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Aluminothermic Reduction of K_2ZrF_6 for Preparation of Al-Zr master alloy

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Rare Metals 1999年第2期18卷 40-43页

作者： Rajagopalan P.K., Sharma I.G. and Krishnan T.S. Materials Processing Division, Bhabha Atomic Research Centre, Mumbai 400085, India Bose D.K. Uranium Extraction Division, Bhabha Atomic Research Centre, Mumbai 400085, India Materials Processing Division Bhabha Atomic Research Centre Mumbai 400085 India Uranium Extraction Division Bhabha Atomic Research Centre Mumbai 400085 India

This paper summarizes a process for the preparation of Al5%Zr master alloy by the reduction of K2ZrF6 with aluminium. The reduction in grain size of aluminium by addition of known quantity of master alloy is also stud... 详细信息

关键词： Grain refinement master alloy alloy yield Zirconium recovery

Grain Refinement of Aluminium by master alloy AlTi6C1

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Rare Metals 1993年第3期12卷 187-192页

作者：冯庆玲王昶明蒋子文 Tsinghua University Beijing 100084China Beijing Light Industry Institute Beijing 100037China Huaxia Garden Centre Beijing 100005China

For the grain refinement of super pure aluminium and commercial pure aluminium,Al-Ti-C master al- loy is better than Al-Ti *** was shown by scanning electron microscope(SEM)and electron-probe mi- croanalyser(EPMA)that when the amount of titanium added is less than 0.15%,grain refinement of super pure aluminium is due to TiC particles rather than peritectic *** addition,the presence of impurity elements in commercial pure aluminium plays an important role in grain *** process of grain re- finement of aluminium by TiC is discussed in light of the TiC thesis.

关键词： Aluminium Grain refinement TiC master alloy

The grain refinement effect of the typical master alloys on Mg-Li-Al cast alloy

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The grain refinement effect of the typical master alloys on ...

Ballistic performance of titanium-based layered composites made using blended elemental powder metallurgy and hot isostatic pressing

2011中国材料研讨会

作者：蒋斌殷恒梅重庆大学材料科学与工程学院

Commercial Al-3Ti-1C and Al-5Ti-1B master alloys with different levels were added into Mg-Li-Al alloys in order to refine the *** effects of their addition levels on grain refinement of Mg-Li-Al cast alloy were investigated and the mechanism of the grain refinement was *** result shows that the addition of Al-3Ti-1C master alloy would reduce the grain size of LA141 cast alloy from 900μm to 400μm,while the addition of Al-5Ti-1B master alloy made the grain size of LA51 cast alloy reduced from 500μm to 240 μ*** comparison experiment and crystallographic calculation,the grain refining mechanism is regarded as the heterogeneity nucleation of TiC and TiB2,because of the less than 10% mismatches of TiC and β-Li and of TiB2 and α-Mg.

关键词： Magnesium lithium alloy master alloy grain refinement crystallography.

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DEFENCE TECHNOLOGY 2024年第9期39卷 1-14页

作者： Markovsky, Pavlo Janiszewski, Jacek Savvakin, Dmytro Stasyuk, Oleksandr Fikus, Bartosz Samarov, Victor Ellison, Vianey Prikhodko, Sergey, V NAS Ukraine GV Kurdyumov Inst Met Phys 36Academician Vernadsky Blvd UA-03142 Kyiv Ukraine Jaroslaw Dabrowski Mil Univ Technol 2Gen Sylwester Kaliski Str PL-00908 Warsaw 46 Poland Synertech Inc 11711 Monarch St Garden Grove Los Angeles CA 92841 USA Univ Calif Los Angeles Dept Mat Sci & Engn Los Angeles CA 90095 USA

Metal matrix composites tiles based on Ti-6Al-4V (Ti64) alloy, reinforced with 10, 20, and 40 (vol%) of either TiC or TiB particles were made using press-and-sinter blended elemental powder metallurgy (BEPM) and then bonded together into 3-layer laminated plates using hot isostatic pressing (HIP). The laminates were ballistically tested and demonstrated superior performance. The microstructure and properties of the laminates were analyzed to determine the effect of the BEPM and HIP processing on the ballistic properties of the layered plates. The effect of porosity in sintered composites on further diffusion bonding of the plates during HIP is analyzed to understand the bonding features at the interfaces between different adjacent layers in the laminate. Exceptional ballistic performance of fabricated structures was explained by a significant reduction in the residual porosity of the BEPM products by their additional processing using HIP, which provides an unprecedented increase in the hardness of the layered composites. It is argued that the combination of the used two technologies, BEPM and HIP is principally complimentary for the materials in question with the abilities to solve the essential problems of each used individually.

