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稀土元素和Ti对ZM5镁合金组织和性能的影响 总被引:1,自引:0,他引:1
用金相显微镜、X射线衍射仪分析了添加稀土元素Y、Nd和钛中间合金的Mg-8.5Al-0.5Zn(ZM5)合金的组织和相组成,测试了合金的室温力学性能。结果表明,添加稀土元素Y、Nd的ZM5镁合金中出现了新的镁.稀土相MgY、Mg12Nd,而在同时添加稀土元素Y、Nd和钛中间合金的合金中,还出现了新相Ti2Mg3Al18;添加稀土元素Y、Nd的ZM5镁合金在拉伸性能、硬度以及组织都明显优于ZM5镁合金,而同时添加稀土元素和Ti合金的镁合金其性能又显著优于单独添加Y或Nd的合金。 相似文献
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研究了复合添加Er和Sr对ZM5镁合金微观组织,力学性能,耐腐蚀性能的影响。结果表明,复合添加Er、Sr可有效细化合金第二相。ZM5-0.6%Er-0.15%Sr合金抗拉强度和伸长率分别达到普通ZM5镁合金的91.3%和107.5%,腐蚀速率为普通ZM5镁合金的50%。 相似文献
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为了提高镁合金的力学性能和铸造性能 ,试验研究了典型镁合金ZM5的各组元对性能的影响 ,特别研究了添加金属银对性能的改善。在此基础上采用正交试验法优选出新型镁合金GQMZ96的成分和配比 ,该合金与国内外常用镁合金相比 ,具有较好的力学性能和铸造性能 ,发展前景广阔 相似文献
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新型镁合金GQMZ96研究 总被引:4,自引:2,他引:2
为了提高镁合金的力学性能和铸造性能,试验研究了典型镁合金ZM5的各组元对性能的影响,特别研究了添加金属银对性能的改善。在此基础上采用正交试验法优选出新型镁合金GQMZ96的成分和配比,该合金与国内外常用镁合金相比,具有较好的力学性能和铸造性能,发展前景广阔。 相似文献
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对不同成分Mg-Ga-Hg-Ce-Y新型稀土合金进行铸造工艺试验,并进行了耐腐蚀性能、充放电性能和显微组织分析。结果表明,同时添加Ce、Y的新型汽车电池稀土镁合金的腐蚀失重率,较不含Ce、Y和仅含Ce的合金分别减少25%、9%;同时添加Ce、Y的稀土镁合金的放电容量保持率较不含Ce、Y和仅含Ce的合金分别提高5.4%、1.7%,表现出更佳的耐腐蚀性能和充放电性能。 相似文献
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The effects of rare earth (RE) elements Y and Nd on the microstructure and mechanical properties of Mg-6Al magnesium alloy were investigated. The results show that a proper level of RE elements can obviously refine the microstructure of Mg-6Al magnesium alloys, reduce the quantity of/β-Mg17Al12 phase and form Al2Y and AI2Nd phases. The combined addition of Y and Nd dramatically enhances the tensile strength of the alloys in the temperature range of 20-175℃. When the content of RE elements is up to 1.8%, the values of tensile strength at room temperature and at 150℃ simultaneously reach their maximum of 253 MPa and 196 MPa, respectively.The main mechanisms of enhancement in the mechanical properties of Mg-6Al alloy with Y and Nd are the grain refining strengthening and the dispersion strengthening. 相似文献
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Microstructure and mechanical properties of AZ81 magnesium alloy with Y and Nd elements 总被引:2,自引:0,他引:2
The effects of rare earth(RE) elements Y and Nd (w(Y)/w(Nd)=3:2) with total content of 1%-4% on microstructures and elevated temperature mechanical properties of AZ81 magnesium alloy were investigated. The results show that, proper content of rare earth elements makes the microstructures of AZ81 magnesium alloy refine obviously and the quantity offl-MglTAll2 phases reduce, and Al2Y and Al2Nd form. After solid solution treatment, with increasing content of rare earth elements, the tensile strength and elongation of the alloys (at room temperature, 150 ℃ and 250 ℃) increase first, then decrease. When the content of rare earth elements is up to 2%, the values of tensile strength at room temperature and 150 ℃ are up to their maxima simultaneously, 282 MPa and 212 MPa, respectively. Meanwhile, the values of elongation at room temperature and at elevated temperature are also up to their maxima, 13% and 15%, respectively. 相似文献
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微量Er对ZM5镁合金微观组织及腐蚀性能的影响 总被引:1,自引:0,他引:1
利用金相显微镜、扫描电镜、能谱分析、X射线衍射分析、失重法及动电位扫描测试法,研究了微量Er对铸态ZM5镁合金显微组织和腐蚀性能的影响.结果表明微量Er可细化ZM5镁合金的铸态组织,提高耐腐蚀性能;在0~0.6%范围内,随着Er含量的增加,合金中的Mg17Al12相由粗大、连续树枝状分布逐渐转变为细小、弥散的颗粒状均匀分布;当Er含量为0.6%时,组织中有Al3Er相生成.随着Er添加量的逐渐增加,ZM5镁合金的平均腐蚀速率逐渐降低;当Er含量为0.6%时,在3.5%NaCl水溶液中浸泡的腐蚀速率为2.125 6 mg/(cm2·d),仅为常规ZM5镁合金的20%.微量Er使得ZM5镁合金在3.5% NaCl溶液中的自腐蚀电位升高,自腐蚀电流降低. 相似文献
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The atmospheric corrosion behaviour of peak aged Mg–5Y–7Gd–1Nd–0·5Zr alloys in typical land (Beijing) and marine (Qingdao) environments were investigated by optical microscopy, SEM and X-ray diffraction. The weight loss rates and residual mechanical properties were analysed. The atmospheric corrosion rates of specimens in a typical marine environment were higher than those in land environment. The results demonstrated that temperature, relative humidity and inorganic salts at field exposed sites played an important role in atmospheric corrosion behaviours. The results of our investigation may find wider applications for Mg–rare earth alloys in atmospheric environments. 相似文献