Article
Materials Science, Multidisciplinary
Yunlong Ma, Yuanchun Huang, Xieyi Zhang
Summary: The study focused on the precipitation thermodynamics and kinetics of the second-phase in the quenched Al-Zn-Mg-Cu-Sc-Zr-Ti alloy. It was found that the eta' phase is the dominant strengthening phase, although it can increase electrical conductivity at high temperatures, it also reduces hardness.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Jingyu Jiang, Feng Jiang, Menghan Zhang, Zhongqin Tang, Mengmeng Tong
Summary: The Al-6 Mg-0.4Mn-0.25Sc-0.1Zr extrusion rod underwent ECAP treatment to achieve nonuniform structure. After annealing at different temperatures, it was observed that the hardness of the samples decreased, with the 1P sample experiencing a faster decrease compared to the 0P sample, resulting in a hardness "upside down" phenomenon. The drastic recrystallization induced by high strain in the shear band was identified as the cause of these phenomena.
MATERIALS CHARACTERIZATION
(2021)
Letter
Materials Science, Multidisciplinary
Xing-Quan Wang, Yu Wang, Qian Jia, Zhao-Chong Ding, Jin-Jiang He, Song-Xiao Hui
Summary: Al-Sc alloys with high Sc contents were found to exhibit feathery Al3Sc grains with twin relationships. The microstructure of these alloys has significant effects on the sputtering process and the quality of functional devices. Through quantitative analysis using electron backscatter diffraction (EBSD) technique, it was revealed that the twinning plane is parallel to {111} planes and growth direction is along <110> directions in Al3Sc. The occurrence of twinned structures is influenced by both the Sc content and cooling rate, with higher Sc content and faster cooling rates leading to higher density of twin boundaries.
Article
Materials Science, Multidisciplinary
Yuqiao Sun, Yuhong Luo, Qinglin Pan, Bing Liu, Liang Long, Weiyi Wang, Ji Ye, Zhiqi Huang, Shengqian Xiang
Summary: The addition of Sc element in Al-Zn-Mg-Cu-Zr alloy contributes to significant grain refinement, increased strength and hardness, as well as improved resistance to corrosion, with lower tendency and slower rates of corrosion observed.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Yao Li, Guofu Xu, Shichao Liu, Baofeng Wang, Xiaoyan Peng
Summary: In this study, the anisotropy of the Al-Zn-Mg-Sc-Zr alloy sheet in the peak-aged state was analyzed, showing that grain orientation and Schmid factor significantly affect the alloy properties. Samples at 0 degrees and 90 degrees have higher strength but lower elongation due to wider distribution of Schmid factors, while samples at 45 degrees and 60 degrees have lower strength but higher elongation due to narrower distribution of Schmid factors.
MATERIALS CHARACTERIZATION
(2021)
Article
Engineering, Manufacturing
Priyanka Agrawal, Sanya Gupta, Saket Thapliyal, Shivakant Shukla, Ravi Sankar Haridas, Rajiv S. Mishra
Summary: In-depth analysis of the microstructure of an AM alloy revealed promising properties for structural applications, with improved strength and ductility due to the presence of precipitates. The study utilized advanced microscopy techniques to study the microstructure and understand the mechanisms behind the enhanced tensile properties.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Mengmeng Tong, Feng Jiang, Huiling Wang, Jingyu Jiang, Mingjin Wu, Zhongqin Tang
Summary: The research shows that the Al-Mg-Mn-Sc-Zr alloy softens significantly at high temperatures due to a decrease in dislocation density, changes in grain boundaries, and the thermal activation promoting dislocation movements and grain boundary softening. Additionally, the dispersed nano-sized Al3(Sc,Zr) particles formed by adding trace amounts of Sc and Zr have strong inhibition effects, but their effectiveness weakens at higher temperatures, leading to a substantial reduction in flow stress.
