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| 1 | Recent research and developments on wrought magnesium alloys显示文摘Wrought magnesium alloys attract special interests as lightweight structural material due to their homogeneous microstructure and enhanced mechanical properties compared to as-cast alloys.In this contribution,recent research and developments on wrought magnesium alloys are reviewed from the viewpoint of the alloy design,focusing on Mg-Al,Mg-Zn and Mg-rare earth(RE)systems.The effects of different alloying elements on the microstructure and mechanical properties are described considering their strengthening mechanisms,e.g.grain refinement,precipitation and texture hardening effect.Finally,the new alloy design and also the future research of wrought magnesium alloys to improve their mechanical properties are discussed. | Sihang You Yuanding Huang Karl Ulrich Kainer Norbert Hort | 2017 | Journal of Magnesium and Alloys2017，5，3： | 43 |
| 2 | Role of multi-microalloying by rare earth elements in ductilization of magnesium alloys显示文摘The present work investigates the influences of microalloying with rare earths on the mechanical properties of magnesium alloys.The amount of each rare earth element is controlled below 0.4 wt.%in order not to increase the cost of alloy largely.The synergic effects from the multi-microalloying with rare earths on the mechanical properties are explored.The obtained results show that the as-cast magnesium alloys multi-microalloying with rare earths possesses a quite high ductility with a tensile strain up to 25-30%at room temperature.Moreover,these alloys exhibit much better corrosion resistance than AZ31 alloy.The preliminary in situ neutron diffractions on the deformation of these alloys indicate that the multi-microalloying with rare earths seems to be beneficial for the activation of more slip systems.The deformation becomes more homogeneous and the resultant textures after deformation are weakened. | Yuanding Huang Weimin Gan Karl Ulrich Kainer Norbert Hort | 2014 | Journal of Magnesium and Alloys2014，2，1： | 19 |
| 3 | Effects of Gd solutes on hardness and yield strength of Mg alloys显示文摘Relative contribution of individual strengthening mechanisms to the yield strength of Mg–0–15 wt%Gd alloys were investigated.Alloys with different grain size were prepared by adding Zr and hot extrusion.Hardness and tensile/compression yield strength were tested on the alloys after solid solution treatment and extrusion.HallPetch constants were calculated with hardness and tensile/compressive data.The results showed that the hardness of Mg–Gd alloys with similar Gd content and different grain size were almost the same,which indicates that grain size had little effect on hardness.The hardness linearly increased with rising Gd content(d H_v/dc≈25 kg mm^(-2)/at%Gd).The tensile and compressive yield strengths enhanced with the increase of Gd content for all alloys in different conditions.In addition,the tensile/compressive(t/c)yield asymmetry of extruded alloys decreased with increasing Gd content.Large t/c yield asymmetry ratio(1.77)was observed for pure Mg,and with increasing Gd content this value decreased to 1.With the increasing of tensile strength,the stress intensity factor,k_y,decreased from 0.27 MPa m^(1/2)for Mg–2 wt%Gd alloy to 0.19 MPa m^(1/2) for Mg–5 wt%Gd alloy,then increased to 0.29 MPa m^(1/2) for Mg–15 wt%Gd alloy.However,k_yincreased linearly form 0.16–0.31 MPa for compression test.The influence of grain size strengthening was eliminated,and the yield strength of tension and compression both linearly increased with c^n,where c is the atom concentration of Gd,and n=1/2 or 2/3. | Yuling Xu Felix Gensch Zhen Ren Karl Ulrich Kainer Norbert Hort | 2018 | Progress in Natural Science:Materials International2018，28，6： | 8 |
| 4 | 添加铈对高压压铸AM50镁合金显微组织和力学性能的影响(英文)显示文摘研究添加铈对高压压铸AM50镁合金显微组织和力学性能的影响。结果表明:添加铈能使AM50镁合金晶粒细化,并使其室温和高温力学性能得到显著改善。相对于未添加Ce和添加0.5%Ce(质量分数)的AM50镁合金,添加1%Ce(质量分数)的镁合金的晶粒更细,力学性能更优。 | Faruk MERT Ahmet ZDEMIR Karl Ulrich KAINER Norbert HORT | 2013 | Transactions of Nonferrous Metals Society of China2013，23，1： | 7 |
