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nanoparticles reinforced magnesium matrix composites were fabricated by ultrasonic method. The AZ91 alloy and SiC nanoparticles with the average diameter of 50 nm were used as the matrix alloy... mechanism responsible for the composites reinforced with SiC nanoparticles was discussed. Key words: magnesium matrix composites; AZ91 alloy; SiC nanoparticles; ultrasonic method 1 Introduction......
Effects of combined addition of Y and Ca on microstructure and mechanical properties of die casting AZ91 alloy WANG Feng(王 峰), WANG Yue(王 越), MAO Ping-li(毛萍丽), YU Bao-yi(于宝义), GUO Quan... AZ91 alloy with combined addition of Y and Ca were investigated by optical microscopy, scanning electronic microscopy, X-ray diffractometry and mechanical property test. The results show......
Effect of Intermetallic Phases on Corrosion Initiation of AZ91 Alloy With Rare Earth Y AdditionLi-na Zhang1,Ruiling Jia1,2,Dan Li1,Wei Zhang2,Feng Guo11. School of Materials Science and Engineering...">The effect of the rare earth(RE) element Y on the microstructure of AZ91 Mg alloy is investigated.A detailed description of the procedure of identifying the intermetallic phases containing Y in the AZ91 Mg......
="ChDivSummary" name="ChDivSummary">The effects of SrCO3 on the microstructure of AZ91 magnesium alloy were investigated by OM, SEM, EDS, XRD and DTA analyses. The results show that AZ91 magnesium alloy with 1.0% SrCO3 addition has the best refining effect at 730 ℃ for 20 min, the average size of the α-Mg grain in AZ91 matrix alloy is reduced from about 91 μm to 58 μm, with reduction of about 36%. Based......
to the formation of network Al2 Ca phase and rod-like Al2 Y phase,improved the corrosion resistance of AZ91 magnesium alloy.Compared with AZ91 alloy,the corrosion rate of AZ91–1.5Ca–1.0Y alloy was decreased...Influences of Ca and Y Addition on the Microstructure and Corrosion Resistance of Vacuum Die-Cast AZ91 AlloyFeng Wang1,Jibao Li1,Jing Liu1,Dan Lv2,Pingli Mao1,Zheng Liu11. School of Material Science......
AZ91镁合金的凝固冷却速度与二次枝晶间距的定量关系研究 兰伟1,丁培道2,张丁非2,张保平2 (1.重庆科技学院,冶金及材料工程学院,重庆,400050;2.重庆大学,材料科学与工程学院,重庆,400045) 摘要:通过设计制作一套可获得不同凝固冷却速度的镁合金熔炼与浇注装置,采用多通道连续温度记录仪,获得了对应不同凝固冷却速度下的AZ91镁合金试样.用定量金相分析之截线法测定了各个试样的二次枝晶间距,并对不同凝固冷却速度下的组织特征做了简要分析.用数学回归的方法得到了AZ91镁合金的凝固冷却速度与二次枝晶间距的定量关系式. 关键词:AZ91; 凝固; 冷却速度; 枝晶间距; 定量关系; [全文内容正在添加中] ......
; 组织演变 中图分类号: TG146.2 文献标识码: A Microstructural characteristics of semisolid AZ91 magnesium alloy based on SIMA process ZHAI Qiu-ya, YUAN Sen, JIANG Bai-ling (School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, China) Abstract: The microstructural evolution of semisolid AZ91 magnesium alloy by SIMA process was investigated. The microstructure......
钇对AZ91在NaCl溶液中腐蚀的影响 赵艳娜1,朱元良1,齐公台2 (1.南阳理工学院,河南,南阳,473004;2.华中科技大学化学系,湖北,武汉,430074) 摘要:通过静态失重法,极化曲线测试研究了钇(Y)对AZ91镁合金腐蚀行为的影响.结果表明加入钇(Y)可在基体内形成块状的YAl2化合物,并使AZ91微观组织得到改善,减缓了在NaCl溶液中的腐蚀. 关键词:镁合金; 钇; 腐蚀; 微观结构; [全文内容正在添加中] ......
Mechanism of Effects of Rare Earths on Microstructure and Properties at Elevated Temperatures of AZ91 Magnesium Alloy Gao Ming1,Zhang Guoying1,Wei Dan1,Zhang Hui1 (1.College of Physical Science... boundaries (GBs) in AZ91 alloys were investigated. Similar calculations were performed on undoped and doped bulk α Mg for comparison. The results showed that Al atoms segregated at GBs in AZ91 alloys......
Mg-Al-C中间合金对AZ91镁合金组织和性能的影响 付群强1,黎业生1,李洪1,董定乾1 (1.江西理工大学材化学院,江西,赣州,341000) 摘要:通过真空烧结制备出Mg-Al-C中间合金,发现该合金可以有效地细化Mg-Al系AZ91合金的晶粒,细化后的AZ91合金力学性能显著提高,粗大且易于聚集成团的Mg17Al12相得以消除;分析认为其细化机制是在镁合金熔体中形成了大量的结晶形核质点Al4C3或Al-C-O化合物. 关键词:镁合金; 晶粒细化剂; Mg-Al-C中间合金; 细化机理; [全文内容正在添加中] ......