MATERIALS CHARACTERIZATION
(2021)
Article
Metallurgy & Metallurgical Engineering
Jing-yu Jiang, Feng Jiang, Meng-han Zhang
Summary: Through friction stir welding (FSW), the Al-Mg-Sc-Zr alloy undergoes changes in microstructure and mechanical properties. Grains adjacent to the welding region are bent, the texture of the rolled sheet is gradually alleviated, and the distribution and shape of Al3(Sc,Zr) particles are altered.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Nanoscience & Nanotechnology
Yang Yang, Stephen A. Hackney, Paul G. Sanders
Summary: Additions of Sc and Zr in the Al matrix offer significant strengthening potential at elevated temperatures due to the formation of coarsening resistant precipitates. The high-temperature properties of a supersaturated Al-0.4Sc-0.4Zr at% alloy were found to be superior to a dilute Al-0.06Sc-0.06Zr at% alloy, primarily due to the larger amount of solute resulting from rapid solidification. The deformation mechanism at elevated temperatures was identified as dislocation climb in both alloys, and the larger threshold stress in the supersaturated alloy was attributed to its unique microstructure.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Yang Yang, Joseph J. Licavoli, Stephen A. Hackney, Paul G. Sanders
Summary: Accelerated coarsening was observed in the extruded melt-spun ribbon with larger precipitate size and higher precipitate volume fraction than in melt-spun ribbon. The accelerated effective diffusivity after extrusion was explicitly linked to the initially refined extruded microstructure. Predictions using the Umantsev-Olson-Kuehman-Voorhees model for ternary alloys showed good agreement with experimental results by considering changes in diffusivity and precipitate volume fraction.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
P. Sankanit, V. Uthaisangsuk, P. Pandee
Summary: The effects of micro-alloyed Mn, Sc, and Zr on the mechanical properties of Al-Ni alloys were studied. It was found that Mn alloying significantly improved the hardness of the alloy, while the addition of Sc and Zr increased the hardness and coarsening resistance. The alloy with added Sc and Zr showed the greatest potential for use as a load bearing structure at elevated temperatures.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Yue Wu, Yang Tang, Ya Zhang, Fei Xiao, Yanling Xue, Hui Xing, Jiao Zhang, Baode Sun
Summary: The specific behavior of grains nucleation on primary Al3Sc particles and its effects on subsequent nucleation events were observed for the first time by synchrotron radiography. It was found that grains can nucleate on one face and grow along other faces of relatively large cuboid Al3Sc particles, which leads to incomplete engulfment of particles. This discovery modifies the previous common view on the role of particles between grain boundaries and enlightens the better application of flow-induced technologies to the refinement of Sc-inoculated Al alloys.
Article
Materials Science, Multidisciplinary
Cui Jianzhong, Wang Zhao, Wang Chunxin, Wang Fuyue, Wang Xiangjie
Summary: The dissolution behaviors of Cu-20wt%Sc master alloy in liquid Al-0.12wt%Zr alloy were studied, showing changes in particle size, areal fraction, solubility, and microstructure with different holding times and temperatures.
