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国家重点基础研究发展计划(2008DFR50040)

作品数:5 被引量:54H指数:5
相关作者:黄光胜齐福刚张孝华张丁非潘复生更多>>
相关机构:重庆大学中国工程物理研究院更多>>
发文基金:国家重点基础研究发展计划国家自然科学基金更多>>
相关领域:一般工业技术金属学及工艺化学工程更多>>

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不同加工状态AZ31镁合金电化学性能研究(英文)被引量:7
2014年
为选择一种高性价比的镁电池阳极材料,借助电化学工作站、光学显微镜(OM)、扫描电子显微镜(SEM)和X射线能谱分析(EDS)对不同加工状态的AZ31B镁合金电化学性能进行研究。分别将挤压、轧制、铸轧和铸态AZ31B镁合金作为阳极材料,测试其电化学性能。结果表明,在4种加工状态下,挤压态镁合金是性价比最高的一种阳极材料;其组织由均匀细小的晶粒和第二相组成,拥有最负的平衡电位,最低腐蚀电流密度和最小自腐蚀速率;挤压态样品腐蚀后,表面产生疏松细小,且均匀分布的腐蚀产物,降低了阳极极化,增加了阳极利用率。轧制和铸轧态的AZ31B镁合金的电化学活性和耐蚀性能相对挤压态的较低。铸态AZ31B镁合金由于较粗大的晶粒、第二相和铸造缺陷,表现出不稳定的放电曲线和较正的放电电位。不同状态AZ31镁合金的腐蚀均以点蚀为主。
邓金凤黄光胜赵炎春王蓓
关键词:AZ31镁合金电流密度放电
Effect of Y addition on microstructure and mechanical properties of Mg-Zn-Mn alloy被引量:11
2014年
The effects of Y on the microstructure and mechanical properties of Mg-6Zn-lMn alloy were investigated. The results show that the addition of Y has significant effect on the phase composition, microstructure and mechanical properties of Mg-6Zn-lMn alloy. Varied phases compositions, including Mg7Zn3, I-phase (Mg3YZn6), W-phase (Mg3Y2Zn3) and X-phase (MgI2YZn), are obtained by adjusting the Zn to Y mass ratio. Mn element exists as the fine Mn particles, which are well distributed in the alloy. Thermal analysis and microstructure observation reveal that the phase stability follows the trend of X〉W〉/〉MgTZn3. In addition, Y can improve the mechanical properties of Mg-Zn-Mn alloy significantly, and the alloy with Y content of 6.09% has the best mechanical properties. The high strength is mainly due to the strengthening by the grain size refinement, dispersion strengthening by fine Mn particles, and introduction of the Mg-Zn-Y ternary phases.
齐福刚张丁非张孝华潘复生
关键词:YMICROSTRUCTUREFRACTURE
Influence of strain rate on microstructure and formability of AZ31B magnesium alloy sheets被引量:10
2013年
The effects of strain rate on microstructure and formability of AZ31B magnesium alloy sheets were investigated through uniaxial tensile tests and hemispherical punch tests with strain rates of 10^-4, 10^-3, 10^-2, 10^-1 s^-1 at 200℃. The results show that the volume fraction of dynamic recrystallization grains increases and the original grains are gradually replaced by recrystallization grains with the strain rate decreasing. A larger elongation and a smaller r-value are obtained at a lower strain rate, moreover the erichsen values become larger with the strain rate reducing, so the formability improves. This problem arises in part from the enhanced softening and the coordination of recrystallization grains during deformation.
王利飞黄光胜李红成张华
关键词:FORMABILITY
Key R&D activities for development of new types of wrought magnesium alloys in China被引量:12
2010年
Many researchers in China are actively engaged in the development of new types of wrought magnesium alloys with low cost or with high-performances and novel plastic processing technologies.The research activities are funded primarily through four government-supported programs:the Key Technologies R&D Program of China,the National Basic Research Program of China,the National High-tech R&D Program of China,and the National Natural Science Foundation of China.The key R&D activities for the development of new wrought magnesium alloys in China are reviewed,and typical properties of some new alloys are summarized. More attentions are paid to high-strength wrought magnesium alloys and high-plasticity wrought magnesium alloys.Some novel plastic processing technologies,emerging in recent years,which aim to control deformation texture and to improve plasticity and formability especially at room temperature,are also introduced.
潘复生张静王敬丰杨明波韩恩厚陈荣石
关键词:MICROSTRUCTUREPROPERTIES
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