| 5 | Dynamic tensile properties and microstructural evolution of extruded EW75 magnesium alloy at high strain rates显示文摘The dynamic tensile properties and microstructural evolution of an extruded EW75 magnesium alloy deformed at ambient temperature and different high strain rates(from 1000 to 3000 s^(-1))along extrusion direction(ED)were investigated by Split Hopkinson Tension Bar(SHTB).The corresponding deformation mechanisms,texture evolution and microstructure changes were analyzed by optical microscope(OM),electron backscatter diffraction(EBSD)and transmission electron microscope(TEM).The results show that the extruded EW75 magnesium alloy along ED exhibits a conventional positive strain rate sensitivity that the dynamic flow stresses increase with in creasing strain rate.Texture measurements show that after dynamic tension,the initial weak texture of extruded EW75 magnesium alloy tansforms to a relatively strong<10-10>//ED texture with increasing strain rates.The microstructural analysis demonstrates that dislocation motion are main deformatin mode to accommodate dynamic tensile deformation at high strain rates.In addition,the interactions of dislocation-dislocation and dislocation-second phase lead to the in crease of flow stress and strain hardening with increasing strain rate. | Jincheng Yu Bo Song Dabiao Xia Xun Zeng Yuanding Huang Norbert Hort Pingli Mao Zheng Liu | 2020 | Journal of Magnesium and Alloys2020，8，3： | 7 |
| 6 | Effects of samarium content on microstructure and mechanical properties of Mg–0.5Zn–0.5Zr alloy显示文摘Effects of samarium (Sm) content (0, 2.0, 3.5, 5.0, 6.5 wt%) on microstructure and mechanical proper-ties of Mg-0.5Zn-0.5 Zr alloy under as-cast and as-extruded states were thoroughly investigated. Results indicate that grains of the as-cast alloys are gradually refined as Sm content increases. The dominant intermetallic ph^se changes from Mg3Sm to Mg4iSm5 till Sm content exceeds 5.0 wt%. The dynami-cally precipitated intermetallic phase during hot-extrusion in dll Sm-containing alloys is Mg3Sm. The intermetallic particles induced by Sm addition could act as heterogeneous nucleation sites for dynamic recrystallization during hot extrusion. They promoted dynamic recrystallization via the particle stim-ulated nucleation mechanism, and resulted in weakening the basal texture in the as-extruded alloys. Sm addition can significantly enhance the strength of the as-extruded Mg-0.5Zn-0.5Zr alloy at room temperature, with the optimal dosage of 3.5 wt%. The optimal yield strength (YS) and ultimate tensile strength (UTS) are 368 MPa and 383 MPa, which were enhanced by approximately 23.1% and 20.8% com-pared with the Sm-free alloy, respectively. Based on microstructural analysis, the dominant strengthening mechanisms are revealed to be grain boundary strengthening and dispersion strengthening. | Kai Guan Fanzhi Meng Pengfei Qin Qiang Yang Dongdong Zhang Baishun Li Wei Sun Shuhui Lv Yuanding Huang Norbert Hort Jian Meng | 2019 | Journal of Materials Science & Technology2019，35，7： | 4 |
| 7 | Microstructure and mechanical properties of large-scale Mg-Gd-Y-Zn-Mn alloys prepared through semi-continuous casting显示文摘Large-scale Mg-8Gd-4Y-1Zn-Mn(wt.%)alloy ingot with a diameter of 315 mm and a length of 2410 mm was prepared through semi-continuous casting.Chemical composition,microstructure and mechanical properties at different locations of the samples with as-cast,T4 and T6 heat-treated states,respectively,were investigated.No obvious macro segregation has been detected in the high-quality alloy ingot.The main eutectic structures at all different locations are composed ofα-Mg,Mg3RE-type,Mg5RE-type and LPSO phases.At the edge of ingot,the unusual casting twins including 10-12 extension twins and 10-11 compression twins were observed due to the intensive internal stress.In T4 heat-treated alloy,the micro segregation was eliminated.The remained phases wereα-Mg and LPSO phase.Combined with the remarkable age-hardening response,T6 samples exhibits improved mechanical properties at ambient temperature,which derives from the dense prismaticβ'precipitates and profuse basalγ'precipitates. | Kui Wang Jingfeng Wang Xiaoxu Dou Yuanding Huang Norbert Hort Sarkis Gavras Shijie Liu Yanwu Cai Jinxing Wang Fusheng Pan | 2020 | Journal of Materials Science & Technology2020，52，17： | 4 |
