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渗铝所得的渗层.根据渗层中的Mg与Al的摩尔比,结合镁铝二元相图[9],可以推断渗层外层主要为Mg2Al3,内层为Mg17Al12. 图2 AZ91D镁合金冶金扩散渗铝层的截面SEM像 Fig.2 Cross-sectional SEM images of diffusion Al-alloyed layer on surface of AZ91D Mg alloy... of AZ91D Mg alloy before and after diffusion Al-alloyed treatment in 3.5% NaCl solution 图6所示为经冶金扩散处理前,后AZ91D样品在3.5 % NaCl溶液中的极化曲线.经冶金扩散处理 后,AZ91D镁合金样品的自腐蚀电位从未处理前的-1.52 V大幅上升至-1.32 V,这是由于镁铝金属间化合物的自腐蚀电......
初始取向对AZ31镁合金微观织构演化的影响吴新星1,杨续跃1,张雷1,张之岭1(1.湖南省长沙市中南大学材料科学与工程学院)摘 要:将从挤压棒材中截取的长轴与挤压方向分别成0°,45°和90°的AZ31镁合金长方体试样在中,高温度(523723 K)下沿长轴方向压缩变形,利用OM和SEM/EBSD技术观察和分析了...所有的晶粒都发牛了近90°的转动,基面由变形前平行于压缩方向转至与压缩方向垂直,45°试样只是在大应变时才发生晶粒的缓慢转动,而90°试样则几乎不发生晶粒转动.关键词:镁合金; 初始取向; 拉伸孪晶; 微观织构演化......
相场方法模拟AZ31镁合金的静态再结晶过程高英俊1,2,3,罗志荣1,胡项英3,黄创高3(1.广西壮族自治区南宁市广西大学物理科学与工程技术学院2.广西壮族自治区南宁市广西大学工程防灾与结构安全重点实验室3.辽宁省沈阳市科学院国际材料物理中心)摘 要:为了获得合金静态再结晶前的变形晶粒组织,应用网格畸变模型与相场模型结合,生成变形合金再结晶前的初始晶粒组织;针对合金不同变形区域的特征和体系储存能分布不均匀的特点,分别引入反映不同变形区域的储存能分布的权重因子和变形区域的特征状态因子,构造多状态的非均匀自由能密度函数.在此基础上,应用相场动力学方程模拟了AZ31镁合金的静态再结晶过程的微结构演化,系统地分析了再结晶转变动力学曲线和Avrami曲线,以及储存能释放规律和再结晶晶粒尺度分布.模拟得到的动力学规律......
化情况.由图5可看出,热处理前,5%TiB2/Al-7Si复合材料的硬度比基体合金提高了27%;加入1.5%Mg和3%Mg后,其硬度与基体合金相比分别提高了58%和65%;热处理没有改善未加Mg的A1-A3合金的硬度,但使添加镁合金的硬度明显提高,加入1.5%Mg和3%Mg后,与热处理前相比分别提高了29%和42%. 图5 基体及复合材料的硬度 Fig.5 ...文章编号:1004-0609(2009)09-1548-07 Mg对原位合成TiB2/Al-7Si复合材料的 微观组织及力学性能的影响 赵瑞锋1,刘忠侠1,杨明生2,张天清2,余焕伟1,任 波1,刘栓江1 (1. 郑州大学 物理工程学院,郑州 450052; 2. 登封电厂集团铝合金有限公司,登封 452477) 摘 要:采用K2TiF6和KBF4混合盐原位反......
] Fig.3 Hydrogen solubilities in pure Mg and AZ91 alloy[22] 表4 镁合金氢含量的实测值和数学模型计算值的比较 (p(H)=1.013 25×105 Pa) Table 4 Comparison of practical values and calculated values by model...数学模型计算值与已知的实测值相比较,该模型的合理性得到验证. 关键词:镁;镁合金;镁合金熔液;氢含量;数学模型 中图分类号:TG243+.1 文献标志码:A Mathematic model of hydrogen content in magnesium alloy melt XU Si-xiang, MA Ai-ping......
镁合金热变形下变形带的形貌和晶体学特征杨续跃1,2,姜育培1(1.湖南省长沙市中南大学材料科学与工程学院2.湖南省长沙市中南大学教育部,重点实验室有色金属材料科学与工程)摘 要:对不同温度单向压缩下AZ31镁合金不均匀形变组织的形貌和晶体学特征进行了研究.结果显示:形变组织具有很强的温度和应变敏感性;250℃时...400℃时,扭折界面发生明显的弯曲.对扭折带和其他变形带的特征进行了对比考察.关键词:镁合金; 不均匀变形; 变形带; 组织形貌; 孪晶; 扭折带......
Trans. Nonferrous Met. Soc. China 22(2012) 2014-2020 Biocorrosion property and cytocompatibility of calcium phosphate coated Mg alloy XU Li-ping1, ZHANG Er-lin2, YANG Ke3 1. Guangzhou Research... of Sciences, Shenyang 110016, China Received 10 January 2012; accepted 27 June 2012 Abstract: Calcium phosphate coated Mg alloy was prepared. The phase constitute and surface morphology were identified......
, and their effect on the mechanical properties of the Ca-addition Mg alloys have been reported [14-16]. In the present ZXM200 alloy, the formation of the second phase particles due to the addition of Ca to Mg-Zn-based alloy can be found in Fig. 5. Fig. 3 OIM and IPF maps obtained from EBSD on three sheets Fig. 4 OIM and IPF maps showing relationship between precipitates and very small grains......
Trans. Nonferrous Met. Soc. China 24(2014) s125-s128 Effect of electrolyte on mechanical properties of AZ31B Mg alloy in electrolytic plasma processing Byung Hyun AHN1, Jung Il SONG2, Bon Heun KOO1 1... properties of AZ31B Mg alloys can be enhanced by the proper selection of electrolyte agent. Key words: AZ31B Mg alloy; surface treatment; electrolytic plasma processing 1 Introduction Magnesium and its......
-Cu prepared in vacuum induction smelting furnace, together with some Mg. Then, the alloy was heat-treated, and different testing means were used to detect the experimental effects and its modification, strengthening and wear mechanisms were discussed. The results show that this master alloy has significant refining effects on the coarse primary Si, eutectic Si and α(Al), and adding Mg after......