关键词： Metal matrix composites Powder metallurgy Titanium hydride powder master alloy Titanium carbide Titanium boride Hot isostatic pressing Ballistic tests TI-6AL-4V alloy TIB COMPOSITES ARMOR STEELS BEHAVIOR MICROSTRUCTURE PROJECTILES AEROSPACE

Grain refinement of Mg-Li-Al cast alloys by adding typical master alloys

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Progress in Natural Science:Materials International 2011年第3期21卷 236-239页

作者： Bin JIANG~(1,2),Qing-shan YANG~2,Ming-xing ZHANG~3,Dong QIU~3,Rui-hong LI~2,Fu-sheng PAN~(1,2) 1.National Engineering Research Center for Magnesium alloys,Chongqing University,Chongqing 400044,China 2.College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China 3.Division of Materials,School of Mechanical and Mining Engineering, The University of Queensland,St Lucia,QLD 4072,Australia National Engineering Research Center for Magnesium alloys Chongqing University College of Materials Science and Engineering Chongqing University Division of Materials School of Mechanical and Mining Engineering The University of Queensland

Commercial Al-3Ti-1C and Al-5Ti-1B master alloys were added in order to refine the grains of Mg-Li-Al *** effects of their addition levels on grain refinement of Mg-Li-Al cast alloy were investigated and the mechanism of the grain refinement was *** results showed that the addition of Al-3Ti-1C master alloy reduced the grain size of LA141 cast alloy from 900μm to 400μm,while the addition of Al-5Ti-1B master alloy reduced the grain size of LA51 cast alloy from 500μm to 240μ*** grain refining mechanism was the heterogeneity nucleation of TiC and TiB2,because of less than 10%mismatches of TiC/β-Li and TiB2/α-Mg.

关键词： magnesium lithium alloy master alloy grain refinement

Influence of Al-Mn master alloys on microstructures and electrochemical properties of Mg-Al-Pb-Mn alloys

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Transactions of Nonferrous Metals Society of China 2014年第2期24卷 423-430页

作者：陈彬王日初彭超群冯艳王乃光中南大学材料科学与工程学院长沙410083

Mg-Al-Pb alloy is one of the newly developed materials for the seawater activated batteries. As-cast Mg-6Al-5Pb and Mg-6Al-5Pb-0.5Mn alloys with different additions of Al-15%Mn （mass fraction）, Al-30%Mn and Al-50%Mn master alloys were prepared by melting and casting. Their microstructures were observed by optical microscopy and scanning electron microscopy. The electrochemical properties, hydrogen evolution and mass loss of Mg-6Al-5Pb-0.5Mn alloys were studied. The results show that Mg-6Al-5Pb-0.5Mn alloy added with Al-50%Mn master alloy provides more negative corrosion average potential （-1.66 V）, smaller corrosion current density （7 μm/cm2） and lower free corrosion rate （0.51 mg·cm-2·h-1） than other alloys. This is probably attributed to the presence of Al11Mn4 phase, which facilitates the self-peeling of corrosion products and enlarges the electrochemical reaction area as well as enhances the electrochemical activity.

关键词： Al-Mn Mg-Al-Pb-Mn Al-Mn master alloy Mg-Al-Pb-Mn hydrogen evolution corrosion seawater activated batteries

Grain refinement of primary silicon in hypereutectic Al-Si alloys by different P-containing compounds

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China Foundry 2021年第1期18卷 37-44页

作者： Benson Kihono Njuguna Jia-yan Li Yi Tan Qian-qian Sun Peng-ting Li School of Materials Science and Engineering Dalian University of TechnologyDalian116024China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai200444China Shandong Shanda Al&Mg Melt Technology Company Limited Jinan250061China

The grain refinement behavior of Si-3 P,Si-25 Mn-10 P,and Al-10 Si-2 Fe-3 P master alloys on hypereutectic Al-24 Si alloy was *** analysis indicates that the P-containing compounds in the three master alloys are Si P,Mn P,and Al P,*** coarse flower-like primary silicon in the Al-24 Si alloy transforms into smaller,well-distributed blocks with the addition of various master *** pouring at 840°C,the average grain size of the primary silicon refined by Si-25 Mn-10 P master alloy with a holding time of 30 min is about 18μm,which is significantly smaller than those refined by Si-3 P and Al-10 Si-2 Fe-3 P master *** grain size shows an increasing trend when the holding time is further *** holding temperature has a positive effect on the grain refinement of Si-25 Mn-10 P master *** grain refinement mechanism of the three master alloys was also discussed.

关键词： grain refinement primary silicon master alloy AlP compound