| 8 | Degradable biomaterials based on magnesium corrosion显示文摘 | Frank Witte Norbert Hort Carla Vogt Smadar Cohen Karl Ulrich Kainer Regine Willumeit Frank Feyerabend | 2009 | Current Opinion in Solid State & Materials Science2009，，5： | 3 |
| 9 | Unexpected formation of hydrides in heavy rare earth containing magnesium alloys显示文摘Mg–RE(Dy,Gd,Y)alloys show promising for being developed as biodegradable medical applications.It is found that the hydride REH_(2) could be formed on the surface of samples during their preparations with water cleaning.The amount of formed hydrides in Mg–RE alloys is affected by the content of RE and heat treatments.It increases with the increment of RE content.On the surface of the alloy with T4 treatment the amount of formed hydride REH_(2) is higher.In contrast,the amount of REH2 is lower on the surfaces of as-cast and T6-treated alloys.Their formation mechanism is attributed to the surface reaction of Mg–RE alloys with water.The part of RE in solid solution in Mg matrix plays an important role in influencing the formation of hydrides. | Yuanding Huang Lei Yang Sihang You Weimin Gan Karl Ulrich Kainer Norbert Hort | 2016 | Journal of Magnesium and Alloys2016，4，3： | 3 |
| 10 | Understanding effects of microstructural inhomogeneity on creep response-New approaches to improve the creep resistance in magnesium alloys显示文摘Previous investigations indicate that the creep resistance of magnesium alloys is proportional to the stability of precipitated intermetallic phases at grain boundaries.These stable intermetallic phases were considered to be effective to suppress the deformation by grain boundary sliding,leading to the improvement of creep properties.Based on this point,adding the alloying elements to form the stable intermetallics with high melting point became a popular way to develop the new creep resistant magnesium alloys.The present investigation,however,shows that the creep properties of binary Mg-Sn alloy are still poor even though the addition of Sn possibly results in the precipitation of thermal stable Mg_(2)Sn at grain boundaries.That means other possible mechanisms function to affect the creep response.It is finally found that the poor creep resistance is attributed to the segregation of Sn at dendritic and grain boundaries.Based on this observation,new approaches to improve the creep resistance are suggested for magnesium alloys because most currently magnesium alloys have the commonality with the Mg-Sn alloys. | Yuanding Huang Hajo Dieringa Karl Ulrich Kainer Norbert Hort | 2014 | Journal of Magnesium and Alloys2014，2，2： | 3 |
| 11 | In vivo urinary compatibility of Mg-Sr-Ag alloy in swine model显示文摘A biodegradable metallic ureteral stent with suitable mechanical properties and antibacterial activity remains a challenge.Here we reveal the scientific significance of a biodegradable Mg-Sr-Ag alloy with a favorable combination of balanced mechanical properties,adjustable indwelling time in urinary tract and evident antibacterial activity via in vivo experiments in a swine model.Attributed to the rheo-solidification process,equiaxial microstructure and significantly refined grains(average grain size:27.1μm)were achieved.Mg17Sr2 and Mg4Ag were found as the primary precipitates in the matrix,due to which the alloy obtained ca.111%increase in ultimate tensile strength in comparison to pure magnesium.Both the in vitro and in vivo results demonstrated the satisfactory biocompatibility of the alloy.Histological evaluation and bioindicators analysis suggested that there was no tissue damage,inflammation and lesions in the urinary system caused by the degradation process.The stent also improved the post-operative bladder functions viewed from the urodynamic results.Our findings highlight the potential of this alloy as antibacterial biodegradable urinary implant material. | Di Tie Norbert Hort Minfang Chen Renguo Guan Sviatlana Ulasevich Ekaterina V.Skorb Dapeng Zhao Yili Liu Patricia Holt-Torres Huinan Liu | 2022 | Bioactive Materials2022，7，1： | 2 |
