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| 1 | Effect of heat treatment on LPSO morphology and mechanical properties of Mg-Zn-Y-Gd alloys显示文摘The mechanical properties and microstructure were investigated under different Zn content and heat treatment conditions in a Mg-Zn-YGd cast alloy.A part of the long period stacking order(LPSO)phases transformed to W-M^ZnaRE?phases with an increase in Zn content from 0.9 at.%to 1.8 at.%,and the ultimate tensile strength(UTS)increased from 229 MPa to 248 MPa.With solution treatment at 480°C,the content of the LPSO phase and strength sharply decreased in the Mg-1.8Zn-0.8Y-0.8Gd alloy,whereas this change was not significantly observed in the Mg-0.9Zn-O.8Y-O.8Gd alloy.After solution treatment,the elongation significantly improved and the UTS sharply decreased in both alloys.The lamellar and filminess LPSO phases were observed with aging treatment at 200℃.Moreover,the strengthening efficiency of lamellar and filminess LPSO phases was lower than that of the block LPSO phases.Therefore,the UTS of the T6 state was lower than that of the as-cast alloy. | Hongxin Liao Jonghyun Kim Taekyung Lee Jiangfeng Song Jian Peng Bin Jiang Fusheng Pan | 2020 | Journal of Magnesium and Alloys2020，8，4： | 14 |
| 2 | 长周期有序堆垛相(LPSO)的研究现状及在镁合金中的作用显示文摘镁合金由于具有较高的比强度、比刚度以及良好的成形性和切屑加工性等优点,在航空航天、交通以及电子产品等领域获得了广泛的应用。但是由于镁合金的绝对强度较低,使其在结构件的应用上受到了一定的限制。近年来,采用稀土元素来提高镁合金的强度已成为镁合金研究领域的热点,尤其是Mg-Zn-Y镁合金。由于m(Y)/m(Zn)比的变化,Mg-Zn-Y中的强化相也逐渐产生变化,当m(Y)/m(Zn)>1时,在Mg-Zn-Y合金中出现与镁合金基体完全共格、但富含Y、Zn元素的结构及化学成分均有序的长周期堆垛有序相(LPSO)。相比于其他第二相,LPSO相具有高硬度、良好的热稳定性、良好的阻尼性能、高抗蠕变性能、高弹性模量等特点,因此,这种新型结构强化相在镁合金中对其力学性能的影响引起了研究人员的广泛关注,成为目前镁合金强韧化的研究热点。近几年的研究多是通过快速凝固粉末冶金、铜模铸造、溶体甩带等不同的铸造方法制备出含LPSO相的镁合金,并通过改变溶质原子种类、含量及比例的方法来探究LPSO相对镁合金性能的影响,之后通过热处理、挤压和轧制等加工工艺对LPSO相的数量、尺寸和分布进行调控,进而提高镁合金的性能。而有关LPSO相的微观结构,如LPSO相结构中各原子的排列方式和具体位置等,通过第一性原理计算模拟、选区电子衍射(SADP)、高分辨率透射(HRTEM)及高角环形暗场像扫描电子显微镜(HAADF-STEM)等方法进行研究,已经建立了一个比较完善的LPSO相结构模型。同时,近几年对镁合金凝固和变形过程LPSO相结构中原子的运动研究也有了突破性的进展。在21世纪初,有研究人员通过快速凝固和热挤压的方法制备出的Mg97Zn1Y2(原子分数)合金的屈服强度和延伸率分别达到了610 MPa和5%,这些优异的力学性能归因于纳米级的LPSO相。本文综述了镁合金中LPSO相的形成机制、类型及其含LPSO相的合金体系,并对LPSO相的结构堆垛有序和化学成分有序进行了详尽的叙述,同时分析了LPSO相提高镁合金强度、塑性、抗蠕变性及高阻尼性能的机理;阐述了含LPSO相镁合金的制备工艺对其性能产生的影响;最后对含LPSO相镁合金的发展方向进行了展望。 | 李响 毛萍莉 王峰 王志 刘正 周乐 | 2019 | 材料导报2019，33，7： | 12 |
| 3 | Significantly improved corrosion resistance of Mg-15Gd-2Zn-0.39Zr alloys: Effect of heat-treatment显示文摘The effects of heat-treatment on corrosion behavior of Mg-15Gd-2Zn-0.39Zr alloys were investigated through microstructure characterization, corrosion tests, and scanning Kelvin probe force microscope(SKPFM) analysis. In long-term corrosion experiments, the corrosion rates of Mg-Gd-Zn-Zr alloys were mainly determined by the effects of micro-galvanic corrosion. During heat-treatment, the β-(Mg,Zn)3Gd eutectic phase in as-cast alloys transformed into a long-period stacking ordered(LPSO) phase, coupled with the precipitation