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A high-performance Mg-Er-Zn-Zr alloy with low Er/Zn mass ratio 被引量:2
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作者 杜兴蒿 魏成宾 +3 位作者 武保林 洪敏 夏宇航 李万鹏 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第11期4123-4127,共5页
The microstructure and properties of a quarternary Mg-8Er-5Zn-0.5Zr(mass fraction, %) alloy with the low Er/Zn mass ratio of 1.60 were investigated. It is found that despite of the low Er/Zn mass ratio, the microstruc... The microstructure and properties of a quarternary Mg-8Er-5Zn-0.5Zr(mass fraction, %) alloy with the low Er/Zn mass ratio of 1.60 were investigated. It is found that despite of the low Er/Zn mass ratio, the microstructure of the as-prepared alloy is composed of α-Mg, W phase with face-centered cubic structure and long packed stacking ordered(LPSO) phase. As expected, the extruded and annealed alloy possesses high yield stress(310 MPa) and good elongation(14%) at room temperature. The superior mechanical properties can be interpreted in terms of the promising microstructure characteristic of fine α-Mg recrystallized grains embedded with high-density fine lamellar-shaped LPSO phase and block W phase structure. 展开更多
关键词 Mg ALLOYS EXTRUSION mechanical properties microstr
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CAD到GIS数据的属性匹配和转换的研究 被引量:10
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作者 蒋丽 邹时林 《测绘地理信息》 2017年第3期58-62,共5页
利用MicroStration数据格式作为中间桥梁,结合FME数据转换机制,详细阐述了AutoCAD数据到MicroStration数据属性的自动匹配的过程;最终实现基于FME的MicroStration数据到ArcGIS数据的转换。
关键词 数据转换 AUTOCAD microstration FME ARCGIS 属性匹配
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Microstructure and mechanical properties of Ti-6Al-4V components fabricated by laser micro cladding deposition 被引量:8
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作者 Bo Yao Xu-Long Ma +1 位作者 Feng Lin Wen-Jun Ge 《Rare Metals》 SCIE EI CAS CSCD 2015年第7期445-451,共7页
Laser micro cladding deposition manufacturing(Ll CDM) is a newly developed rapid manufacturing method for metals.The Ll CDM technology adopts a novel powder feeding method based on alternating friction and inertia for... Laser micro cladding deposition manufacturing(Ll CDM) is a newly developed rapid manufacturing method for metals.The Ll CDM technology adopts a novel powder feeding method based on alternating friction and inertia force, and this powder feeding method can effectively improve the accuracy and orientation of the powder injection, resulting in a smaller molten pool size and a higher cooling rate of liquid metal.Therefore, the components fabricated by Ll CDM could obtain the finer microstructures and the improved mechanical properties.It is found that the components fabricated by Ll CDM are fully dense free of cracks or pores and exhibit columnar prior b grains with a finer acicular a0 phase microstructure.The microhardness(HV0.2) of the thin-wall component is HV 400–HV 500 in the majority part of the cross section and can reach about HV 850 in the top region.The ultimate tensile strength(UTS) and elongation show insignificant dependence on the testing directions of the tensilespecimens.The UTS is between 1,002 and 1,100 MPa, and the elongation is between 10.0 % and 14.7 %. 展开更多
关键词 Laser micro cladding deposition TI-6AL-4V Microstr
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