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 Wysłany: ¦ro 15:08, 12 Sty 2011 Temat postu: ugg italia Beijing Meeting high-precision casting |
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Beijing Meeting high-precision casting plant
% Rare-earth-rich ce instantaneous fatigue specimen in Figure 8 SEM photographs of the Mg/MgA1 off region to the fragility of the interface. After adding Ce-rich rare-earth, Ce will give priority to chemical stability and aluminum combine to form a higher A1Ce. Phase _1, so they can effectively prevent grain boundary sliding and crack propagation and improve the fatigue properties of magnesium alloys. By the energy spectrum (see Figure 6c) can be seen that the inclusions cause the crack generally the source of metal oxides, carbides. Ce-rich rare-earth magnesium alloy on the removal of oxygen and hydrogen plays a significant role [1,ugg italia, reducing the carbon pores and oxide inclusions and other defects and improve the casting quality, reduce the load during the crack source in the production, thereby increasing alloy fatigue performance. 3 Conclusions (1) Add an appropriate amount of Ce-rich rare earth can improve the mechanical properties of magnesium alloy AZglD and fatigue performance, when the Ce-rich rare-earth was 1% when the mechanical properties and fatigue strength increased by a big margin,moncler daunenjacke, the effect is better. (2) SEM evaluation of fatigue crack propagation area and the instantaneous fault zone indicate that Ce-rich rare earth magnesium alloy samples Ce-rich rare-earth than not added refinement of the sample tissue, the plastic increases. In the same experimental conditions, the Ce-rich rare-earth samples to add the fatigue crack growth rate is smaller, longer fatigue life, fatigue strength is higher. References [1] Meng Shukun, Reflections on the Handling, Han Wei, et al. Development of China Magnesium [J]. China Nonferrous Metals, 2006, ( : 1921. [2] Liu Wenhui, Liu Haifeng, HOU Jun, et al. High-strength development of high-temperature magnesium alloys [J]. Automobile Technology & Material, 2003 (4) :12-15. [3] Gao Hongtao, Wu Guohua, Ting Wen-chiang. Fatigue Properties of Magnesium Alloy Research [J]. Foundry Technology, 2003,24 (4); 266-268. [4] Bian Zhao Shao, Wang Zhong Bao. Fatigue design [M]. Beijing: Mechanical Industry Press, 1992.752 [5] Chun-Hua, Zou Jian ten. Fatigue Analysis Methods and Applications [M]. Beijing: National Defence Industry Press,moncler outlet, 1991. [6] Qi Qing-Ju, Liu Yongbing, Yang Xiaohong. Magnesium alloys and their applications in the automotive industry and prospects [J]. Automotive Engineering, 2002 (2) :94-100. '[7] Common tiger. SiC / Al composite material fatigue crack propagation behavior [D]. Xi'an: Xi'an Institute of Technology, 2005. [8] XU Yan months. Magnesium matrix composites SiCw/AZ91 Low Cycle Fatigue Behavior of [D]. Shenyang: Shenyang University of Technology, 2001. [9] Qu-Dong Wang, Lv Yizhen. Rare Earth in Cast Magnesium Alloys [J]. Special Casting & Nonferrous Alloys, I999 (1) :40-43. [10] Wang Lishi, Duan Han bridge. Rare Earth on AZ91 magnesium alloy and properties [J]. Special Casting & Nonferrous Alloys,Moncler online, 2000 (3) :37-41. [11] GOKENJ, RIEMANNW. DampingbehaviourofAZ91magnesi-umalloywithcracks [J], MaterialsScienceandEngineering, 2004,22 (3) 417-421. [12] WOLFB, FLECKCD,air jordans, EIFIERD. CharacterizationofthefatiguebehaviourofthemagnesiumalloyAZ91Dbymeansofmechanicalhysteresisandtemperaturemeasurements [J]. InternationalJour-nalofFatigue ,2004,26:1357-1363. (Editor: Chen Wei-chen)
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