of small precipitates. As heat-treatment proceeded, the local potential and the volume fraction of the LPSO phases reduced gradually compared with the eutectic phase, which resulted in a remarkable decrease of the micro-galvanic effect between the second phase and Mg matrix. As a result, the corrosion resistance of heat-treated alloys improved significantly. | Jing Liu Lixin Yang Chunyan Zhang Bo Zhang Tao Zhang Yang Li Kaiming Wu Fuhui Wang | 2019 | Journal of Materials Science & Technology2019，35，8： | 8 |
| 4 | Effect of microstructure evolution on mechanical property of extruded Mg-12Gd-2Er-1Zn-0.6Zr alloys显示文摘The microstructure evolution of as-cast,as-extruded and peak-aged Mg-12Gd-2Er-1Zn-0.6Zr alloys were investigated by Optical Microscope(OM),X-ray Diffraction(XRD),Scanning Electron Microscope(SEM)and Transmission Electron Microscope(TEM).The mechanical performance was also tested by tensile test at room temperature in the present study.The results indicated that the lamellar 14H-LPSO structure formed during the solid solution process at 793 K for 24 h,and also existed after hot extrusion process.The dynamic recrystallization(DRX)occurred during hot extrusion.The DRXed fine grain size was∼5μm.Meanwhile,some un-DRXed grains contained LPSO structure had a roughly orientation along the extrusion direction.The tensile test result showed that the as-extruded alloy had a better elongation of 14%due to fine DRXed grain and fiber-like un-DRXed with LPSO structure attributed to the high elongation.Because of the precipitation of theβ′-phase,the ultimate tensile strength(UTS)and yield tensile strength(YTS)increased up to 415 MPa(UTS)and 374 MPa(YTS),respectively. | Kai Wen Ke Liu Zhaohui Wang Shubo Li Wenbo Du | 2015 | Journal of Magnesium and Alloys2015，3，1： | 7 |
| 5 | A 12R long-period stacking-ordered structure in a Mg-Ni-Y alloy显示文摘A hitherto unreported long-period stacking-ordered(LPSO) phase, designated 12 R, was observed in a Mg_(80)Ni_5Y_(15)(at.%) alloy. Microstructure was investigated by electron diffraction and high-angle annular dark-field scanning transmission electron microscopy. Results show that the 12 R has a trigonal lattice(a = b = 1.112 nm, c = 3.126 nm, α = β = 90°, and γ = 120°). Unit cell of the 12 R is consisted of three ABCAtype building blocks and each building block contains dominant Ni_6 Y_8-type building clusters. A sound structural model is proposed based on relative positions of Ni_6 Y_8 clusters in neighboring building blocks. | Cheng Liu Yuman Zhu Qun Luo Bin Liu Qinfen Gu Qian Li | 2018 | Journal of Materials Science & Technology2018，34，12： | 7 |
| 6 | Mg-11Y-5Gd-2Zn-0.5Zr(wt.%)合金的显微组织和力学性能显示文摘采用光学显微镜(OM)、带能谱分析(EDAX)的扫描电子显微镜(SEM)、X射线衍射仪(XRD)等方法对Mg-11Y-5Gd-2Zn-0.5Zr(WGZ115)合金的原始铸态(F态)、固溶处理态(T4态)和峰值时效态(T6态)的组织结构进行了分析。研究表明:F态WGZ115合金主要由基体(-αMg)、晶间共晶相(Mg24(YGdZn)5)和长周期结构相(Mg12Y1Zn1)组成。T4态WGZ115合金主要由基体相(-αMg)、长周期结构相(Mg12Y1Zn1)和少量分布于晶界附近的方块相(Mg-Y-Gd方块相)组成。T6态WGZ115合金的形貌与T4态相似,圆形的富Zr相始终存在于三种状态的合金中。通过不同温度下的拉伸实验发现T4态WGZ115合金的抗拉强度和塑性好于F态合金。而T6态合金的力学性能最好,在200℃时抗拉强度达到最大值341.1MPa。 | 陈长江 王渠东 尹冬弟 丁文江 | 2009 | 材料科学与工程学报2009，27，6： | 7 |
