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基于同步辐射技术的WE54镁合金原位时效研究曾嘉1,周碧晋21. 东莞中学2. 上海交通大学材料科学与工程学院轻合金精密成型国家工程研究中心摘 要:利用原位同步辐射技术对WE54镁合金时效过程进行研究.通过对比固溶态(T4)和固溶后冷轧预变形(T4-D)两组合金,揭示WE系列合金在300℃时效温度下析出相演变...(TEM)结果分析发现:通过轧制预变形可以加速合金的时效进程并促进形成网状分布的时效析出相,这种分布有利于合金获得良好的时效强化效果.关键词:WE54镁合金;预变形;析出相;同步辐射衍射;时效强化;......
Corrosion behavior of WE54 magnesium alloy in 3.5%NaCl solution LI Zhuo-qun(李卓群), SHAN Da-yong(单大勇), CHEN Rong-shi(陈荣石), KE Wei(柯 伟), HAN En-hou(韩恩厚) Environmental Corrosion Center, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China Received 28 July 2006; accepted 15 September 2006 Abstract: The corrosion behavior of WE54 magnesium alloy was investigated......
Characterization and Prediction of Microporosity Defect in Sand Cast WE54 Alloy CastingsJilin Li,Rongshi Chen,Yuequn Ma,Wei KeState Key Laboratory for Corrosion and Protection,Institute of Metal Research,Chinese Academy of Sciences摘 要:In order to study the effect of Zr modification and riser size on microporosity defect distributions in WE54 alloy sand......
Hot Tearing of Sand Cast Mg-5 wt.% Y-4 wt.% RE (WE54) AlloyJilin LI,Rongshi CHEN,Yuequn MA,Wei KEState Key Laboratory for Corrosion and Protection,Institute of Metal Research,Chinese Academy... is beneficial to the foundry process design.In the present research,a new developed instrumented"CRC"equipment was applied in characterization of hot tearing in sand cast Mg-5 wt.%Y-4 wt.%RE(WE54)alloy......
(x=2, 3, 5)相, 但用热处理的方法几乎不可能消除. 在合金的Cast-T5, Cast-T6, Ext-T5和Ext-T6的4种时效状态中, Ext-T5态达到峰值硬度的时间最短, 峰值硬度值最高; 而Cast-T5态的则相反. 合金具有较高的耐热强度和延伸率, 其在不同温度下的抗拉强度与WE54的相当, 而延伸率明显优于WE54及其它耐热镁合金的. 合金在25℃时的断裂方式以准解理断裂... time is in the Ext-T5 temper, while the lowest hardness in the longest time is in the Cast-T5. The tensile strengths of the alloy at the studied temperatures are as high as that of WE54 alloy......
Mg-9Gd-4Y-0.6Zr合金挤压T5态的高温组织与力学性能 肖 阳, 张新明, 陈健美, 蒋 浩 (中南大学 材料科学与工程学院, 长沙 410083) 摘 要: 研究了Mg-9Gd-4Y-0.6Zr合金挤压T5态在250~400℃之间的高温组织与力学性能. 结果表明: 该合金具有非常优异的高温力学性能, 其力学性能明显优于WE54; 该合金在250... outstanding mechanical properties and high heat-resistance, and its mechanical properties are markedly better than those of WE54. The tensile strength of this alloy at 250, 300, 350 and 400℃ are 348......
are superior to the commercial heat-resistant WE54 alloy, although the latter has a higher rare earth element content. Key words: Mg-Gd-Y-Zr alloy; low temperature thermo-mechanical treatment... and dislocations and promote the precipitation in WE54 alloy [11]. However, technologies especially low temperature TMT (LT-TMT) have not been yet carried out on the prominent age hardenable Mg-Gd-Y(-Zr......
影响. 结果表明: 在铸态, 含Zr合金的晶粒明显小于不含Zr的合金, 而Mn对合金的铸态显微组织影响不大; 将Mg-9%Gd-4%Y-0.6%Mn和Mg-9%Gd-4%Y-0.6%Zr合金挤压后, 都可以得到非常细小均匀的等轴晶, 晶粒尺寸约14μm; 这两个合金在挤压时效态(T5)的力学性能都明显优于WE54合金的, 且Mg-9%Gd-4%Y-0.6%Zr合金比Mg-9%Gd-4%Y-0.6... fine particle about 14μm and uniform grains are obtained. The mechanical properties of the two alloys at the extruded-T5 state are all better than those of the WE54 alloy, and the properties......
Mg-Gd-Y-Mn合金挤压及时效过程中的组织与力学性能 易丹青1,方西亚1,王斌1,张鸿1,罗文海1 (1.中南大学材料科学与工程学院,湖南长沙,410083) 摘要:利用金相显微镜,扫描电镜,透射电镜和Instron材料试验机研究了Mg-9.05Gd-5.11Y-0.43Mn(wt%)合金热挤压及随后200℃等温时效过程中的组织演变与力学性能.结果表明:该合金铸锭晶粒粗大,热挤压发生动态再结晶使合金的晶粒尺寸减小;实验合金在200℃下时效具有明显的时效硬化效果;片状相沿棱柱面的大量析出是产生峰值时效硬化的主要原因,对合金强度提高起了很大的作用;该合金在室温及300℃下的拉伸性能明显优于WE54合金. 关键词:Mg-9.05Gd-5.11Y-0.43Mn合金; 挤压; 等温时效; 显微组织; 力学性能; [全文内容正在添加中] ......
时效硬化Mg-10Y-1.5Sm合金的强度稳定性(英文)张清,陈君,李全安河南科技大学有色金属共性技术河南省协同创新中心摘 要:采用组织分析和拉伸试验,研究了时效硬化Mg-10Y-1.5Sm (质量分数,%)合金抗拉强度的稳定性.结果表明,Mg-10Y-1.5Sm合金的显微组织由α-Mg基体和Mg24Y5相组成,没有发现含Sm相的生成.随着温度从20℃升高到300℃,合金的抗拉强度均高于200 MPa,没有明显变化.合金强度对温度不敏感,变化幅度低于10 MPa.其抗拉强度稳定性优于发展最为成功的商用耐热镁合金WE54,原因可主要归结于因Sm固溶而增强的强化相Mg24Y5硬度的稳定性.关键词:镁合金;稀土;抗拉强度;强化相;......
