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| 1 | 镁合金搅拌摩擦焊接的研究现状与展望显示文摘近年来,镁合金在汽车、轨道交通、航空航天等领域的应用需求快速增长,其可靠连接的重要性愈发突出。作为固相焊接技术,搅拌摩擦焊(FSW)对镁合金焊接具有独特优势,因此得到了广泛关注。本文重点综述了镁合金常规对接FSW的研究进展,就焊接工艺、微观组织演化、织构分布特征、接头力学性能及其之间的相互作用机制进行了详细分析与评述。研究表明,不同于铝合金,在变形镁合金FSW时,织构是影响接头性能的关键因素,焊后形成的特殊强织构分布是导致接头难以达到与母材同等强度的主要原因。同时,对其它焊接形式如搭接焊、点焊、双面焊的可焊性及接头性能的影响因素与变化规律进行了讨论,并对镁合金与其它镁合金、铝合金以及钢之间异种焊的可焊性、界面结合机制、接头性能的影响因素及调控方法进行了评述。最后,对镁合金FSW的未来研究方向进行了展望。 | 马宗义 商乔 倪丁瑞 肖伯律 | 2018 | 金属学报2018，54，11： | 22 |
| 2 | Effect of Yttrium Addition on Microstructural Characteristics and Superplastic Behavior of Friction Stir Processed ZK60 Alloy显示文摘As-extruded ZK60 and ZK60-Y magnesium alloy plates were successfully processed via friction stir processing(FSP) at a tool rotation rate of 1600 r/min and a traverse speed of 200 mm/min. FSP resulted in the formation of equiaxed recrystallized microstructures with the average grain sizes of w8.5 and w4.7 mm in the ZK60 and ZK60-Y alloys, respectively. Moreover, FSP broke and dispersed the MgZn2 and W-phase(Mg3 Zn3 Y2) particles and dissolved MgZn2 phase in the FSP ZK60 alloy. With the addition of rare earth element yttrium(Y) into the ZK60 alloy, the ratio of the high angle grain boundaries(HAGBs) in the FSP alloys increased from 64% to 90%, and a certain amount of twins appeared in the FSP ZK60-Y alloy. The maximum elongation of 1200% and optimum strain rate of 3 103s1achieved at 450 C in the FSP ZK60-Y alloy were substantially higher than those of the FSP ZK60 alloy. This is attributed to the fine grains with high ratio of HAGBs and the distribution of a large number of dispersed second phase particles with high thermal stability in the FSP ZK60-Y alloy. Grain boundary sliding was identified as the primary deformation mechanism in the FSP ZK60 and ZK60-Y alloys from the superplastic data analyses and surficial morphology observations. | Z.A.Luo G.M.Xie Z.Y.Ma G.L.Wang G.D.Wang | 2013 | Journal of Materials Science & Technology2013，29，12： | 9 |
| 3 | 纯铜作中间层的镁合金与不锈钢扩散-钎焊接头区的微观结构特征(英文)显示文摘以纯铜作中间层采用一种新型的两步式扩散-钎焊方法对AZ31镁合金和304L奥氏体不锈钢进行连接。304L与铜的固态扩散连接在850℃下进行20min,随后与镁合金在520℃和495℃进行不同时间的钎焊。对扩散-钎焊接头区的微观结构特征进行研究。在铜与304L钢之间形成没有缺陷存在的Fe-Cu扩散界面。在AZ31和铜之间形成Cu-Mg反应物。在接头处出现包含AZ31/Cu-Mg化合物/Cu/Fe-Cu扩散层/304L的层状结构。随着时间的延长,铜层的宽度降低,而Cu-Mg化合物层的宽度增加。形成的Mg-Cu化合物使AZ31和铜层之间的区域出现显微硬度的峰值。 | 袁新建 盛光敏 罗军 李佳 | 2013 | Transactions of Nonferrous Metals Society of China2013，23，3： | 6 |
| 4 | 稀土元素对镁合金力学行为影响的研究现状(英文)显示文摘系统论述了不同稀土元素的结构特性,基于镁合金的强化机制,并结合当前稀土镁合金的研究现状,展示了稀土元素的添加对镁合金在强度、塑性及抗蠕变性能等方面带来的变化,尤其是对镁合金塑性的影响。其中,区别于传统的强化机制,对添加稀土元素后出现的LPSO结构相对镁合金性能的影响也进行了重点讨论,进一步对镁合金中的稀土元素合金化后的改性作用及前景进行了探讨和展望。 | 李小强 马国俊 殷俊 刘文宁 | 2017 | 材料导报2017，31，21： | 6 |
| 5 | Effects of Y on mechanical properties and damping capacity of ZK60 magnesium alloys显示文摘The microstructure,mechanical properties and damping capacity of ZK60-xY(x=0,1.5%,2.5%,4.0%,mass fraction) magnesium alloys were investigated by using the optical microscope(OM),X-ray diffractometer(XRD),universal tensile testing machine and dynamic mechanical analyzer(DMA).The mechanisms for damping capacity of referred alloys were discussed by Granato-Lücke theory.The results show that Y additions remarkably reduce grain size(the average grain size is 21.6,13.0,8.6 and 4.0μm,respectively),and the tensile properties are enhanced with grain refining(the yield tensile strength increases to 292 MPa from 210 MPa and ultimate tensile strength increases to 330 MPa from 315 MPa).For the ZK60-xY(x=0,1.5%,4.0%)alloys,the damping capacity decreases with the increase of Y content.However,for the ZK60-xY(x=2.5%)alloy,the damping capacity improves abnormally,which is possibly related to the formation of Mg3Y2Zn3(W)FCC phase in this alloy. | 王敬丰 高珊 赵亮 梁浩 胡耀波 潘复生 | 2010 | Transactions of Nonferrous Metals Society of China2010，20，B07： | 1 |
| 6 | Achieving Large-area Bulk Ultrafine Grained Cu via Submerged Multiple-pass Friction Stir Processing显示文摘 | | 2013 | Journal of Materials Science & Technology2013，29，12： | 1 |
| 7 | Mg-Al-Zn合金搅拌摩擦焊接头在同轴压缩过程中的组织演变规律显示文摘为了探究Mg-Al-Zn合金搅拌摩擦焊接头在变形过程中的失效规律,利用万能试验机系统研究了接头在同轴压缩过程中的应力-应变行为及微观组织演变规律。结果表明,Mg-Al-Zn合金接头不同区域在变形过程中会出现不均匀的凹凸现象,这主要由于在搅拌摩擦焊周期性的搅拌作用下接头形成不同的微区织构,从而造成接头中心和边部表现出不同的塑性变形能力。压缩过程中主要的塑性变形量发生在焊核区,并伴随大量孪晶的出现,随着变形量从3%增加到9%,孪生现象先增强后减缓,孪生的区域也不断变大。EBSD结果分析表明Mg-Al-Zn合金搅拌摩擦焊接头在压缩过程中产生的孪晶类型包括{1012}拉伸孪晶(86°)和{1011}压缩孪晶(56°),拉伸孪晶在协调接头塑性变形起主导作用。 | 郑建军 李亚杰 | 2021 | 热加工工艺2021，50，23： | 0 |
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