| 12 | Degradable biomaterials based on magnesium cor- rosion 显示文摘 | Frank Witte Norbert Hort Carla Vogt Smadar Cohen Karl UMch Kainer Regine Willumeit and Frank Feyer- abend | 2008 | Current Opinion in Solid State and Materials Science2008，12，56： | 1 |
| 13 | Preparation and properties of high purity Mg–Y biomaterials显示文摘 | Qiuming Peng Yuanding Huang Le Zhou Norbert Hort Karl Ulrich Kainer | 2009 | Biomaterials2009，，3： | 1 |
| 14 | Magnesium: An essential nutrient for a good biomaterial 显示文摘 | Michele V Manuel Norbert Hort | 2011 | JOM Journal of the minerals metals andmaterials society2011，63，4： | 1 |
| 15 | Mechanical behaviors of extruded Mg alloys with high Gd and Nd content显示文摘The influence of alloying elements and heat treatment on the microstructure and mechanical behaviors of extruded Mg–Gd–Nd ternary alloys was investigated in this study.The grain sizes dramatically decreased after extrusion,and the particles which distributed in Mg matrix had great effect on the grain size.The grain sizes of extruded alloys decreased from 26 to 5μm with the alloying content increasing.The mechanical test results show that both Gd and Nd had positive effect on the hardness,yield strength and Young’s modulus.The ultimate tensile strength(UTS)was enhanced by Gd content,decreased with Nd content.The elongation of alloys was lower with higher alloying elements.Those extruded alloys were aged for 200 h in 200℃.The Young’s moduli were decreased by ageing treatment.Combined with microstructure study,the part of the reinforcement which identified as Mg5(Gd/Nd)was dissolved in Mg matrix.Nd element obviously has influence on the solubility of Gd in Mg alloys. | Yuling Xu Shiwei Wang Yuye Wang Li Chen Lixiang Yang Lu Xiao Li Yang Norbert Hort | 2021 | Progress in Natural Science:Materials International2021，31，4： | 1 |
| 16 | Microstructural investigations of the Mg-Sn-xCa system显示文摘 | Norbert Hort Huang Yuanding Alu Leil T | 2006 | Advance Engineering Materials2006，，8： | 1 |
| 17 | Tensile and compressive creep behaviour of Al 2 O 3 (Saffil ? ) short fiber reinforced magnesium alloy AE42显示文摘 | Hajo Dieringa Yuanding Huang Petra Maier Norbert Hort Karl Ulrich Kainer | 2005 | Materials Science & Engineering A2005，，： | 1 |
| 18 | Magnesium Based MMCs Reinforced with C-Fibers 显示文摘 | Hajo Dieringa Norbert Hort Karl Ulrich Kainer | 2004 | Advances in Technology of Materials and Materials Processing2004，6，2： | 1 |
| 19 | 添加CaO或Y的ZK40镁合金的腐蚀行为(英文)显示文摘研究了铸造ZK40、添加2%(质量分数)CaO和添加1%(质量分数)Y的ZK40镁合金的微观组织,并表征了金属间化合物相的形貌和分布。利用ZK40晶界处分散的金属间化合物颗粒,将添加了CaO或Y的ZK40的微观组织调整为沿晶界分布的金属间化合物的半连续网络结构。微观组织中没有检测到CaO,Ca存在于铸造过程中形成的金属间化合物Ca_2Mg_6Zn_3中。析氢和电化学交流阻抗谱分析显示,添加CaO后合金的耐腐性略有提高,而添加Y却对ZK40的耐腐蚀性有负面影响。浸泡试验结果显示,严重的局部腐蚀和沿金属间化合物的腐蚀对ZK40-Y合金的腐蚀过程有重要影响,而ZK40和ZK40-CaO合金的局部腐蚀不明显。ZK40合金中α-Mg基体中的显微偏析明显高于加CaO或Y的ZK40合金,这种作用结合合金表面形成了更加稳定的耐腐蚀层是ZK40-CaO合金的耐腐蚀性能提高的主要原因。 | Ricardo Henrique BUZOLIN Marta MOHEDANO Chamini Lakshi MENDIS Beatriz MINGO Domonkos TOLNAI Carsten BLAWERT Karl Ulrich KAINER Haroldo PINTO Norbert HORT | 2018 | Transactions of Nonferrous Metals Society of China2018，28，3： | 1 |
| 20 | Influence of ageing treatment on microstructure, mechanical and bio-corrosion properties of Mg–Dy alloys显示文摘 | Lei Yang Yuanding Huang Frank Feyerabend Regine Willumeit Karl Ulrich Kainer Norbert Hort | 2012 | Journal of the Mechanical Behavior of Biomedical Materials2012，，： | 1 |
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