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添加Cu对M5合金在500℃过热蒸汽中耐腐蚀性能的影响李士炉1,姚美意1,张欣1,耿建桥1,彭剑超2,周邦新1(1.上海市上海大学材料研究所2.上海大学 微结构重点实验室)摘 要:用高压釜腐蚀实验研究了添加0.05%-0.5%Cu(质量分数)对M5(Zr-1%Nb)合金在500℃/10.3 MPa过热蒸汽中耐腐蚀性能的影响;用TEM和SEM分别观察了合金基体和腐蚀后氧化膜的显微组织.结果表明:Cu含量低于0.2%时,随着Cu含量的增加,合金的耐腐蚀性能得到明显改善;继续提高Cu含量则对进一步改善合金耐腐蚀性能的......
电弧熔炼态Laves相Cr2Nb/Cr合金的微观组织演变李克伟1,李双明1,傅恒志1(1.陕西省西安市西北工业大学凝固技术国家重点实验室)摘 要:采用真空非自耗电弧熔炼法制备了Cr-12%Nb(原子分数,下同)和Cr-20%Nb 2种成分合金的纽扣锭,利用XRD,OM,SEM和EDS对电弧熔炼态纽扣锭不同位置的组织及其竞争生长进行了研究.结果表明:Cr-12%Nb合金纽扣锭底部为细小的离异共晶,中部和顶部则由粗大的初生Cr相和共晶组织(Cr2Nb+Cr)组成.而Cr-20%Nb纽扣锭底部出现的是胞状层片共晶组织......
developed[7-13]. Furthermore, a biodegradable Mg stent was used in clinical experiments, which demonstrated the feasibility of Mg based vascular stents[14]. However, the high corrosion rate of Mg alloys...-Zn-Zr alloys. In this study, Mg-Zn-Zr based composites reinforced with different contents of β-TCP were successfully synthesized, and the influence of β-TCP on the microstructure and the properties......
of minor Si and Fe to Al-Zn-Mg-Cu-Zr-Cr-Ti-Fe aluminum alloys can form massive dispersion precipitates, which makes severe recrystallization, decreases the mechanical properties, increases Jcorr.... 图1 合金金相组织 Fig. 1 Optical microstructures of alloys 2.2 微观组织 2.2.1 合金微观组织 图2所示为Al-Zn-Mg-Cu-0.16Zr-0.04Ti-0.04Cr- 0.013Si-0.05Fe合金亚晶粒及晶界析出相的TEM图.由图2可知:合金中亚晶粒尺寸较细小,且亚晶界析出相离散,不连续,未......
]. In Mg-Er binary alloys, Mg24Er5 acts as the eutectic phase [23,24]. Therefore, based on the XRD patterns shown in Fig. 2 and in previous literature, the main phase compositions in as-cast Mg-9Er-6Y...Trans. Nonferrous Met. Soc. China 23(2013) 889-895 Microstructure and phase composition of as-cast Mg-9Er-6Y-xZn-0.6Zr alloys Jing-feng WANG1,2, Peng-fei SONG1, Fu-sheng PAN1,2, Xiao-en ZHOU1 1......
取样方式及尺寸示意图 Fig. 2 Schematic diagrams of specimens extracted from rolled alloys (Unit: mm) 2 结果与讨论 2.1 轧制板材宏观形貌和边裂 图3所示为不同轧制工艺下轧制镁板的宏观形貌.由图3可知,在温度为400 ℃,平均应变速率为2.26 s-1下进行轧制(见图3(a)),轧板产生边裂...应用的新进展[J]. 中国材料进展, 2010, 29(8): 37-45. DING Wen-jiang, WU Yu-juan, PENG Li-ming, ZENG Xiao-qin, LIN Dong-liang, CHEN Bin. Research and application development of advanced magnesium alloys [J......
nucleation undercooling of primary Al-phase on refining particles from Al-5.0 wt% Ti-1.0 wt% B in Al-based alloys using DSC[J]. J Alloys Compound, 2009, 477(1/2): 622-627. [16] PENG J H, LI W F, HUANG F L... alloys refined and modified with Ti-B-Sr was investigated by optical microscopy, scanning electron microscopy, energy dispersive spectrometry and differential scanning calorimetry. With the increase......
), reported the formation of nano-crystallites at shear bands of Al-based amorphous alloys (Al90Fe5Gd5, Al90Fe5Ce5 and Al87Ni8.7Y4.3) bent at room temperature. High energy ball milling was also observed to lead to the formation of nano-crystallites in Al-based amorphous alloys[8]. GAO et al[8] observed nano-crystal precipitation in amorphous Al90Fe5Gd5 within vein protrusion on tensile fracture surfaces......