| 7 | Zn含量对Mg-Gd-Zn合金显微组织与力学性能的影响显示文摘研究了3种成分的Mg-11Gd-(1,1.5,2)Zn合金的显微组织和力学性能。结果表明,合金的铸态显微组织均由α-Mg基体、(Mg,Zn)3Gd共晶相和14H型LPSO相组成。铸态组织中(Mg,Zn)3Gd相的体积分数随Zn含量的增加而增大,且其热稳定性不断提高。同时,合金中LPSO相的体积分数也随Zn含量的增加而逐渐增大。合金在常温时的抗拉强度随着Zn含量的增加而降低,其中Zn含量较少的Mg-11Gd-1Zn合金在T6处理后呈现最高的强度和良好的塑性。当Zn含量较多时,合金T6处理的效果却远低于T5处理。随Zn含量的增加,合金在200℃高温下的抗蠕变性能也略有下降,但3种合金的抗蠕变性能都优于WE54合金。 | 孟姣 薛烽 孙晶晶 白晶 | 2015 | 稀有金属材料与工程2015，44，10： | 6 |
| 8 | The effect of LPSO on the deformation mechanism of Mg-Gd-Y-Zn-Zr magnesium alloy显示文摘The tensile deformation behavior and corresponding microstructure evolution of the Mg-4.7Gd-3.4Y-1.2Zn-0.5Zr(at.%)magnesium alloy with long period stacking structure(LPSO)are studied by electron backscatter diffraction(EBSD)and slip lines methods.The results show that less and very small size of twins is observed in the grains with high value of Schmid factor for twinning,which indicates that the growth of the{10–12}twinning deformation is prevented by the LPSO phase.The prismatic lines present in grains of which the prismatic slip Schmid factor is above 0.4.The favorable orientation and LPSO phase synergistically promote the activation of prismatic slip.The inhomogeneous rotation of the grains during deformation is the reason for the microcrack at grain boundary. | Jianbo Shao Zhiyong Chen Tao Chen Zhang Hu Xiaojie Zhou Chuming Liu | 2016 | Journal of Magnesium and Alloys2016，4，2： | 6 |
| 9 | Ultrahigh strength Mg-Y-Ni alloys obtained by regulating second phases显示文摘Mg-Y-Ni alloys with different second phases were designed by changing Y/Ni atomic ratio from 1.5 to 0.5.The microstructure and mechanical properties of as-cast and as-extruded alloys were investigated.The as-cast Mg-Y-Ni alloy with Y/Ni ratio of 1.5 is composed ofα-Mg and long period stacking ordered(LPSO)phase.When Y/Ni ratio is equal to 1,nanoscale lamellarγ’phase and eutectic Mg2Ni phase are formed in addition to LPSO phase.As Y/Ni ratio decreases further,the amount of eutectic Mg2Ni phase increases,while the amount of LPSO phase decreases.After extrusion,the LPSO andγ’phases are distributed along the extrusion direction,while eutectic Mg2Ni phase is broken and dispersed in the as-extruded alloys.LPSO phase and Mg2Ni phase in the alloys promote dynamic recrystallization(DRX)during extrusion,whileγ’phase inhibits DRX.Consequently,the Mg96Y2Ni2(at.%)alloy with LPSO phase andγ’phase as the main second phases shows the strongest basal texture after extrusion.The tensile yield strength of the as-extruded Mg-Y-Ni alloys increases first and then decreases with decreasing Y/Ni ratio.The as-extruded Mg96Y2Ni2(at.%)alloy with Y/Ni=1 exhibits excellent mechanical properties with tensile yield strength of 465 MPa,ultimate tensile strength of 510 MPa and elongation to failure of 7.2%,which is attributed to the synergistic effect of bulk LPSO phase and nanoscaleγ’phase. | S.Z.Wu X.G.Qiao M.Y.Zheng | 2020 | Journal of Materials Science & Technology2020，42，10： | 4 |
