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| 1 | Effect of Cr on Microstructure and Fracture Toughness of Nb-20Ti-16Si-xCr Alloys显示文摘The present paper reported the phase stability and microstructures evolution of Nb-20Ti-16Si-xCr (x = 0~20at.%) in-situ composites as function of Cr addition. It was suggested that with the addition of Cr less than 7%, the silicide phase in as-cast Nb-20Ti-16Si alloy was Nb3Si. The silicides changed to be α-Nb5Si3 by the addition of Cr above 7%. It was found that annealing of 1300 ℃ for 100 h could result in the decomposition of Nb3Si to NbSS and α-Nb5Si3 in Cr containing Nb-20Ti-16Si based alloys by means of eutectoid reaction. Whereas in the case of alloy without Cr addition, the Nb3Si in Nb-20Ti-16Si alloy keep good stability during the high temperature annealing. The Cr additions larger than 5% in Nb-20Ti-16Si-xCr alloys could result in the formation of Cr-rich Laves phase. In addition, the influence of Cr addition on the room temperature fracture toughness of the alloys after annealing was reported. | Tang Liang Ma Chaoli Zhao Xinqing | 2009 | 稀有金属材料与工程2009，38，A03： | 11 |
| 2 | Phase Transformation in a β-Ti Alloy with Good Balance Between High Strength and High Fracture Toughness显示文摘Ti-1300合金是一种亚稳β钛合金,为了从组织形貌方面解释其高强高韧的特性,对此钛合金的相变特征进行了研究。研究结果表明,由于α相的球化,此钛合金抗拉强度可达1400MPa以上,同时发现特定的板条状α相有利于保持此钛合金较高的断裂韧性(KQ≥81MPa·m1/2),与针状二次α相相比,板条状二次α相应力集中程度较轻,因此有利于获得较高的韧性。对时效过程中α相的形貌变化进行了研究,并从热力学和动力学上进行了描述,同时给出了一种比较合理的热处理制度。 | Li Yang Wei Qiang Ma Chaoli Zheng Lijing Li Huanxi Ge Peng Zhao Yongqing | 2009 | Chinese Journal of Aeronautics2009，22，5： | 7 |
| 3 | Liquid-Solid Phase Equilibria of Nb-Si-Ti Ternary Alloys显示文摘To determine the liquid-solid phase equilibria of the Nb-Si-Ti ternary system,Nb-Si-Ti alloys of different compositions are pre-pared. By means of scanning electron microscopy (SEM),X-ray diffraction (XRD) and electron probe microanalysis (EPMA),the phases in the alloys,such as Si-based solutions,Ti(Nb)Si,Ti(Nb)Si2,Nb(Ti)Si2,Ti(Nb)5Si4,Nb(Ti)5Si3,Ti(Nb)5Si3,Nb(Ti)3Si and Nb-based solutions are identified,and the phase evolution is analyzed. As a result,the microstructural and microchemical evidence pro-vides a clear definition of the Nb-Si-Ti liquidus surface projection and indicates that the ternary phase diagram has seven transition reac-tions. | Bao Jing Huang Qiang Tang Liang Geng Tai Zhao Xinqing Ma Chaoli | 2008 | Chinese Journal of Aeronautics2008，21，3： | 5 |
| 4 | Phase Equilibria in Nb-Si-Mo Ternary Alloys at 1273 K and 2073 K显示文摘Phase equilibrium in Nb-Si-Mo ternary alloys (<37.5 at.% Si) at 1 273 K and 2 073 K is investigated by using X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The partial isothermal section at 1 273 K, which contains four single-phase regions, five two-phase regions and two three-phase regions, is basically the same as that at 1 973 K. However, when the temperature increases to 2 073 K, the three-phase region of Nbss+α-(Nb(Mo))5Si3+β-(Nb,Mo)5Si3 obvi-ously moves towards the Nb-rich corner. This suggests that Nb-Si-Mo ternary alloys remain stable at least up to 1 973 K. | Huang Qiang Ma Chaoli Zhao Xinqing Xu Huibin | 2008 | Chinese Journal of Aeronautics2008，21，5： | 3 |
