao Yang, Lin Liu, Zhiping Sun, Yongnan Chen
Article
Chemistry, Physical
Chuang He, Lin Liu, Taiwen Huang, Wenchao Yang, Jun Zhang, Min Guo, Hengzhi Fu
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Chemistry, Applied
Hui Zhao, Jinlei Gu, Yuliang Gao, Qian Hou, Zengying Ren, Yaqin Qi, Kun Zhang, Chao Shen, Jun Zhang, Keyu Xie
JOURNAL OF ENERGY CHEMISTRY
(2020)
