Article
Materials Science, Multidisciplinary
Jingfan Cheng, Bing Li, Qizhou Cai, Bingyi Zhao, Can Xu, Zhe Chen
Summary: TiN nanoparticles have a significant impact on the properties of Al2024-2TiN composite, increasing tensile strength but decreasing yield strength and elongation. The introduction of TiN nanoparticles also promotes aging kinetics and reduces the average grain size of the composite.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Ceramics
Zhiyong Wang, Jianping Wang, Yongsai Xu, Mingdong Yi, Guangchun Xiao, Zhaoqiang Chen, Jingjie Zhang, Hui Chen, Chonghai Xu
Summary: The impact of sintering rate on the microstructure and mechanical properties of cermets was explored using ultrafast sintering. The results showed that an appropriate heating rate could achieve rapid densification and inhibit abnormal grain growth, leading to excellent mechanical properties in (Ti, W)C cermets.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Tao Xiang, Zeyun Cai, Peng Du, Kun Li, Zongwei Zhang, Guoqiang Xie
Summary: The NbTaTiZr high-entropy alloys prepared by mechanical alloying (MA) and spark plasma sintering (SPS) exhibit excellent mechanical properties with a dual-phase BCC structure and nano-scale grain size. The compressive fracture strength reaches the highest at 2511+/-78 MPa at a sintering temperature of 800 degrees C, while the highest fracture strain is achieved at 12.8% at 1000 degrees C.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Qing Liu, Guofeng Wang, Xiaochong Sui, Ye Xu, Yongkang Liu, Jianlei Yang
Summary: TixVNbMoTa refractory high-entropy alloys were prepared through MA and SPS, and the effect of Ti content on their microstructures and mechanical properties was investigated. Increasing Ti content resulted in larger grain sizes and volume fractions of the matrix and precipitation phases, while also decreasing the density of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Elder Soares, Nadege Bouchonneau, Elizeth Alves, Kleber Alves, Oscar Araujo Filho, David Mesguich, Geoffroy Chevallier, Christophe Laurent, Claude Estournes
Summary: The study utilized commercial AA7075 aluminum alloy powder to prepare dense samples by Spark Plasma Sintering, with results showing that samples prepared using ball-milled powder exhibited higher hardness and transverse fracture strength values, reflecting a finer microstructure.
Article
Chemistry, Multidisciplinary
Amanendra K. Kushwaha, Manoranjan Misra, Pradeep L. Menezes
Summary: This study investigated the effect of cryomilling on the crystallite size of pure aluminum and magnesium-doped aluminum, and the subsequent improvement in mechanical properties. The results showed that the addition of magnesium and longer cryomilling duration led to a significant reduction in crystallite size, resulting in improved hardness of the materials.
Article
Materials Science, Multidisciplinary
Ruizhi Chen, Su Zheng, Rui Zhou, Bangzheng Wei, Guang Yang, Pengqi Chen, Jigui Cheng
Summary: The study investigates the use of high-entropy alloys as a novel binder to fabricate cemented carbides, resulting in higher hardness and finer grain size compared to traditional cemented carbides with cobalt as binder. HEA shows potential to replace conventional cobalt as a new binder in industrial applications.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Materials Science, Ceramics
Xing Jin, Chenjun Tang, Qinggui Li, Dong Wang, Xiang Ding, Songlin Ran
Summary: Nearly fully dense B4C-VB2 composite ceramics were prepared by reactive spark plasma sintering (SPS) technology, and the effects of the degassing time on the microstructure and mechanical properties were investigated. The optimal degassing time of 6 min resulted in excellent comprehensive performance of the final product.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
E. A. Lantsev, N. Malekhonova, A. Nokhrin, V. N. Chuvil'deev, M. S. Boldin, P. Andreev, K. E. Smetanina, Yu Blagoveshchenskiy, N. Isaeva, A. A. Murashov
Summary: The study investigates the kinetics of spark plasma sintering of tungsten carbide nanopowders and the influence of additives on the alloy properties. Ultimately, hard alloy materials with improved mechanical characteristics were obtained.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
C. H. Suresh Vidyasagar, D. Benny Karunakar