| 5 | A novel strategy for developingα+βdual-phase titanium alloys with low Young's modulus and high yield strength显示文摘In this study,a novel strategy for developingα+βdual-phase titanium alloys with low Young's modulus and high yield strength was proposed,and a Ti-15Nb-5Zr-4Sn-1 Fe alloy was developed through theoretical composition design and microstructure manipulation.After hot-rolling and subsequent annealing,a high volume fraction of ultrafine grainedαphase embedded in metastableβ-matrix was formed in the microstructure as intended.Consequently,this alloy exhibits both low Young's modulus(61 GPa)and high yield strength(912 MPa).The experimental results prove that the proposed strategy is appropriate for developing titanium alloys with superior yield strength-to-modulus ratio than those of conventional metallic biomedical materials.Present study might shed light on the research and development of advanced biomedical titanium alloys with low Young's modulus and high yield strength. | Yu Fu Wenlong Xiao Junshuai Wang Lei Ren Xinqing Zhao Chaoli Ma | 2021 | Journal of Materials Science & Technology2021，，17： | 2 |
| 6 | Evaluation of glass-forming ability for metallic glasses based on order-disorder competition 显示文摘 | Xia Mingxu Zhang Shuguang Ma chaoli | 2006 | Applied Physics Letters2006，89，9： | 1 |
| 7 | Effects of Yttrium and Eribum additions on glass-forming ability and mechanical properties of bulk glassy Zr-Al-Ni-Cu alloys显示文摘 | LUO Jun DUAN Huiping MA Chaoli | 2006 | Mater Trans2006，47，： | 1 |
| 8 | J Mater Sci显示文摘 | Xi Wenjun Zhou Heping Ma Chaoli | 2007 | 42(20):84892007，42，20： | 1 |
| 9 | Importance-driven time-varying data visualization显示文摘 | Wang Chaoli Yu Hongfeng Ma Kwan-Liu | 2008 | IEEE Transactions on Visualization and Computer Graphics2008，14，6： | 1 |
| 10 | Evaluation of glass-forming ability for metallic glasses based on order-disorder competition 显示文摘 | Xia Mingxu Zhang Shuguang Ma Chaoli | 2006 | Applied Physics Letters2006，89，9： | 1 |
| 11 | Development of Ti-Al-Ta-Nb-(Re)near-αhigh temperature titanium alloy:Microstructure,thermal stability and mechanical properties显示文摘Mechanical properties and microstructural stability under the service temperature are important to the high temperature titanium alloy.In order to evaluate the potential in increase the service temperature of Ti alloy,two near-αTi alloys with high content of Al asα-stabilizer and Ta,Nb and/or Re asβ-stabilizers were designed and prepared by ingot metallurgy and thermomechanical processing,and the microstructure and mechanical properties before and after thermal exposure at 650℃ for 100 h were characterized.The results indicated that due to the weakβ-stabilizing ability of Ta and Nb elements,only a small amount ofβphase was formed in Ti-10Al-4Ta-2Nb alloy.With a trace Re addition,theβphase was obviously increased in Ti-10Al-4Ta-2Nb-0.25Re,indicating that the Re was a strongβ-stabilizer.Under the same thermomechanical conditions,the Re addition decreased the volume fraction of primaryα(α_(p))phase and refined the secondaryα(α_(s))phase evidently.The primaryαphase presented an obvious core-shell structure in the Ti-10Al-4Ta-2Nb alloy,with higher Al concentration in the shell.While the core-shell structure was not obvious in the Re-containing alloy due to the Re decreases the diffusion of Al,Ta and Nb elements.A large number of orderedα_(2)precipitates can be observed in theα_(p)andα_(s) phases of two alloys.Theα_(2)precipitates continuously grew up during thermal exposure,however,their growth rate in theα_(s)phase of Re-containing alloy were lower than that of Ti-10Al-4Ta-2Nb alloy.Although plenty of orderedα_(2)precipitates formed in the Ti-10Al-4Ta-2Nb alloy,the alloy had a certain plasticity at room temperature.The trace Re addition evidently increased the tensile strength but caused the decrease of the plasticity.After thermal exposure,the strength was further increased,while the plasticity was decreased for both of alloys. | Juan Li Yaqun Xu Wenlong Xiao Chaoli Ma Xu Huang | 2022 | Journal of Materials Science & Technology2022，，14： | 1 |
