Article
Metallurgy & Metallurgical Engineering
Xudong Du, Feng Wang, Zhi Wang, Le Zhou, Zheng Liu, Pingli Mao
Summary: This study investigated the effects of the addition of minor amounts of antimony (0.5 wt.%) or gadolinium (0.5 wt.%) and the combined addition of both (0.5 wt.% each) on the hot tearing susceptibility of Mg-5Al-3Ca alloy. Various solidification parameters were measured and analyzed, and the microstructure and crystal phases of the alloys were characterized. The results showed that the addition of 0.5 wt.% gadolinium increased the vulnerable temperature range and reduced the eutectic structure content, improving the alloy's hot tearing susceptibility. On the other hand, the addition of 0.5 wt.% antimony or the combined addition of gadolinium and antimony reduced the vulnerable temperature range and improved the alloy's skeleton strength, thereby reducing hot tearing susceptibility. Additionally, the significantly refined structure of Mg-5Al-3Ca-0.5Gd-0.5Sb alloy improved the feeding ability of the eutectic structure, resulting in the lowest hot tearing susceptibility.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
Yongtao Xu, Zhifeng Zhang, Zhihua Gao, Yuelong Bai, Purui Zhao, Weimin Mao
Summary: The addition of refiner Sc to the high Zn/Mg ratio 7xxx series aluminum alloy melt significantly reduces hot cracking sensitivity, decreases grain size, and improves mechanical properties such as tensile strength and elongation rate.
Article
Materials Science, Multidisciplinary
Yi Yao, Chuming Liu, Yonghao Gao, Shunong Jiang
Summary: This study elucidated the microstructural and textural heterogeneities of a large-size Mg alloy ring fabricated by hot ring rolling, and revealed the deformation mechanisms during the process. The research sheds light on the manufacturing of large-size Mg alloy structural components and provides a clue for improving their microstructural and mechanical homogeneity.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Xudong Du, Feng Wang, Zhi Wang, Le Zhou, Ziqi Wei, Zheng Liu, Pingli Mao
Summary: The hot tearing susceptibility of Mg-xAl-yCa alloys with different Ca/Al ratios was experimentally investigated. The results showed that the hot tearing susceptibility decreases with the increase in the Ca/Al ratio. The microstructure and thermal analysis curves of the alloys indicated that a higher Ca/Al ratio enhances intergranular bonding ability and improves the filling efficiency of the liquid phase against tears.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Weizhen Wang, Mengmeng Zhang, Zhuoqun Yang, Weiwei Hu
Summary: The dynamic precipitation and microstructural evolution during hot deformation in a Mg-Zn-Gd alloy were investigated through systematic microstructural characterizations. The results showed that the precipitation behavior of different phases in the alloy can be influenced by specific temperature and annealing time, which play an important role in strengthening the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Jiangfeng Song, Hua Zhao, Jinge Liao, Bin Jiang, Ang Zhang, Yuanding Huang, Karl Ulrich Kainer, Norbert Hort, Fusheng Pan
Summary: This study investigated the hot tearing mechanism of Mg-1Al, Mg-0.9Y, Mg-2Gd, Mg-1.5Zn, and Mg-0.5Ca binary alloys by conducting hot tearing tests and utilizing 3D X-ray tomography technology. The results revealed the susceptibility of these alloys to hot tearing and the factors contributing to it, such as temperature range and residual liquid fraction. The discussion also considered factors like fluidity, thermal expansion coefficient, and mechanical property to provide a comprehensive understanding of the hot tearing mechanism.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Jiaxiang Li, Qinghuan Huo, Chunyu Wang, Yuxiu Zhang, Zhirou Zhang, Gang Feng, Xuyue Yang
Summary: The results of the study demonstrated a clear tension-compression asymmetry in the creep behavior of the alloy under tensile and compressive creep loading along the rolling direction and the normal direction. Twinning played a role in deteriorating the creep resistance of certain samples and causing asymmetrical behavior in the results. The T-RD sample showed the best creep resistance, while the C-ND sample followed, with the C-RD and T-ND samples showing similarly poor creep resistance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Xueyi Wang, Miao Huang, Yu Zheng, Jun Yang, Peizhou Chi, Morteza Tayebi