Summary: The research investigated the effects of nano yttrium and SPS mechanism on the properties of AA2024-Y nanocomposites. It was found that adding 0.3% nano yttrium significantly improved the hardness, yield strength, and tensile strength of the composite materials. After reaching an optimal level, further increasing the nano yttrium content led to a decrease in mechanical properties. By adjusting the amount of nano yttrium, the performance of the composites can be optimized.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Xiao-Tong Jia, Zhao-Hui Zhang, Tian-Hao Xu, Luo-Jin Liu, Yuan-Hao Sun, Xian-Yu Li, Qiang Wang, Zhao-Hu Jia, Yang-Yu He, Xing-Wang Cheng
Summary: Aluminum oxynitride ceramics doped with different sintering aids were synthesized, and their microstructures, mechanical, and optical properties were investigated. The results showed that the optimal amount of sintering aids was 0.06 wt% La2O3 + 0.16 wt% Y2O3 + 0.30 wt% MgO. The addition of La3+ and Mg2+ decreased grain boundary migration, promoted pore elimination, and inhibited grain growth. The addition of Y3+ facilitated liquid-phase sintering. Furthermore, the addition of Mg2+ effectively promoted twin formation, hindering crack propagation and dislocation motion. The doped AlON ceramic exhibited excellent mechanical and optical properties.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Precious Manti Radingoana, Sophie Guillemet-Fritsch, Jacques Noudem, Peter Apata Olubambi, Geoffroy Chevallier, Claude Estournes
Summary: In this study, Al-doped ZnO ceramics were sintered at varying temperatures, pressures, and pressure application temperatures using spark plasma sintering. The ceramics achieved a maximum relative density of 98.9% at a temperature of 650 degrees Celsius and pressure of 250 MPa. The Al-doped ZnO ceramics exhibited enhanced electrical conductivity, decreased Seebeck coefficient, and reduced thermal conductivity, resulting in a ZT value of 0.016 at 500 degrees Celsius.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Xiao-Tong Jia, Zhao-Hui Zhang, Xian-Yu Li, Tian-Hao Xu, Luo-Jin Liu, Qiang Wang, Zhao-Hu Jia, Xing-Wang Cheng
Summary: In this study, AlON ceramics were prepared using spark plasma sintering (SPS) technique. The effects of SPS parameters on the microstructures and mechanical properties were systematically investigated. It was found that when sintered at 1580°C with a pressure of 50 MPa and a holding time of 5 minutes, the AlON ceramics exhibited excellent mechanical and optical performances.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Engineering, Chemical
P. S. Ninawe, S. Ganesh, P. Sai Karthik, S. B. Chandrasekhar, R. Vijay
Summary: Austenitic oxide dispersion strengthened (AODS) steel was fabricated using two-stage ball milling and consolidation through spark plasma sintering (SPS). The effect of SPS temperature on density, microstructure, and mechanical properties of the consolidated samples was investigated, demonstrating the best combination of strength and elongation achieved on AODS alloys processed using MA and SPS.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Yun Shi, Oleg Shichalin, Yifei Xiong, Denis Kosyanov, Tong Wu, Qian Zhang, Ling Wang, Zhenzhen Zhou, Hui Wang, Jinghong Fang, Huan He, Jinqi Ni, Chaoyue Wang, Qian Liu, Jianding Yu, Sheng Cui, Haibo Wang, Anton Belov, Eugeniy Papynov
Summary: Ce3+ doped Lu3Al5O12 ceramics were successfully fabricated by SPS, and their properties such as grain size and photoluminescence were investigated. The results showed that the SPS ceramics had smaller grain size, excellent thermal stability, and higher radioluminescence intensity.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Baosheng Guan, Minggang Xu, Xiaoshan Yang, Yuzhao Zhou, Chun Li, Yaqi Ji, Xue Liu, Jinfeng Li, Dou Wang, Jingang Tang, Guomin Le
Summary: In this study, a laser melting deposition (LMD) additive manufacturing process was used to fabricate tantalum with excellent properties, mainly attributed to the solid solution strengthening of nitrogen and oxygen interstitials. The tantalum samples showed high hardness and ductility, with ultimate tensile strength above 400 MPa and elongations of about 14-16%, suitable for various industrial applications.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Chao Wei, Zhuang Zhao, Han Ye, Yang Yang, Jingang Tang, Xianfeng Shen, Guomin Le
