Article
Materials Science, Multidisciplinary
Hansong Ji, Munish Kumar Gupta, Qinghua Song, Wentong Cai, Tao Zheng, Youle Zhao, Zhanqiang Liu, Danil Yu Pimenov
Summary: This study evaluates the microstructure and machinability of SLM fabricated IN718 during micro milling processes, comparing it with wrought IN718. Micro milling experiments were conducted with varying spindle speed and feed rate, and comparisons were made for tool wear, surface roughness, residual stress, and micro hardness.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
Ying Li, Jaromir Dlouhy, Jaroslav Vavrik, Jan Dzugan, Pavel Konopik, Tomas Krajnak, Jozef Vesely
Summary: The short-term creep performance of a coarse-grained Inconel 718 alloy fabricated using Directed energy deposition (DED) technique was investigated. The study found that superior creep strength and ductility can be achieved through specific heat treatment and sample orientation. The process-induced dislocation substructure and irregular columnar grains were found to contribute to the superior creep behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Civil
Guiru Meng, Yadong Gong, Jingdong Zhang, Zongze Jiang, Qizhen Ren, Jibin Zhao
Summary: This paper systematically investigates the microstructure, crystal structure, and related mechanical properties of Inconel 718 thin walls prepared by two different laser additive manufacturing methods (LDED and SLM) and compares them with conventional forged parts. The study found that there are differences in crystallographic texture between SLM and LDED parts, resulting in different mechanical property anisotropy.
THIN-WALLED STRUCTURES
(2023)
Article
Nanoscience & Nanotechnology
J. J. Shi, S. A. Zhou, H. H. Chen, G. H. Cao, A. M. Russell, Z. J. Zhou, X. B. Qi, C. P. Li, G. F. Chen
Summary: The study found that in SLMed Inconel 718 alloy, the grain size remained stable during creep, with vertical samples having a longer creep rupture life, while stress concentration at transverse grain boundaries led to intergranular fracture failure in both building orientational samples. The anisotropy of creep behavior could not be eliminated by the present heat treatment schedule.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Kai Chen, Jianxin Dong, Zhihao Yao
Summary: This study investigated the creep behavior and damage mechanisms of 718 alloys at different temperatures. The results showed different creep curves and failure mechanisms of the alloy at different temperatures. The softening and loss of mechanical performance of the alloy were mainly attributed to the coarsening or decrease of strengthening precipitates.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Zhiyun Wang, Zhanyong Zhao, Bin Liu, Pengcheng Huo, Peikang Bai
Summary: This study investigated the compressive deformation behavior of porous Inconel 718 alloy prepared using selective laser melting (SLM), with a focus on tetrahedral and diamond porous structures. The results revealed that tetrahedral porous structures showed better compression properties due to the reinforcement effect of horizontal beams, enhancing the stiffness and strength of the material. Diamond porous structures, on the other hand, exhibited uniform stress distribution under compression load, leading to upsetting deformation.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Chemistry, Physical
Xiaoping Liu, Kuaishe Wang, Ping Hu, Xiaomei He, Baicheng Yan, Xuzhao Zhao
Summary: In this study, selective laser melting (SLM) technology was successfully used to prepare Inconel 718 samples, and the influences of different input laser energy density on the samples' properties were explored. It was found that increasing the input laser energy density within a certain parameter range improved the formability, microstructures, and mechanical properties of the printed samples.
Article
Materials Science, Multidisciplinary
Jinjun Xu, Zhongqi Hao, Zhenghong Fu, Xingdao He, Hui Wang, Guili Xu
Summary: Slow strain rate tensile tests under in situ hydrogen electrochemical charge were conducted to investigate the hydrogen embrittlement behavior of selective laser-melted (SLM) and post-heat-treated Inconel 718 alloys, along with microstructure evolution and cracking feature characterization. The study found that the high density of dislocations and local strain along the cellular structure walls in the as-SLM sample increased local hydrogen concentration, resulting in cracks along the cell walls. The precipitation of g0, g00, and 8 phases generated by solution aging significantly enhanced the tensile strength and HE susceptibility, with the 8 phase formation along the grain boundaries and cell walls leading to 8/g interface cracking in solution-aged samples.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
M. Godec, S. Malej, D. Feizpour, C. Donik, M. Balazic, D. Klobcar, L. Pambaguian, M. Conradi, A. Kocijan
Summary: The hybrid fabrication process of Inconel 718 test parts using SLM and DED technologies was analyzed in detail, with a focus on ensuring mechanical property consistency and evaluating microstructures and mechanical properties to understand property-controlling mechanisms. A custom solution treatment and aging method was introduced to dissolve the Laves phase present in DED parts, which improved mechanical properties. Good bonding between SLM and DED parts, along with prevention of delta-phase precipitation in the DED process, are essential for producing high-value metallic products for space applications through hybrid AM.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Wei Le, Zhongwei Chen, Sufyan Naseem, Kang Yan, Yanni Zhao, Haolan Zhang, Qinglin Lv
Summary: In this study, the hot deformation behavior, microstructure evolution, and dynamic recrystallization (DRX) behavior of selective laser melted (SLM) 718 alloy were investigated using isothermal compression testing, electron back scattered diffraction (EBSD) technology, and transmission electron microscope (TEM). The results reveal that the deformation condition has a significant impact on the flow behavior and DRX grain of the alloy. Increasing the deformation temperature or decreasing the strain rate leads to an increase in the volume fraction and average size of DRX grains. The DRX mechanism of SLM 718 alloy involves discontinuous dynamic recrystallization (DDRX) characterized by initial grain boundary and regenerated grain boundary bulging, and continuous dynamic recrystallization (CDRX) occurring inside the grain characterized by progressive subgrain rotation and homogeneous misorientation increase.