| 12 | Bulk glass formation in ternary Cu-Zr-Ti system显示文摘The formation of bulk metallic glasses (BMGs) in ternary Cu-Zr-Ti system was investigated by a copper mold casting method. The nature of the amorphous phase was verified by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). It was demonstrated that the BMGs could be formed in a broad composition range in this system. Cu50Zr42.5Ti7.5, Cu60Zr27.5Ti12.5, Cu60Zr30Ti10 and Cu60Zr32.5Ti7.5 alloys exhibit strong glass-forming ability (GFA), and fully glassy rods of 5 mm in diameter can be obtained. In the center region of the ternary diagram, however, the GFA of the alloys was degraded due to the presence of Laves phase. The degradation of the GFA results from easy nucleation of the Laves phase in the undercooled liquid. | Hua Men, Junying Fu, Chaoli Ma, Shujie Pang, and Tao Zhang Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China | 2007 | International Journal of Minerals,Metallurgy and Materials2007，15，S1： | 1 |
| 13 | Formation and thermal stability of Cu-Zr-Al-Er bulk metallic glasses with high glass-forming ability显示文摘The formation and thermal stabilities of Cu46.25Zr46.25xAl7.5Erx (x=0 to 8) bulk metallic glasses (BMGs) were investigated. The addition of a small amount of Er (2at%) for replacing Zr effectively improves the glass-forming ability of Cu46.25Zr46.25Al7.5 alloy, and the glassy rod with a diameter of at least 12 mm can be formed. The glass transition temperature (Tg), temperature interval of su- percooled liquid region △Tx (=Tx-Tg), and reduced glass transition temperature Trg (=Tg/Tl) of Cu46.25Zr44.25Al7.5Er2 glassy alloy are 699 K, 62 K and 0.607, respectively. | Junying Fu, Hua Men, Shujie Pang, Chaoli Ma, and Tao Zhang Department of Materials Science and Engineering, Behang University, Beijing 100083, China | 2007 | International Journal of Minerals,Metallurgy and Materials2007，15，S1： | 1 |
| 14 | Mg-Cu-Zn-Y-Zr bulk metallic glassy composite with high strength and plasticity显示文摘Mg65Cu20Zn5Y9Zr1 bulk metallic glass matrix composite with a diameter of 2 mm was produced by copper mold casting. Upon cooling the Mg65Cu20Zn5Y9Zr1 melt, Mg2Cu acicular crystalline phase precipitates uniformly with a size of about 20 μm long and 1 μm thick while the remaining melt undergoes glass transition. Room temperature compression tests revealed that the high fracture strength up to 830 MPa and the plastic strain of 2.4% before failure are obtained for the Mg-based bulk metallic glass matrix composite. The formation of the Mg2Cu phase was proposed to contribute to high strength and plastic deformation of the material. | Wei Tian, Shujie Pang, Hua Men, Chaoli Ma, and Tao Zhang Department of Materials Science and Engineering, Beihang University, Beijing 100083, China | 2007 | International Journal of Minerals,Metallurgy and Materials2007，15，S1： | 1 |
| 15 | Influence of similar atom substitution on glass formation in (La–Ce)–Al–Co bulk metallic glasses显示文摘 | Ran Li Shujie Pang Chaoli Ma Tao Zhang | 2007 | Acta Materialia2007，，11： | 1 |
| 16 | Influence of similar atom substitution on glass formation in (La–Ce)–Al–Co bulk metallic glasses显示文摘 | Ran Li Shujie Pang Chaoli Ma Tao Zhang | 2007 | Acta Materialia2007，，11： | 1 |