Summary: The effect of SN500 and SN500 +G lubricants on the wear behavior of Mg-Zn-Gd alloy was studied. The results showed that the presence of precipitates reduced weight loss and wear rate. The lubrication of SN500 +G showed better properties and reduced the coefficient of friction compared to SN500.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Qian Zhang, Quanan Li, Xiaoya Chen, Jiaxin Zhao, Jian Bao, Ziyi Chen
Summary: In this study, the microstructure evolution and dynamic recrystallization mechanism of Mg-Gd-Y-Zr alloy under different deformation conditions were analyzed in detail. It was found that dynamic precipitation occurs prior to dynamic recrystallization, and large-size hard phase particles can induce dynamic recrystallization under high strain conditions, promoting grain refinement.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Mechanical
Yankang Zhu, Kangkang Zhou, Gangqiang Xu, Cangsu Xu, Xiaolu Li, Yuntang Li, Bingqing Wang, Francis Oppong
Summary: This paper studied the hot tearing susceptibility of the camshaft in the casting process by analyzing the alloy composition and mold preheating temperature. The formation mechanism of the hot tear source was also analyzed. The results showed that the hot tearing susceptibility of the camshaft first decreases and then increases as the carbon equivalent and Mn/S ratio increase. It was found that the initiation and propagation of the crack source are caused by the excessively serious non-equilibrium solidification of the camshaft metal fluid.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Materials Science, Multidisciplinary
Chunxiang Chen, Qinghuan Huo, Zhirou Zhang, Yuxiu Zhang, Jiao Tang, Kaiyu Li, Jijun Ma, Xuyue Yang
Summary: In heat-resistant Mg-Gd based alloys, the presence of static precipitated beta ' phases and directly formed PFZs were found to enhance the creep resistance of the alloy. The dominant creep mechanisms, including twinning and cross-slip, were also identified as key factors contributing to the improved creep resistance of the alloy. The study highlights the importance of precipitate origin and PFZ development in understanding and improving the creep properties of Mg-Gd based alloys at medium to high temperatures.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Jun Cai, Lin Chen, Peng Han, Juan Yang, Qingxiang Yang, Qingyang Li, Ben Ding, Ke Qiao, Jiang Li, Qian Zhao, Wen Wang, Kuaishe Wang
Summary: The hot deformation behavior of Mg-9.16Gd-3.03Y-1.44Zn-0.61Zr alloy was investigated through hot compression experiments, optical microscopy, electron back-scatter diffraction, and transmission electron microscopy. The results revealed that the alloy exhibited dynamic recrystallization under high temperature and strain rate conditions, and the volume fraction of dynamic recrystallization grains was influenced by temperature and strain rate.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Sabina Lesz, Bartlomiej Hrapkowicz, Malgorzata Karolus, Klaudiusz Golombek
Summary: Magnesium-based materials show great potential for medical implants, but proper alloying elements and methods are crucial for enhancement. Mechanical alloying is an effective method for designing alloys with desired structures and properties. The hardness of the materials is found to be correlated with the milling time and particle size during the mechanical alloying process.
Article
Metallurgy & Metallurgical Engineering
Liu-wei Zheng, Yong-peng Zhuang, Jun-jian LI, Hong-xia Wang, Hang LI, Hua Hou, Li-fei Wang, Xiao-ping Luo, Kwang Seon Shin
Summary: The effect of Nd addition on the microstructure and mechanical properties of as-extruded Mg-9Gd-0.5Zr alloy is investigated. Nd addition results in the disappearance of elongated non-dynamic recrystallized grains and the formation of uniformly distributed dynamic recrystallized grains. In addition, the precipitation of nano-Mg5(Gd,Nd) particles enhances the strength and ductility of the alloy.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Materials Science, Multidisciplinary
Ziyi Chen, Qian Zhang, Quanan Li, Hongxi Zhu, Xiaoya Chen, Xiangyu Li, Peijun Chen, Jian Bao
Summary: The addition of Sm delays the dynamic recrystallization of Mg-Gd-Nd-Zr alloy, resulting in increased stress and decreased machinability. Two kinds of dynamic precipitates with different sizes and shapes appear in Mg-Gd-Nd-Sm-Zr alloy, with the coarse lamellar phase effectively hindering dislocation rearrangement.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Metallurgy & Metallurgical Engineering
Lixiang Yang, Yuanding Huang, Zhengquan Hou, Lv Xiao, Yuling Xu, Xiwang Dong, Fei Li, Gerrit Kurz, Baode Sun, Zhongquan Li, Norbert Hort
