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| 1 | Effects of Sc, Zr and Tion the microstructure and properties of Al alloys with high Mg content显示文摘The effects of trace Sc, Zr, and Ti on the microstructure and hardness of Al alloys with high Mg content (Al-6Mg, Al-8Mg, and Al-10Mg) were studied by optical microscope, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Brinell hardness. The grain size of the ascast alloys was refined by the addition of Sc and Zr, and it was further refined by the addition of Ti. With the same contents of Sc, Zr, and Ti, an increase in Mg content was beneficial to the refinement due to the solution of Mg into α-Al. The refined microstructures of the as-cast alloys were favorable for Brinell hardness. Addition of Sc, Zr, and Ti to the Al-10Mg alloy results in the improvement of peak hardness and it is about 45% higher than that of the Al-10Mg alloy, which is due to fine precipitations of Al3(Sc1-xZrx), Al3(Sc1-xTix), and Al3(Sc1-x-yZrxTiy). | WANG Xu CHEN Guoqin LI Bing WU Lianmei JIANG Darning | 2010 | Rare Metals2010，29，1： | 18 |
| 2 | EFFECT OF LASER SCANNING SPEED ON PHASE CONSTITUTION AND WEAR RESISTANCE OF LASER CLADDING HARD FACING ALLOY STELLITE 12显示文摘Effect of laser scanning speed on phase constitution,microstructure,microhardness and wearresistance of laser-cladding hard facing alloy Stellite 12 has been investigated by means of across-flow-type CO2 laser of 1.5 kW.The laser-cladding layer on the alloy consists of ma-trix phase of suppersaturated solid solution γ(Co,Cr)and complex hexagonal carbideM7C3.Under certain condition,at higher laser scanning speed,the suppersaturated solubilityof elements increases in γ(Co,Cr),and the precipitation of the complex carbtde M7C3 de-creases,so the microhardness increases and the wear resistance decreases.But at slower laserscanning speed,more complex carbide M7C3 may precipitate,and the wear resistance may beimproved.Therefore,it is believed that the principal factor in improving wear resistance is theprecipitation of carbide M7C3,while increment of microhardness is the suppersaturated solu-bility of elements in matrix phase γ(Co,Cr). | XU Yourong ZHANG Henghua CHEN Darning XIE Fuchun XU Mingyu Shanghai University of Science and Technology,Shanghai,ChinaCHEN Lanying SU Baorong QIAN Hongbin Shanghai Optics and Fine Mechinery Research Institute,Academia Sinica,Shanghai,China XU Yourong,professor,Department of Materials Science and Engineering,Shanghai University of Science and Technology,Shanghai 201800,China | 1993 | Acta Metallurgica Sinica(English Letters)1993，6，5： | 3 |
| 3 | Numerical method for solution of strongly coupled binary alloy solidification problems 显示文摘 | XU Darning LI Qingchun | 1991 | Numerical Heat Transfer Part A1991，20，2： | 1 |
| 4 | Effect of Mg content on the mechanical properties and microstructure of Gf/Al composite显示文摘 | WANG Xu JIANG Darning WU Gaohui | 2008 | Materials Science and Engineering A2008，497，12： | 1 |
| 5 | Feasibility of integrated seed making and directional solidification of TiA1 alloy using cold crucible显示文摘 | Zhang Chengjun Fu Hengzhi Xu Darning | 2009 | Trans Nonferrous Metals Soc China2009，19，： | 1 |
| 6 | Numerical simulation of heat,mass and momentum transport behaviors in directionally solidifying alloy castings under electromagnetic fields using an extended direct-simple scheme显示文摘 | XU Darning BAI Yunfeng GUO Jingjie | | 0，，7： | 1 |
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