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cheaper than other BMGs, but also due to the unique combination of high physical, chemical and mechanical properties[4-5]. Since INOUE et al[6] synthesized Fe-Co-(Zr, Nb, Ta)-(Mo, W)-B amorphous alloys...) at a heating rate of 10 K/min. The dilation measurement, as described by VLASAK et al[9], was applied to measuring the viscosity of glassy alloys. In this method, the overall length changes, Δl, may......
Al-Mg-Sc合金的剥落腐蚀性能 柏振海1,范云强2,罗兵辉1,周华2,谢绍俊2 (1.中南大学材料科学与工程学院,湖南,长沙,410083;2.西南铝业集团公司技术中心,重庆,401326) 摘要:采用目视剥落腐蚀敏感性试验考察了微量Sc对Al-Mg合金剥落腐蚀性能和力学性能的影响.不同Mg,Sc含量的Al-Mg合金的剥落腐蚀及力学性能测试表明,合金的剥落腐蚀性能与合金的Mg含量和热处理工艺有很大的关系,Mg含量低于5.5%时合金有很好的抗剥落腐蚀性能;随着Mg含量的增加,合金的强度上升,稳定化温度提高使合金的强度下降.冷加工使合金出现了(220),(311)织构. 关键词:Al-Mg-Sc合金; 剥落腐蚀; 力学性能; [全文内容正在添加中] ......
; 1 Introduction Al-Ti-B and Al-Ti-C master alloys are good refiners for Al and its alloys[1-3]. Compared with TiB2 in Al-Ti-B master alloys, TiC particles in Al-Ti-C grain refiner as the heterogeneous nucleation core have smaller aggregation tendency which is not affected......
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Engineering,Nanchang University摘 要:In this study, two kinds of Al–La master alloys were prepared by ultrasonic method and ordinary mixmelting method, and both of the alloys were added into the Al alloy.Then, the microstructure of Al–La master alloy and the modification effect on the Al alloy were investigated using optical microscope(OM), X-ray......
Master方程的修正及其对BA模型度分布的计算王双进,李凌云,张建河北工业大学理学院摘 要:Master方程是计算无标度网络度分布演化规律的一种常用方法.提出了对原始的Master方程进行修正,加入了节点增长机制,修正后的Master方程具有离散性,能够更精确,更有效的计算真实复杂网络的度分布演化规律.用修正的Master方程分析BA模型度分布的解析式并计算,由此得到BA模型度分布对数图.把离散性的Master方程与连续性的平均场理论进行对比分析,并在同一坐标系下分别做出用两种理论计算的BA模型度分布的对数图.关键词:Master方程;BA模型;度分布;节点增长机制;......
Preparation of Yttrium－Barium－Copper Trinary Master Alloys by Electrolysis from Molten Fluoride－oxide童叶翔,刘冠昆,杨绮琴,洪惠婵摘 要:ＰｒｅｐａｒａｔｉｏｎｏｆＹｔｔｒｉｕｍ－Ｂａｒｉｕｍ－ＣｏｐｐｅｒＴｒｉｎａｒｙ ＭａｓｔｅｒＡｌｌｏｙｓｂｙＥｌｅｃｔｒｏｌｙｓｉｓｆｒｏｍ ＭｏｌｔｅｎＦｌｕｏｒｉｄｅ－ｏｘｉｄｅＴｏｎｇＹｅｘｉａｎｇ(童叶翔)；ＬｉｕＧｕａｎｋｕｎ(刘冠昆)...关键词:......
]. Al-Ti-B type master alloys are added to the melt in order to introduce potent particles, Al3Ti and TiB2, which are effective nucleant substrates for the primary α(Al) phase. Although many studies of grain refinement have been performed, these have mostly considered the action, mechanism and development of commercial grain refiners[8-9]. Production of Al-Ti-B master alloys involves reaction......
Effect of Y Addition on Microstructure and Constituent Phases of Al-Ti-C Master Alloy Zhang Jinshan1,Liang Wei1,Xu Chunxiang1,Lv Zhengling1,Lu Binfeng1 (1.School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China) Abstract:Al-Ti-C master alloy was prepared by SHS (Self-propagating High temperature Synthesis)-melting technique. Effect of yttrium......
of the Al-5C master alloys. For grain refinement tests, commercially pure Mg (>99.9%), Al (>99.9%), Zn (>99.9%) and Mg-4.5Mn master alloy were used for preparing AZ31 alloy in a magnesia... particles on as-cast grain size in aluminum alloys [J]. Acta Materialia, 2004, 52: 3859-3868. [16] HAN Guang, LIU Xiang-fa, DING Hai-min. Grain refinement of Mg-Al based alloys by a new Al-C master......
