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alloy; La; absorptivity 镁合金具有低密度,高比强度,较低的刚性和较大的冲击吸收功等独特优点,广泛应用于电子,汽车及航空航天等领域中[1...有报道,但有关稀土元素在Mg基合金熔体中的吸收率及其影响因素方面的研究,至今都未见详细报道.因稀土元素活泼的化学反应特点[7],在目前的熔炼,精炼工艺中难以实现,因此有关后者的La吸收率研究的报道极少.另外,稀土元素在镁合金中将形成化合物[6?8],但究竟是何种化合物使镁合金形成强韧化组织还没有明确的报道.这在某种程度上影响了镁合金在汽车零部件中的开发,应用与发展. 本研究是稀土元素在镁合金工程......
Nanocrystalline Mg and Mg alloy powders by hydriding-dehydriding processing WANG Xin(王 辛), WANG Heng(王 珩), HU Lian-xi(胡连喜), WANG Er-de(王尔德) School of Materials Science and Engineering, Harbin... nanocrystalline Mg and Mg alloy powders using pure Mg and Mg-5.5%Zn-0.6%Zr (mass fraction) (ZK60 Mg) alloy as the starting materal. The hydriding was achieved by room-temperature reaction milling......
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 corrosion product of the Mg-0.8%In (mass fraction) and Mg-0.8%Ga-0.3%In alloy were determined by X-ray diffraction. The results show that no second phase exists in the Mg-xIn (x=0-0.8%) allloys. Intergranular compounds containing Ga and In elements occur in the Mg-0.8%In-xGa (x=0-0.8%) alloys. The addition of In into Mg as well as the addition of 0.05%-0.5%Ga into Mg-In alloy promotes......
Microstructural evolution during solution treatment of thixoformed AM60B Mg alloy HUANG Hai-jun, CHEN Ti-jun , MA Ying, HAO Yuan Key Laboratory of Gansu Advanced Non-ferrous Metal Materials... during solution treatment of AM60B Mg alloy prepared by thixoforming. The results indicate that the microstructural evolution includes two stages: the first stage involves rapid dissolution of eutectic......
Mg的吸/脱氢反应路径同样可以显著降低吸/脱氢反应焓,如添加Si使MgH2脱氢生成Mg2Si,对应的脱氢反应焓为36.4 kJ/mol.然而化合物Mg2Si过于稳定,难以氢化分解成Mg和Si,导致体系的可逆性差,可逆储氢量损失严重[7].Mg和LiBH4等储氢材料复合,体系的脱氢反应焓降低,但体系的可逆性同样有待提高[16]. 最近,通过添加合金元素形成镁的固溶体调节吸/脱氢反应焓受到了广泛的关注...;Microstructure and phase distribution of Mg0.9In0.1 alloy at different states and EDS analysis results 图4所示为Mg0.9In0.1合金不同状态下的微观形貌,相分布和能谱分析结果.图4(a)所示为球磨50 h后的背散射像,只有一种相衬度.据此可推断In已经固溶到Mg晶格中形成了Mg(In)固溶体,这与前面的XRD谱分......
, the grain size of the extruded composites decreases, the strength and elastic modulus increase but the elongation decreases. Key words: extrusion; Mg matrix composites; SiCp; AZ91 magnesium alloy... Trans. Nonferrous Met. Soc. China 22(2012) 1912-1917 Hot extrusion of SiCp/AZ91 Mg matrix composites WANG Xiao-jun, HU Xiao-shi, NIE Kai-bo, WU Kun, ZHENG Ming-yi School of Materials Science......
of experimental Mg alloy (mass fraction, %) 铸轧镁合金板材温热拉深成形实验在THP200液锻机上进行,液锻机为200 t.采用刚性压边装置对压边力进行调整.镁合金板料加热方式为内部加热,即将板料放入凹模中随模加热到设定的成形温度.凹模埋有环形电热环,用于模具加热,电热环采用控温仪控温,测温用热电偶点接触测量,冲头采用随模加热方式,模具结构及电加热系统设置如图1所示...温度较低时(170 ℃)(见图8(a)),合金晶粒沿拉深方向伸长,晶粒呈现长条形,有较多的孪晶和少量的动态再结晶晶粒在晶界和"三叉点"处出现；在195 ℃成形时,在 图7 铸轧AZ31B镁合金在不同温度下的LDR Fig.7 LDR of TRC AZ31B Mg alloy at various temperatures 大晶粒周围出现了越来越多的细小等轴晶,变......
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al. Effects of rare earths on corrosion behavior of AZ91 Mg alloy[J]. The Chinese Journal of Nonferrous Metals, 2021, 31(7): 1798-1808. DOI: 10.11817/j.ysxb.1004.0609.2021-39759 镁合金因其密度低,比强度以及比模量高等优良特...(La, Ce)混合稀土对β相的碎化作用不及稀土Y的作用明显,仍然有较多的骨骼状β相分布在晶界上. 表1 镁合金中主要合金元素的含量 Table 1 Chemical composition of Mg alloy 图1 添加不同稀土前后镁合金的显微组织 Fig. 1 Microstructures of Mg alloy before......