| 17 | Formation and Mechanical Properties of Zr-Nb-Cu-Ni-Al-Lu Bulk Glassy Alloys with Superior Glass-Forming Ability显示文摘Glass-forming ability(GFA) and mechanical properties of(Zr_(0.58)Nb_(0.03)Cu_(0.16)Ni_(0.13)Al_(0.10))_(100-x)Lu_x(x= 0-3 at%) alloys have been investigated.The GFA of Zr_(58)Nb_3Cu_(16)Ni_(13)Al_(10) alloy is dramatically enhanced by adding Lu.The(Zr_(0.58)Nb_(0.03)Cu_(0.16)Ni_(0.13)Al_(0.10))_(98)Lu_2 alloy possesses the highest GFA in the studied Zr-Nb-Cu-Ni-Al-Lu alloys,with its critical diameter for glass formation reaching 20 mm by copper-mould casting method,while that of the Lu-free Zr_(58)Nb_3Cu_(16)Ni_(13)Al_(10) alloy is 7 mm.The critical diameters of(Zr_(0.58)Nb_(0.03)Cu_(0.16)Ni_(0.13)Al_(0.10))_(100-x)Lu_x(x =1 at%and 3 at%) alloys are 15 mm and 12 mm,respectively.The Lu addition to Zr_(58)Nb_3Cu_(16)Ni_(13)Al_(10) alloy induces the change of initial crystallization phases from face-centred-cubic Zr_2Ni and tetragonal Zr_2Ni phases for the Lu-free Zr_(58)Nb_3Cu_(16)Ni_(13)Al_(10) alloy to an icosahedral quasi-crystalline phase for the Lu-doped alloys,which may be the origin for the enhanced GFA of the Lu-doped alloys.The compressive fracture strength and plastic strain of the bulk glassy(Zr_(0.58)Nb_(0.03)Cu_(0.16)Ni_(0.13)Al_(0.10))_(98)Lu_2 alloy are1 610 MPa and 1.5%,respectively. | 赵相金 LIU Wei LIU Li ZHANG Tao PANG Shujie MA Chaoli | 2016 | Journal of Wuhan University of Technology(Materials Science)2016，31，1： | 1 |
| 18 | Formation and thermal stability of Cu-Zr-Al-Er bulk metallic glasses with high glass-forming ability 显示文摘 | Fu Junying Men Hua Pang Shujie Ma Chaoli Zhang Tao | 2007 | Journal of University of Science and Technology Beijing Mineral Metallurgy Material2007，14，： | 1 |
| 19 | Kinetics of crystallization process for Pd-based bulk metallic glasses显示文摘 | Li Liu Xiangjin Zhao Chaoli Ma Tao Zhang | 2008 | Intermetallics2008，，4： | 1 |
| 20 | High thermal conductivity and high strength magnesium alloy for high pressure die casting ultrathin-walled components显示文摘With the rapid development of 3C industries,the demand for high-thermal-conductivity magnesium alloys with high mechanical performance is increasing quickly.However,the thermal conductivities of most common Mg foundry alloys(such as Mg-9wt%-1wt%Zn)are still relatively low.In this study,we developed a high-thermal-conductivity Mg-4Al-4Zn-4RE-1Ca(wt%,AZEX4441)alloy with good mechanical properties for ultrathin-walled cellphone components via high-pressure die casting(HPDC).The HPDC AZEX4441 alloy exhibited a fine homogeneous microstructure(average grain size of 2.8μm)with granular Al_(11)RE_(3),fibrous Al_(2)REZn_(2),and networked Ca_(6)Mg_(2)Zn_(3) phases distributed at the grain boundaries.The room-temperature thermal conductivity of the HPDC AZEX4441 alloy was 94.4 W·m^(-1)·K^(-1),which was much higher than 53.7 W·m^(-1)·K^(-1) of the HPDC AZ91D alloy.Al and Zn in the AZEX4441 alloy were largely consumed by the formation of Al_(11)RE_(3),Al_(2)REZn_(2),and Ca_(2)Mg_(6)Zn_(3) phases because of the addition of RE and Ca.Therefore,the lattice distortion induced by solute atoms of the AZEX4441 alloy(0.171%)was much lower than that of the AZ91D alloy(0.441%),which was responsible for the high thermal conductivity of the AZEX4441 alloy.The AZEX4441 alloy exhibited a high yield strength of~185 MPa,an ultimate tensile strength of~233 MPa,and an elongation of~4.2%.This result indicated that the tensile properties were comparable with those of the AZ91D alloy.Therefore,this study contributed to the development of high-performance Mg alloys with a combination of high thermal conductivity,high strength,and good castability. | Jian Rong Wenlong Xiao Xinqing Zhao Chaoli Ma Haimiao Liao Donglei He Ming Chen Meng Huang Chen Huang | 2022 | International Journal of Minerals,Metallurgy and Materials2022，29，1： | 1 |
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