| 10 | Effect of Ni on the microstructure, mechanical properties and corrosion behavior of MgGd_1Ni_(x) alloys for fracturing ball applications显示文摘The effects of Ni addition on the mechanical properties, corrosion behaviors, and corrosion mechanism of Mg Gd_1 Ni_(x) alloys have been investigated by compressive tests, weight loss, hydrogen evolution, and scanning electron microscopy. The results show that the constitution of the second phase is large dependence on Ni/Gd molar ratios, which can transform from LPSO(long-period stacking ordered)+Mg_5 Gd,LPSO to eutectic phase. In addition, with increasing Ni/Gd molar ratios, the content of second phase increases gradually, while the LPSO phase shows a parabola relationship. Furthermore, the formation of Nicontaining LPSO phase not only can improve the strength but also accelerate the degradation of Mg alloys owing to the galvanic corrosion. The optimal properties with ultimate compressive strength, degradation rate are 340 MPa, 2066 mm/y for Mg Gd1 Ni0.75, respectively, which can meet the engineering application standard of fracturing ball and can be used as candidate materials for fracturing ball. | Kai Ma Shijie Liu Chaoneng Dai Xiuying Liu Jie Ren Yuanlang Pan Yinhong Peng Chen Su Jingfeng Wang Fusheng Pan | 2021 | Journal of Materials Science & Technology2021，，32： | 4 |
| 11 | 冷却方式对均匀化态Mg-6Gd-3Y-1Zn-0.5Zr镁合金显微组织及腐蚀性能影响研究显示文摘通过XRD和扫描电镜对不同冷却方式(水淬、随炉冷)均匀化处理的Mg-6Gd-3Y-1Zn-0.5Zr镁合金的显微组织进行观察,并通过质量损失试验和电化学试验研究水淬及随炉冷样品在质量分数为5%Na Cl溶液中的腐蚀性能。结果表明:水淬样品主要由α-Mg固溶体和晶界上的块状长周期结构(LPSO)组成,而随炉冷样品除α-Mg固溶体和晶界上的块状LPSO外,晶内还分布着大量的片层状LPSO;晶内片层状的LPSO增加阴极相的数量,加速镁基体的腐蚀,故随炉冷样品在5%Na Cl水溶液中的质量损失速度大于水淬样品。 | 鲁礼菊 许诗源 刘木君 | 2017 | 兵器材料科学与工程2017，40，2： | 4 |
| 12 | Modification of Mn on corrosion and mechanical behavior of biodegradable Mg(88)Y4Zn2Li5 alloy with long-period stacking ordered structure显示文摘The biological corrosion behavior and mechanical properties of Mg(89-x)Y4 Zn2 Li5 Mnx(x=0,0.5,1,1.5 and2 at.%) alloy with long-period stacking ordered(LPSO) structure were investigated in this work.The magnesium matrix and the eutectic phase of Mg(88)Y4 Zn2 Li5 Mn1 alloy are effectively refined by the grain boundary segregation of Mn,and the average size of matrix and the eutectic phase decreased by 66%and 74%,respectively.The ultimate tensile strength(UTS) and elongation enhanced by 36% and 55%,respectively.The corrosion rates obtained by weight loss and hydrogen evolution of Mg(88)Y4 Zn2 Li5 Mn1 alloy were 79% and 84% lower than that of Mg(88)Y4 Zn2 Li5 alloy.Additionally,Mg(88)Y4 Zn2 Li5 Mn1 alloy also presents superior corrosion behavior in electrochemical test.It is verified that Mn plays a positive role in both corrosion and mechanical properties of the Mg(88)Y4 Zn2 Li5 Mn1 alloy,which provides a reference for further experimental work. | Jiaxin Zhang Jinshan Zhang Fuyin Han Wei Liu Longlong Zhang Rui Zhao Chunxiang Xu Jing Dou | 2020 | Journal of Materials Science & Technology2020，42，7： | 4 |