RARE METAL MATERIALS AND ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Chunxin Wang, Chenchi Qu, Jianshe Chen, Binchuan Li, Kuiren Liu, Shicheng Wei, Xiaocai He, Qing Han
Summary: This paper presents the synthesis and characterization of Al-0.35Cu-0.18Sc-0.06Zr alloys with remarkable electrical and mechanical properties. The alloy exhibits high electrical conductivity of 60.4%IACS and strong tensile strength of 169.46 MPa. Microscopic analysis shows the presence of fine bean-petal shaped Al-3(Sc, Zr) particles as the second phase, which are highly cohered with the matrix and contribute to improved toughness. The heat resistance test results also demonstrate the alloy's stability at elevated temperatures.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Pan Deng, Wenfeng Mo, Zuoqiong Ouyang, Chenglu Tang, Binghui Luo, Zhenhai Bai
Summary: In order to develop high-strength and excellent corrosion resistance Al-Cu-Mg alloys for aircraft skins in aerospace, this study investigated the mechanical properties, corrosion behaviors, and microstructures of 2024 (Al-3.78Cu-1.27 Mg) and 2024SZ (Al-3.74Cu-1.17 Mg-0.1Sc-0.2Zr) alloys. The results show that the addition of (Sc, Zr) transformed the microstructure of the alloy, leading to improved mechanical properties and enhanced corrosion resistance. The present investigation provides a comprehensive understanding of the strengthening and corrosion mechanisms in Al-Cu-Mg alloy.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Zhonglun Zhang, Yufan Wu, Ji Gu, Min Song
Summary: This study investigates the influence of Si and N additions on the microstructural evolution and tensile properties of FeCoCrNiMn high-entropy alloy. The results show that adding Si and N elements increases the recrystallization temperature and delays the recrystallization process. The formation of uniformly distributed Cr2N particles during annealing significantly improves the tensile mechanical properties of the alloy by inhibiting the movements of both dislocations and grain boundaries.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Chaoqiang Liu, Xin Hu, Lin Qi, Houwen Chen, Zhiqiao Li, Xiaoyong Zhang, Hongge Yan, Kechao Zhou, Min Song, Yunzhi Wang, Jian-Feng Nie
Summary: Heterogeneous precipitation of the β phase at boundaries within α' martensite and dislocations greatly affects the mechanical properties of α+β titanium alloys. A novel phenomenon was observed in a Ti-4wt%Mo alloy where the β phase selectively precipitates on Mo-segregated twin boundaries within α' martensite. The unique orientation relationship between the β phase and α' is formed due to the similar structure of the twin boundary and Mo segregation, providing a template for β precipitation and potential improvement in mechanical properties.
Article
Materials Science, Multidisciplinary
Bingqiang Wei, Wenqian Wu, Mingyu Gong, Shuwei Yu, Song Ni, Min Song, Jian Wang
Summary: Deformation twinning is crucial in determining the mechanical behavior of hexagonal metals. Lowering the energy of basal stacking faults can promote the formation of basal stacking faults and face centred cubic phase, which affects the propagation and growth of deformation twins. This study provides insights into the influence of lowering basal stacking faults energy on twinning behaviors in hexagonal metals.
Article
Materials Science, Multidisciplinary
Haijie Zhang, Xiaoshan Liu, Dexin Ma, Min Song, Andreas Ludwig, Abdellah Kharicha, Menghuai Wu
Summary: Single-crystal superalloy turbine blades fabricated using directional solidification are prone to flow-induced defects such as freckles and eutectic accumulation. This study proposes a novel method to digitally simulate the solidification process and verifies its effectiveness through experiments and simulations. It also highlights the importance of the internal structure and other process conditions in freckle formation.
Article
Nanoscience & Nanotechnology
Li Wang, Xiaopeng Liang, Bin Liu, Michael Oehring, Jonathan Paul, Jie Liu, Min Song, Florian Pyczak, Yong Liu
Summary: The interaction between dislocations and perovskite Ti3AlC precipitates in a titanium alloy was investigated. It was found that the Ti3AlC carbides can be sheared by dislocations, leading to the formation of stacking faults and crossed stacking fault configurations. These stacking faults are induced by the shear of Shockley partial dislocations and further extended along specific crystal planes.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Feng Wang, Yue Li, Xinren Chen, Huan Zhao, Khurram Yaqoob, Yong Du, Zhangwei Wang, Min Song
Summary: The formation of dislocation gradient through pre-torsion significantly increases the strength of Al alloys without reducing uniform elongation, leading to exceptional mechanical properties.
MATERIALS RESEARCH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Junyang He, Rui Wang, Na Li, Zhongrun Xiao, Ji Gu, Hongyao Yu, Zhongnan Bi, Weihong Liu, Min Song
Summary: Through multi-scale characterizations from electron channeling contrast imaging to atom probe tomography, we have directly demonstrated that the massive cracking events in selective-laser-melted Haynes 230 superalloy are caused by the continuous decoration of an M(23)C(6-)type thin film at grain boundaries. Despite being strongly depleted from the carbide, impurities Si, Mn, and Fe greatly enhance the susceptibility to cracking.