Article
Engineering, Manufacturing
Sasidharan Periane Natarajan, S. Vaudreuil, H. Chibane, A. Morandeau, M. Anthony Xavior, J. Cormier, R. Leroy, A. Duchosal
Summary: Tool life experiments were conducted on Inconel 718 alloy, comparing samples produced through conventional casting and forging techniques and laser powder bed fusion techniques. The study found that microstructural features had an impact on tool life, with the SLM HIP-AHT sample demonstrating better performance than the SLM HIP and C&W samples.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Nanoscience & Nanotechnology
J. J. Shi, Z. Q. Zhou, K. Xu, G. Y. Zhou, Z. J. Zhou, C. P. Li, G. F. Chen, X. G. Lu, G. H. Cao
Summary: This study investigates the effect of heat treatment on the microstructure and small punch creep property of Inconel 718 alloy fabricated by selective laser melting (SLM). The results show that a higher temperature solution treatment can eliminate stress concentration and lead to grain transformation and recrystallization. The distribution of grain boundaries and twin boundaries affects the creep life and fracture mode.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Ateekh Ur Rehman, Yusuf Usmani, Ali M. Al-Samhan, Saqib Anwar
Summary: Nickel-based superalloys demonstrate excellent high temperature performance, showing high tensile strength and good tensile ductility in room temperature tests. Joining two different nickel-based superalloys using rotary friction welding produced defect-free metallurgical joints.
Article
Materials Science, Multidisciplinary
Hansong Ji, Qinghua Song, Runqiong Wang, Wentong Cai, Zhanqiang Liu
Summary: This article presents a study on the pore defects in metallic materials during the selective laser melting (SLM) process. Through statistical-theory-based grain-scale simulations, the pore effects and their influence mechanisms on material properties were investigated. The study also developed and verified mechanical and damage property prediction models for grains with pore defects, demonstrating good accuracy in predicting damage resistance and strength properties.
MATERIALS & DESIGN
(2022)
Article
Nanoscience & Nanotechnology
Qian Wang, Shuxin Ge, Dayong Wu, Haikun Ma, Jie Kang, Meng Liu, Tao Wang, Balaji Narayanaswamy, Ru Su
Summary: In this study, the microstructural evolution and creep behavior of Inconel 718 alloy under different temperatures and stresses were comprehensively investigated. The results revealed that temperature and stress exerted significant influences on the creep process, leading to accelerated creep rates and reduced creep life of the material. Phase transformations, void formation, and crack propagation were found to play important roles during creep deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Xing Li, J. J. Shi, C. H. Wang, G. H. Cao, A. M. Russell, Z. J. Zhou, C. P. Li, G. F. Chen
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Materials Science, Multidisciplinary
G. H. Cao, T. Y. Sun, C. H. Wang, Xing Li, M. Liu, Z. X. Zhang, P. F. Hu, A. M. Russell, R. Schneider, D. Gerthsen, Z. J. Zhou, C. P. Li, G. F. Chen
MATERIALS CHARACTERIZATION
(2018)
Article
Materials Science, Multidisciplinary
X. Li, J. J. Shi, G. H. Cao, A. M. Russell, Z. J. Zhou, C. P. Li, G. F. Chen
MATERIALS & DESIGN
(2019)
Article
Chemistry, Physical
Ke Liu, Huichen Yu, Xing Li, Sujun Wu
Summary: Experimental investigation of reaction diffusion kinetics in Al-Cu binary systems at solid-state temperatures revealed the formation of intermetallic compounds with different compositions, showing parabolic growth in thickness. Quantitative analysis of the composition and characterization of properties using electron probe microanalysis and nanoindentation techniques were conducted to evaluate diffusion coefficients, activation energies, hardness, Young's modulus, and creep stress index of the IMCs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)