Summary: A Mg-3Y-2Gd-1Nd-0.4Zr alloy with low rare earth content was developed and prepared by sand casting with a differential pressure casting system. The aged alloy exhibited excellent comprehensive mechanical properties due to the formation of fine dense plate-shaped beta' precipitates during aging. This new developed alloy showed better properties compared to commercial WE43 alloy for fabricating large complex thin-walled components.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Metallurgy & Metallurgical Engineering
Yuling Xu, Yuanding Huang, Yuye Wang, Weiming Gan, Shiwei Wang, Emad Maawad, Norbert Schell, Norbert Hort
Summary: In this study, the texture evolution of two Mg materials during tension is investigated. It is found that pure Mg and Mg-15Gd alloy exhibit different deformation modes, with pure Mg showing a dominant prismatic slip and Mg-15Gd alloy showing a complex behavior of twinning and multiple slips. The critical resolved shear stress ratios between non-basal slip and basal slip are lower for Mg-15Gd alloy compared to pure Mg.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Metallurgy & Metallurgical Engineering
Shaozhu Wang, Yuanding Huang, Lixiang Yang, Ying Zeng, Yaozeng Hu, Xiao Zhang, Qiang Sun, Shaojun Shi, Guangyao Meng, Norbert Hort
Summary: The effects of adding different amounts of AlN nanoparticles on the microstructural evolution and strengthening mechanisms of Mg-3Sn-1Ca based alloys were investigated. It was observed that increasing the amount of AlN nanoparticles led to a significant decrease in grain size. The presence of AlN nanoparticles refined the primary crystal phases and provided more nucleation sites for the formation of magnesium. Additionally, the nanoparticles restricted grain growth during solidification. The addition of AlN nanoparticles resulted in improved tensile properties and hardness at both room temperature and high temperature.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Jiangfeng Song, Hua Zhao, Jinge Liao, Bin Jiang, Ang Zhang, Yuanding Huang, Karl Ulrich Kainer, Norbert Hort, Fusheng Pan
Summary: This study investigated the hot tearing mechanism of Mg-1Al, Mg-0.9Y, Mg-2Gd, Mg-1.5Zn, and Mg-0.5Ca binary alloys by conducting hot tearing tests and utilizing 3D X-ray tomography technology. The results revealed the susceptibility of these alloys to hot tearing and the factors contributing to it, such as temperature range and residual liquid fraction. The discussion also considered factors like fluidity, thermal expansion coefficient, and mechanical property to provide a comprehensive understanding of the hot tearing mechanism.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Yiyi Lu, Yuanding Huang, Julia Bode, Carla Vogt, Regine Willumeit-Romer, Karl Ulrich Kainer, Norbert Hort
Summary: The influences of Gd additions and T4 treatment on the mechanical properties and corrosion of Mg-Gd alloys were investigated. Gd solid solution and intermetallic particles were found to improve the hardness and strength of the alloy, while increasing Gd additions led to higher corrosion rates. T4 heat treatment effectively reduced degradation rates and susceptibility to pitting. Mg-2Gd alloy showed a favorable combination of mechanical properties and low homogeneous degradation rate, making it a potential candidate for implants.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Zijian Yu, Yuanding Huang, Linlin Liu, Kang Shi, Baotian Du, Ke Liu, Shubo Li, Wenbo Du
Summary: A new strategy of using Li addition to solve the strength-ductility trade-off in Mg-Gd alloys is reported. Li addition promotes the precipitation of different phases and enhances the activity of dislocations, resulting in simultaneous improvement in yield strength and ductility. Moreover, Li addition reduces the density, increasing the specific yield strength.
SCRIPTA MATERIALIA
(2022)
Article
Crystallography
Maria Nienaber, Gerrit Kurz, Dietmar Letzig, Karl Ulrich Kainer, Jan Bohlen
Summary: The application of magnesium flat products is affected by the limited formability at room temperature and the anisotropy of the mechanical properties, which is mainly caused by the underlying hexagonal crystal structure of magnesium and the development of strong crystallographic textures during massive forming processes. This study focuses on the influence of the manufacturing process on the microstructure and texture evolution of flat products made of conventional magnesium alloy AZ31, and discusses the effects on mechanical properties and formability.
