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metallurgical analysis of multiple launch railgun materials

Journal of Harbin Institute of Technology(New Series) 2011年第6期18卷 93-97页

作者：战再吉彭晓婷吴培莲梁波王振春温银堂王文魁 State Key Laboratory of Metastable Materials Science and Technology School of Science and TechnologyYanshan University School of Materials Science and Engineering Harbin Institute of Technology

Railgun materials play an important role in electromagnetic launch,and its performance has great effect on the shot-efficiency and lifetime of the *** this paper,the effect of shots number on the performance of multiple launch railgun material under high current conditions is studied by metallurgical *** metallographys of kinds of rails'surface at various locations are observed,and the details of damage zones at different positions are *** results indicate that molten aluminum from the armature deposits on the rail surface to form a thin *** deposited film becomes thicker and multi-layered with the increase of shots *** the velocity is greater than 2 km /s,the gouge phenomenon always *** gouge volume of material is measured by 3D laser image and the qualitative observations of the damage are *** evidences show that gouge phenomenon mainly causes by the kinetic energy of the armature and it is related to the shear strength of rail materials *** the addition of nano-sized ceramic powders,the shear strength of rail materials increases,the volume of gouge decreases during multiple launches.

关键词： railgun metallurgical analysis multiple launch rail materials

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Recent progress on the application of LIBS for metallurgical online analysis in China

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Frontiers of physics 2012年第6期7卷 679-689页

作者： Feng-Zhong Dong Xing-Long Chen Qi Wang Lan-Xiang Sun Hai-Bin Yu Yun-Xian Liang Jing-Ge Wang Zhi-Bo Ni Zhen-Hui Du Yi-Wen Ma Ji-Dong Lu Anhui Institute of Optics and Fine Mechanics Chinese Academy of SciencesScience IslandHefei 230031China School of Instrument Science&Opto-Electronic Engineering Hefei University of TechnologyHefei 230009China Shenyang Institute of Automation Chinese Academy of SciencesShenyang 110016China College of Precision Instument&Opto-Electronic Engineering Tianjin UniversityTianjin 300072China College of Electric Power South China University of TechnologyGuangzhou 510640China

Recent progress on the application of laser-induced breakdown spectroscopy （LIBS） for metallurgical analysis particularly achieved by Chinese research community is briefly reviewed in this article. The content is mainly focused on the progress in experimental research and calibration methods toward LIBS applications for metallurgical online analysis over the past few years. Different experiment setups such as single-pulse and double-pulses LIBS schematics are introduced. Various calibration methods for different metallic samples are presented. Quantitative results reported in the literature and obtained in the analysis of various samples with different calibration methods are summarized. At the last section of this article, the difficulties of LIBS application for molten metal analysis in a furnace are discussed.

关键词： laser-induced breakdown spectroscopy (LIBS) metallurgical analysis molten metal calibration methods

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