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体温度达到共晶温度时,发生共晶转变.而在共晶转变过程中处于晶界的CNTs作为共晶相α-Mg的形核基底优先使共晶α-Mg长大,从而造成晶界处离异共晶形成. 图3 AZ31镁合金和CNTs/AZ31复合材料的铸态金相组织 Fig.3 As-cast metallographs of AZ31 Mg alloy and CNTs /AZ31 composites...分碳纳米管分布在晶界处的离异共晶β-Al12Mg17相和二次β-Al12Mg17相中,对晶界和晶粒之间起相互搭接和强化作用. 图4 AZ31镁合金及AZ31-1.0%CNTs复合材料的XRD谱 Fig.4 XRD patterns of AZ31 Mg alloy (a) and AZ31- 1.0%CNTs composites (b) 当碳纳米管加入量过多时......
in following annealing. Key words: AZ31 magnesium alloy; hot-rolling; deformation mechanism; texture 镁合金具有密度低,比强度和比刚度高以及优良的阻尼性能,同时具有尺寸稳定性好,机械加工性及电磁屏蔽性能优异等特点,被誉为是21世纪重要的 绿色轻质结构材料[1-2].镁合金板材是应用范围最为广泛的镁合金初级产品之一... of AZ31 magnesium alloy[J]. The Chinese Journal of Nonferrous Metals, 2010, 20(3): 371-377. [4] 赵 虎, 李培杰, 何良菊. AZ31镁合金铸轧和常规轧制板的变形组织及形变特[J]. 中国有色金属学报, 2009, 19(11): 1887-1893.ZHAO Hu, LI Pei-jie, HE......
fraction in the polycrystalline. Key words: AZ31 Mg alloy; twinning deformation; heterogeneous deformation; polycrystalline texture; orientation deflection 在常温下,由于镁的HCP晶体结构具有弱对称性以及活动滑移系数量不足从而造成强烈的塑性各向...向名义应变也是20%.在上述条件下进行计算,可分析单调拉伸与压缩的应力应变响应及屈服强度的不对称性. 图3 镁合金轧制板初始织构 Fig. 3 Initial textures of AZ31 Mg alloy sheet 3.2 挤压棒与轧制板成形模拟的材料初始取向与边界条件 挤压棒与轧制板是常见的变形镁合金材料.对挤压棒的成形过程,可采用等双轴压缩近似模拟......
-containing Mg-Zn-Zr alloy[J]. Mater Sci Eng A, 2007, 462: 334-338. [4] 杨续跃, 孙争艳. 强变形AZ31镁合金的静态再结晶[J]. 中国有色金属学报, 2009, 19(8): 1366-1371.YANG Xu-yue, SUN Zheng-yan. Static recrystallization of magnesium alloy... MPa,247 MPa和18.1%.含Nd合金的抗拉强度和屈服强度随温度升高而下降,而伸长率随温度的升高而增加. 关键词:镁合金；AZ31合金；挤压；微观组织；力学性能 中图分类号:TG146.2 文献标志码:A Behavior and effect of Nd in as-extruded AZ31 magnesium alloy......
Improvement of corrosion resistance of AZ31 Mg alloy by anodizing with co-precipitation of cerium oxide Salah Abdelghany SALMAN, Ryoichi ICHINO, Masazumi OKIDO Department of Material...; Abstract: Anodizing of AZ31 Mg alloy in NaOH solution by co-precipitation......
蚀性能最好,而AZ31合金在MgCl2溶液中耐蚀性能最差,在MgSO4和Mg(COOCH3)2中具有较好的耐蚀性能.电化学阻抗谱(EIS)结果表明:在4种电解液中,镁合金的高频端容抗环半径均随着电解质浓度的增加而减小,这与恒温浸泡的实验结果相吻合. 关键词:AZ31合金；NZ30K合金；腐蚀行为；电化学性能 中图分类号:O646.6 文献标志... performance of NZ30K alloy of as-cast(F) and solution-treatment conditions(T4), and AZ31 alloy of as-extruded condition were investigated in MgCl2, MgSO4, Mg(COOCH3)2 and MgBr2 solution with different......
of extruded AZ31 magnesium alloy (mass fraction, %) 图1 型材横截面形状和取样位置 Fig.1 Cross-section of profile(a) and specimen location(b) (mm) 2 结果与分析 2.1 微观组织分析 AZ31镁合金型材弯曲成形前后横截面外侧的微观组织如... cross-section of AZ31 magnesium alloy profile: (a) Before bending; (b) After bending 2.2 XRD分析 AZ31镁合金型材弯曲成形前后横截面外侧的XRD谱如图3所示.由图3(a)可知,弯曲成形前,型材横截面外侧中晶面的衍射峰强度最高,其次为晶面的,(0002)晶面的衍射峰强度最弱.弯曲成形后,型材横截面......
铝合金/镁合金搅拌摩擦焊接界面处Mg/Al反应及接头力学性能王东1,刘杰2,肖伯律1,马宗义2(1.辽宁省沈阳市科学院金属研究所沈阳材料科学国家(联合)实验室2.中航工业 黎明公司)摘 要:采用搅拌针置中(M4A4),向镁合金侧偏置2 mm(M6A2)和向铝合金侧偏置2 mm(A6M2)3种焊接方式,研究了6 mm厚6061-T651铝合金和AZ31镁合金轧制板材的搅拌摩擦焊接.SEM及XRD分析表明,3种焊接方式均在焊接界面处发现Mg17Al12相的生成和由于共晶相熔化和随后冷却所形成的孔洞.在M4A4和M6A2样品中,少量的Al搅入到镁合金侧形成金属间化合物Mg17Al12,而在A6M2样品中,少量的Mg搅入到铝合金中也形成金属间化合物Mg17Al12,在Mg17Al12与基体的界面处存在微小孔洞.由......
the microstructure of normal twin-roll cast magnesium alloy plate [9-10]. The sheet of AZ31 magnesium alloy produced by normal twin-roll casting consists of α-Mg, interdendritic Mg17Al12 eutectic and some.... Fig. 7 Area scanning of elements in twin-roll cast AZ31 magnesium alloy: (a) SEM image; (b) Mg; (c) Al; (d) Zn; (e) Mn; (f) Si Fig. 8 Schematic diagram of microstructure at side face along......
properties and refines microstructure of AZ31 magnesium alloy and improves its deformability. Key words: ultrasonic vibration; AZ31 magnesium alloy; microstructure; mechanical properties 镁合金属于典型的高比强度,高比... AZ31镁合金铸锭宏观组织 Fig.2 Macrostructure of AZ31 magnesium alloy 图3所示为AZ31镁合金铸锭微观组织及能谱成分分析(EDS)结果.从图3可见:常规铸造锭坯的平均晶粒粒径为350 μm左右,晶界平直或为弓形.超声铸造锭坯的平均晶粒粒径为140 μm左右,这是因为在超声铸造的过程中熔体的流动使枝晶臂受到冲击进而断裂,使粗大的......