| 13 | Effect of ZRB 2-modified on microstructure and mechanical properties of Mg-Zn-Y-Mn alloy显示文摘The ZrB 2 particles firstly modified Mg_(94)Zn_(2.5)Y_(2.5)Mn 1 alloy.And the microstructures and mechanical performances of the modified alloys were studied systematically.The results showed that the moderate addition of ZrB 2 accelerated the development of long-period stacking ordered(LPSO)structure and refined the grain size.The grains in ZrB 2-modified alloys were nearly equiaxed with a homogeneous size.When 0.0075 wt%ZrB 2 was added,the as-cast alloy with the finest grains(24.87μm)presented desirable mechanical properties(especially ductility)with maximum tensile strength and ductility of 225 MPa and 17.5%,respectively. | Zhe Zhang Yatong Zhang Jinshan Zhang Yi Li Yanbin Ma Chunxiang Xu | 2018 | Journal of Magnesium and Alloys2018，6，3： | 4 |
| 14 | 喷射沉积含Nd镁合金挤压坯中第二相孪生与LPSO结构相形成显示文摘采用喷射沉积技术制备Mg-9Al-3Zn-1Mn-9Ca-1Nd合金沉积坯,对其进行挤压预变形(挤压温度为340℃,挤压比为25:1)。利用SEM、TEM和XRD研究镁合金第二相孪生、Mg-Nd-Zn型LPSO结构相的形成以及LPSO结构相与第二相孪生之间的关系。结果表明:在Al2(Ca,Nd)型C15相上形成了6H-LPSO结构相,C15粒子周围应力高度集中使分切应力提高且C15粒子周围形成的位错缠结区是C15粒子发生孪生的主要原因;纳米级C15粒子钉扎位错、抑制再结晶晶粒长大是(0002)基面织构及柱面(1010)和锥面(1011)织构形成的主要原因;当平均尺寸较小的纳米级C15粒子内Nd含量较高时C15粒子易形成LPSO结构相,而平均尺寸较大的微米级C15粒子内Nd含量较低时C15粒子易发生孪生。 | 李振亮 岳松波 刘飞 李欣 段宝玉 | 2019 | 稀有金属材料与工程2019，48，11： | 3 |
| 15 | Ca和Al对Mg-Gd-Zn合金中的LPSO相及力学性能的影响显示文摘通过普通重力铸造方法熔炼制备了Mg96.5Gd2.5Zn1、Mg96Gd2.5Zn1Ca0.5和Mg95Gd2.5Zn1Ca0.5Al1(at%,下同)3种合金,考察了合金元素Ca与Al对铸态Mg-Gd-Zn合金中长周期堆垛有序结构相(LPSO)相形成的影响及经固溶热处理和热挤压后微观组织的演变及力学性能变化。结果表明,少量Ca添加到铸态Mg96.5Gd2.5Zn1合金中促进W相偏聚长大、结成网状,经固溶处理炉冷后形成粗大14H-LPSO胞结构和弥散分布于胞内的块状18R相,经挤压后形成长纤维状,显著提高了合金的强度和塑性。铸态Mg95Gd2.5Zn1Ca0.5Al1合金由等轴状a-Mg晶粒及分布于晶界的大量网状18RLPSO相、少量网状共晶Al2Gd相组成;经固溶处理后,网状18R相因部分分解转变为14H而形成取向随机、离散分布的条状18R相;其在挤压变形过程中促进14H、a-Mg晶粒发生显著动态再结晶而导致Mg95Gd2.5Zn1Ca0.5Al1合金相比于Mg96Gd2.5Zn1Ca0.5强度略低、塑性略高。 | 曾航航 边丽萍 赵元亮 杨璠 万骞 梁伟 赵兴国 | 2019 | 稀有金属材料与工程2019，48，6： | 3 |
| 16 | Ni含量对长周期堆垛结构增强Mg-Ni-Y合金组织与性能的影响显示文摘采用传统重力铸造制备Mg-Ni-Y合金并研究了Ni含量对合金显微组织和力学性能的影响。结果表明,Mg-0.5Ni-3.5Y合金组织由α-Mg和Mg24Y5两相组成;Mg-1.2Ni-3.5Y合金中Mg24Y5相消失,形成了层片状长周期堆垛有序(LPSO)相;Mg-1.9Ni-3.5Y和Mg-3.5Ni-3.5Y合金中除含有α-Mg和LPSO相外,在晶界处还存在共晶组织。LPSO相可以提高合金的强度,具有大量细小致密层片状LPSO相的Mg-1.2Ni-3.5Y合金综合力学性能最优,铸态抗拉强度及伸长率可分别达到210 MPa和8.8%。 | 郝良彦 杨雄 吕书林 方晓刚 吴树森 | 2016 | 特种铸造及有色合金2016，36，12： | 3 |
| 17 | 一类支持向量机中引导式量子粒子群优化机理及实现显示文摘通过分析量子粒子群在一类超球面支持向量机训练优化的应用机理,提出一种基于引导式量子粒子群(D-QDPSO)的一类超球面支持向量机训练优化算法,根据Zoutendijk最速下行策略确定全局最优gbest的优化方向,计算引导粒子位置;同时在初始化时根据序列最小优化算法(SMO)得到靠近最优解的近似位置,并以约束平面边界点作为初始化粒子,扩大了搜索范围。实验表明,D-QDPSO算法有较好的收敛性能和泛化性能,其误识率比SMO降低约0.12%,运算速度比LPSO提高2倍左右。 | 姚富光 钟先信 | 2011 | 重庆大学学报(自然科学版)2011，34，2： | 3 |