Summary: High-performance tungsten alloys fabricated through laser-directed energy deposition (LDED) with optimized post-heat treatments exhibit superior tensile strength and ductility. The mechanical properties of these alloys are comparable to or even better than those produced by powder metallurgy methods. Short-time heat treatments can further improve the mechanical properties of the alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Liufei Huang, Yaoning Sun, Na Chen, Hengwei Luan, Guomin Le, Xue Liu, Yaqi Ji, Yiping Lu, Peter K. Liaw, Xiaoshan Yang, Yuzhao Zhou, Jinfeng Li
Summary: In this study, AlCoCrFeNi2.1 eutectic high-entropy alloy was prepared using laser metal deposition (LMD) technique. The LMD-fabricated alloy showed significantly enhanced tensile strength and increased ductility compared to conventionally cast samples. The improved mechanical properties were attributed to the refinement of the uniformly distributed eutectic structure.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Hui Wang, Zhaoxi Cao, Ziyuan Gao, Cunyu Wang, Jianxiong Liang, Andy Godfrey, Ling Zhang, Guilin Wu, Wenquan Cao
Summary: The deformation response of a (Nb, V) micro-alloyed FeMnAlC low density steel has been investigated as a function of grain size. Tensile testing and electron microscopy were used to characterize the mechanical properties and microstructure. The results show that the yield stress is strongly dependent on the initial grain size, while the friction stress and Hall-Petch slope vary with the level of applied tensile strain. Based on these findings, a model is proposed to simulate the stress-strain curves during tensile deformation of the low-density steel.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Multidisciplinary Sciences
Yan Chong, Reza Gholizadeh, Tomohito Tsuru, Ruopeng Zhang, Koji Inoue, Wenqiang Gao, Andy Godfrey, Masatoshi Mitsuhara, J. W. Morris, Andrew M. Minor, Nobuhiro Tsuji
Summary: Interstitial oxygen embrittles titanium, particularly at cryogenic temperatures, which necessitates a stringent control of oxygen content in fabricating titanium and its alloys. A structural strategy, via grain refinement, has been proposed to alleviate this problem. The unique synergy of strength and ductility in the ultrafine-grained (UFG) Ti-0.3wt.%O is achieved through diluted grain boundary segregation of oxygen and enhanced dislocation activities, resulting in improved grain boundary cohesive energy and excellent strain hardening ability. This strategy not only promotes the potential applications of high strength Ti-O alloys at low temperatures but can also be applied to other alloy systems.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
M. Adil Mehmood, Khurram Shehzad, M. Mujahid, Talha Bin Yaqub, Andy Godfrey, Filipe Fernandes, F. Z. Muhammad, Khurram Yaqoob
Summary: This study focuses on improving the strength-ductility balance of the well-studied CoCrFeNi high entropy alloy (HEA) by adding varying amounts of SiC. The microstructural changes and mechanical properties of the resulting composites are investigated.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
M. Adil Mehmood, Mohammad Mujahid, Andy Godfrey, Muhammad Farooq Zafar, Khurram Yaqoob
Summary: This study aims to develop materials with better combinations of strength and ductility by adding TiB2 to the CoCrFeNi high entropy alloy (HEA). The interaction between titanium diboride (TiB2) and chromium in the HEA matrix during melting resulted in the in-situ formation of chromium borides with plate morphology. The mechanical characterization of the developed composites showed a wide range of mechanical properties, with excellent combinations of strength and ductility achieved by adding 6 wt% TiB2.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Wei-Yi Wang, Andrew Godfrey, Wei Liu
Summary: 316L stainless steel samples were prepared by selective laser melting and annealed to investigate the microstructural evolution and the effect of annealing on mechanical properties. The results showed that the as-printed materials had a stable dislocation cell substructure, and coarsened oxide particles acted as obstacles for dislocation and grain boundary movement, thus affecting the recovery and recrystallization process. The evolution of mechanical properties during annealing was closely related to the observed microstructural changes, indicating the possibility of optimizing the strength and ductility of SLM-prepared metal samples through appropriate heat treatments.