MATERIALS RESEARCH LETTERS
(2023)
Article
Chemistry, Physical
Weijing Liu, Xinglong An, Wenting Jiang, Song Ni, Min Song
Summary: In this study, the effects of strain rate and strain on the microstructure and hardness of polycrystalline cobalt were investigated. It was found that high strain rate promoted the activation of various types of twinning and incomplete dynamic recrystallization during high-speed impact. Quasi-static compression mainly resulted in dislocation slip and the activation of specific twins. The high-speed compressed samples exhibited higher hardness values due to the higher density of twins produced during high-speed compression.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Longjun Li, Li Wang, Zhida Liang, Junyang He, Min Song
Summary: The formation of various types of oxide scales on the surface and along the grain boundaries of a complex CoNi-based superalloy was investigated at 900 degrees C. A complex multilayered oxide scale was formed under steady-state conditions (oxidation time up to 24 hours). After the breakdown of the steady-state oxide scale (oxidation for 48 hours), different types of oxide scales occurred. It was also observed that oxidation gradually extended into the specimen interior along the grain boundaries, caused by selective oxidation of elements due to differences in equilibrium oxygen partial pressures. Local microstructure and oxygen concentration were found to significantly influence the formation and configuration of the oxide scales in the investigated alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Letter
Materials Science, Multidisciplinary
Hao Zhang, Bingqiang Wei, Xiaoqin Ou, Song Ni, Xiaozhou Liao, Min Song
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yang Yang, Xiaoqin Ou, Hao Zhang, Min Song
Summary: Carbon plays a crucial role in enhancing the mechanical properties of steels as a principal alloying element. This study investigates the interstitial sites for carbon atoms during deformation-induced phase transformations in Fe-C alloys through molecular dynamics simulations, providing insights into the microstructural evolution at the atomic scale. The distribution and arrangement of carbon atoms in the Fe lattice affect the formation of stacking faults and the pinning effects on dislocation movement.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Yangbo Yu, Hongge Yan, Huaming Zhu, Jihua Chen, Weijun Xia, Youping Sun, Bin Su, Yifu Deng, Min Song
Summary: This study investigates the DRX behavior, grain structure, and texture evolution of bimodal TC17 alloy during high strain rate hot compression at 840°C and 900°C. The results show that the lamellar alpha s has almost no impact on the DRX of the beta phase due to dynamic transformation. The formation of dense LAGB cells in the beta phase is influenced by the decomposition of alpha p and the strain level.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Wenting Jiang, Xinglong An, Song Ni, Li Wang, Junyang He, Zibin Chen, Yi Huang, Min Song
Summary: By regulating the substructures, the classical Co25Cr5Mo5W alloy was successfully endowed with an excellent combination of strength and ductility. The study establishes a clear connection between the substructures and the mechanical properties, offering valuable implications for surpassing the current mechanical limitation in the Co-Cr-Mo alloy family.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Changchang Liu, Ji Gu, Min Song
Summary: This study investigates the hot rolling treatment and water quenching process on a TC18 titanium alloy, revealing the formation of a new phase induced by stress and assisted by another phase. The existence of a new phase and diffuse streaks during hot working were also observed. The research confirms the presence of dynamic recrystallization (DRX), with recrystallization grains nucleating preferentially at high-energy areas such as grain boundaries and shear bands. The elongation decreases and tensile strength increases with increasing deformation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yangbo Yu, Hongge Yan, Huaming Zhu, Jihua Chen, Weijun Xia, Chang Xu, Min Song
Summary: Modified alpha precipitation based on severely deformed beta phase and optimized aging treatments is crucial for strengthening titanium alloys. This study investigated the beta phase features of high strain rate hot compressed TC17 alloy and the precipitation behavior of alpha phase during single-step and duplex aging. The results showed that high strain rate hot compression significantly promoted the nucleation and growth of alpha phase, and duplex aging was more beneficial for refining alpha precipitates.
MATERIALS TODAY COMMUNICATIONS
(2023)