| 18 | 镁合金中LPSO相的应用研究进展显示文摘Mg-RE-Zn合金体系由于其特殊的相结构而具有优越的力学性能,其较好的耐热和抗腐蚀性以及一定的电磁屏蔽性能引起了金属行业的广泛关注。含有的LPSO相由于特殊的构造吸引了相关领域的研究。综述了当前国内外研究LPSO相的最新进展,介绍了LPSO相在提高合金性能方面的应用以及定向凝固中不同取向LPSO相的变形机制。 | 徐志超 史庆南 冯中学 | 2015 | 热加工工艺2015，44，18： | 3 |
| 19 | Effects of Pb on microstructure, mechanical properties and corrosion resistance of as-cast Mg97Zn1Y2 alloys显示文摘In this present work, Pb was applied in the Mg97Zn1Y2 alloy to improve its microstructure and properties, using conventional casting methods. The microstructure and properties of the Mg97 Zn1 Y2 alloy and Mg97Zn1Y2-x Pb(x=0.6 wt.%, 1.2 wt.% and 1.8 wt.%) alloys were observed by optical microscopy, scanning electron microscopy method and analyzed by X-ray diffraction, hardness and strength measurement and electrochemical testing. After adding Pb to the Mg97Zn1Y2 alloy, a new particle phase Mg_2 Pb was identified along the grain boundaries, and dendrites were refined. In addtion, the hardness of Mg97Zn1Y2-xPb(x=0.6 wt.%, 1.2 wt.% and 1.8 wt.%) alloys was higher than that of the Mg97 Zn1Y2 alloy; with the increase of Pb content, the hardness of the alloy increased first and then decreased, followed by a final slight increase, and reached a maximum of 89.1 HV when the Pb content was 0.6 wt.%. The strength of the alloy increased first and then decreased as the Pb content increased. Moreover, adding a small amount of Pb to the alloy can effectively inhibit corrosion, and Mg97Zn1Y2-0.6 wt.%Pb exhibits the best corrosion resistance ability. | Di-qing Wan Ying-lin Hu Shu-ting Ye Hou-bin Wang Shao-min Wei | 2018 | China Foundry2018，15，6： | 2 |
| 20 | Influence of heat treatment on microstructure and mechanical properties of Mg-10Gd-3Y-1.2Zn-0.4Zr alloy显示文摘Microstructure evolution and mechanical properties of the cast Mg-10Gd-3Y-1.2Zn-0.4Zr(mass fraction,%) alloy during annealing at 798 K for different time were investigated.In the as-cast state,the microstructure consists ofα-Mg,Mg_5(Gd,Y,Zn) eutectic compounds and stacking faults(SF) of basal plane distributed from grain boundary to inner grain.During heat treatment at 798 K,the SF and parts of eutectic compounds dissolve into the matrix gradually,simultaneously,a new straight lamellar phase with 14H type of long period stacking ordered(LPSO) structure comes into being.Microstructure observation indicates that the lamellar phase is transformed from the un-dissolved eutectic compounds and shows a coarsening and disappearing process with annealing time prolonging.Three alloy specimens with typical microstructure after being annealed for 6,36 and 72 h were selected to age at 498 K to peak hardness.Room and elevated temperature tensile tests show that the LPSO structured phase contributes to the change of high temperature tensile properties. | 李德江 曾小勤 董杰 翟春泉 | 2008 | 中国有色金属学会会刊:英文版2008，18，A01： | 2 |
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