Article
Materials Science, Multidisciplinary
Yan Chong, Reza Gholizadeh, Baoqi Guo, Tomohito Tsuru, Guohua Zhao, Shuhei Yoshida, Masatoshi Mitsuhara, Andrew Godfrey, Nobuhiro Tsuji
Summary: It has been found that grain refinement in the Ti-12Mo alloy leads to a decrease in ultimate tensile strength due to the softening effect of strain-induced α martensite phase. However, the addition of oxygen along with grain refinement in the Ti-12Mo-0.3O alloy results in a significant enhancement in both strength and ductility. This study provides valuable insights for the design of strong and tough metastable /3 titanium alloys.
Article
Engineering, Mechanical
Xueliang An, Zhiyue Shi, A. Godfrey, Jinku Yu, Feng Yu, Hui Wang, Haifeng Xu, Cunyu Wang, Wenquan Cao
Summary: The rolling contact fatigue (RCF) of high carbon through-hardening bearing steel (SAE52100) and low carbon case-hardening bearing steel (SAE4320) was studied. The RCF-life for SAE4320 was approximately 7.0 x 10^7 cycles, about 7 times higher than the RCF-life for SAE52100, which was around 1.0 x 10^7 cycles. Despite having larger inclusion size, SAE4320 showed better performance in terms of carbide size, prior austenite grain size, and retained austenite (RA) volume fraction compared to SAE52100. This suggests that a combination of smaller inclusion size and improved microstructure contributed to the enhanced RCF-life of SAE4320.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Nanoscience & Nanotechnology
Hui Wang, Cunyu Wang, Jianxiong Liang, Andy Godfrey, Yuhui Wang, Yuqing Weng, Wenquan Cao
Summary: This study investigated the effects of alloying content on the microstructure, density, and mechanical properties of low-density steels. The results showed that alloy content significantly influenced the microstructure and density of the steels, as well as the yield strength, work hardening rate, and impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Yubin Zhang, Tianbo Yu, Ruqing Xu, Jesper Thorborg, Wenjun Liu, Jon Tischler, Andy Godfrey, Dorte Juul Jensen
Summary: The intragranular strains and microstructure within recrystallizing grains in single phase pure iron have been studied using synchrotron micro-diffraction. Residual elastic strains of up to 1-2 x 10(-3) were observed in the recrystallizing grains, contradicting common knowledge. The local strain variations within individual grains can be similar in magnitude to those between different grains. The effects of processing and microstructural parameters on the development of local residual elastic strains and microstructure have been quantified.
MATERIALS CHARACTERIZATION
(2022)
Proceedings Paper
Metallurgy & Metallurgical Engineering
A. Godfrey, W. Q. Gao, G. M. Le, C. L. Zhang, K. N. Zhu
Summary: This study explores the influence of grain size heterogeneity on plastic deformation in aluminum prepared by spark plasma sintering. It is found that well-mixed samples follow the rule-of-mixtures in yield strength, while macroscopically layered arrangements of coarse and fine grains result in deformation mainly occurring in the fine grain regions.
42ND RISO INTERNATIONAL SYMPOSIUM ON MATERIALS SCIENCE: MICROSTRUCTURAL VARIABILITY: PROCESSING, ANALYSIS, MECHANISMS AND PROPERTIES
(2022)
Proceedings Paper
Metallurgy & Metallurgical Engineering
S. Sun, C. F. Zhang, W. Q. Gao, A. Godfrey
Summary: By adjusting the composition ratio and powder sizes, the phase composition and distribution in Al-Cu alloys can be controlled. Smaller powders tend to form near-equilibrium phase structures, while larger powders result in metastable microstructures.
42ND RISO INTERNATIONAL SYMPOSIUM ON MATERIALS SCIENCE: MICROSTRUCTURAL VARIABILITY: PROCESSING, ANALYSIS, MECHANISMS AND PROPERTIES
(2022)
Proceedings Paper
Metallurgy & Metallurgical Engineering
W. Y. Wang, W. Q. Gao, S. Sun, A. Godfrey
Summary: This study investigates the strain distribution and microstructure evolution of 316L stainless steel samples prepared by selective laser melting (SLM) using digital image correlation (DIC) and electron backscatter diffraction (EBSD). The results show that plastic strain is non-uniformly distributed at various length scales, with no obvious correlation to grain size, grain morphology, or cellular structure orientation formed during SLM.
42ND RISO INTERNATIONAL SYMPOSIUM ON MATERIALS SCIENCE: MICROSTRUCTURAL VARIABILITY: PROCESSING, ANALYSIS, MECHANISMS AND PROPERTIES
(2022)