Article
Materials Science, Multidisciplinary
Xiaoying Qian, Hong Yang, Chunfeng Hu, Ying Zeng, Yuanding Huang, Xin Shang, Yangjie Wan, Bin Jiang, Qingguo Feng
Summary: The study successfully improved the homogenized dispersion of nanoscale Al2O3 whiskers in Mg matrix composites by utilizing the potential difference between positive and negative ions. The addition of suitable amounts of SDBS and CTAB promoted more uniformly mixed composite powders, with the modified composite powders showing stronger cohesion.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Chemistry, Physical
Hongcan Chen, Tianci Xie, Quan Liu, Yuanding Huang, Bin Liu, Qun Luo, Qian Li
Summary: This study further improved the mechanical properties and thermal conductivity of Mg-Zn-La/Ce alloys through aging treatment, achieving good comprehensive performance. The addition of La/Ce forms a ternary tau 1 phase that reduces the supersaturation of the Mg matrix and has a positive effect on thermal conductivity. Precipitation has two opposite effects on thermal conductivity, reducing supersaturation but hindering the free movement of electrons and phonons.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Lingling Fan, Mingyang Zhou, Yuwenxi Zhang, Hajo Dieringa, Xiaoying Qian, Ying Zeng, Xianwen Lu, Yuanding Huang, Gaofeng Quan
Summary: Heterogeneous TiC/AZ61 nanocomposites were fabricated to enhance both the strength and ductility of Mg matrix composites. The proportion of TiC-rich fine grain (FG) zones and TiC-rare coarse grain (CG) bands could be adjusted by changing the mechanical ball milling time. The composites achieved excellent mechanical properties with a volume fraction of 25% CG bands after 20 h of ball milling, which was attributed to the presence of geometrically necessary dislocations (GNDs) in the CG bands.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Review
Metallurgy & Metallurgical Engineering
Hui Shi, Yuanding Huang, Qun Luo, Sarkis Gavras, Regine Willumeit-Roemer, Norbert Hort
Summary: This article provides a brief overview of the diffusion behavior of Mg alloys and discusses the methods for detecting and extracting diffusion coefficients. It reviews the diffusion data of Mg alloys and highlights their significance in designing and applying these alloys.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Luisa-Marie Heine, Andreas Heider, Roland Gauch, Mathias Schlett, Marc Hummel, Christoph Spurk, Felix Beckmann, Julian Moosmann
Summary: Laser beam welding is an important joining process for copper components in the electrical powertrain. However, welding copper with laser beams is challenging due to its high heat conductivity and low absorptivity. Recent research has shown that using blue lasers with a wavelength of 450 nm can improve the welding process and reduce weld defects. Additionally, investigations using a blue diode laser have provided insights into the material behavior during welding, particularly in relation to melt pool dynamics and capillary dynamics.
JOURNAL OF LASER APPLICATIONS
(2023)
Article
Metallurgy & Metallurgical Engineering
Hui Shi, Yuanding Huang, Lixiang Yang, Chunquan Liu, Hajo Dieringa, Chong Lu, Lv Xiao, Regine Willumeit-Roemer, Norbert Hort
Summary: This study investigates the creep behavior and microstructural evolution of sand-cast Mg-14Gd-0.4Zr alloy using compressive creep tests. The results show that the coherent distribution of beta' and beta' (F) phases effectively impedes dislocation movement and enhances creep resistance. However, with increasing creep time, the fine precipitate chains coarsen and transform into different phases, leading to stress concentration and increased creep strain.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Proceedings Paper
Optics
Mirko Riedel, Joerg U. Hammel, Julian P. Moosmann, Felix Beckmann, Florian L. Schwarzenberg, Paul Schuetz, Stephan Henne, Clemens Wulfing, Madleen Busse, Julia Herzen
Summary: Previously, we designed a new quantitative phase-contrast setup based on Talbot array illuminators, which can achieve a spatial resolution level comparable to propagation-based imaging. In this work, we focus on the progress of bringing this setup into user operation and collaborate with INI-Research to investigate the vascular system of mouse lymph nodes, demonstrating the stability and performance of the setup.
DEVELOPMENTS IN X-RAY TOMOGRAPHY XIV
(2022)