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. However, an interesting microstructural change in the as-cast Mg-3Sn-2Ca alloy added with 0.5%Ce is observed. After adding 0.5%Ce to Mg-3Sn-2Ca alloy, not only the volume fraction of CaMgSn phase...%Ce to Mg-3Sn-2Ca alloy, the second creep rate of the alloy at 150 ℃ and 70 MPa for 100 h changes from 3.28×10-8 to 1.81×10-8 s-1. Key words: magnesium alloy; Mg-3Sn-2Ca alloy; CaMgSn phase; Ce......
lower than those of the Mg-3Sn-2Ca alloy. Key words: magnesium alloy; CaMgSn phase; Sn; Ca; mechanical properties  ... a stable Mg2Sn compound with Mg, and Ca can improve creep resistance by forming stable Mg2Ca intermetallic particles with Mg[4-5]. In addition, Sn, Ca and Mg can form the CaMgSn phase which has higher......
of α-Mg, Mg2Sn and CaMgSn phases. With the addition of Gd, the formation of the Mg2Sn phase is impeded and the CaMgSn phase is refined, whereas the ultimate tensile strength and elongation decrease... by forming stable CaMgSn phase in the matrix[2-5]. Recently, Mg-3Sn-2Ca alloy has been identified as one of the most promising magnesium alloys, which processes excellent thermal stability[3-7......
凝固冷速与时效时间对CaMgSn形态的影响邱克强,李荣华,王俊杰,杨君宝沈阳工业大学材料科学与工程学院摘 要:针对CaMgSn形貌对Mg-Sn-Ca系合金的力学性能具有重要的影响,研究了慢冷,快冷及时效处理对CaMgSn组织形貌的影响规律.分别采用光学显微镜,扫描电镜,X射线衍射仪和维氏硬度计对比分析了不同处理条件对Mg-3Sn-2Ca-3Cu(质量分数/%)合金微观组织,相结构和硬度的影响.Mg-3Sn-2Ca-3Cu合金慢冷组织主要由α-Mg,CaMgSn,Mg2Ca,CuMg2和Mg2Sn构成,其中CaMgSn为粗大的棒状相;快冷及时效处理后,CaMgSn的形态发生了明显的改变,在时效48 h时,转变为近球状形貌.时效处理后,合金的维氏硬度得到了明显的提高,在时效48 h时达到最高值77.随时效......
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Phase Separation Process at Early Aging Stage of Ni42CrTiAl Jiao shao-yang1,XU Bing-she1,HU lan-qing1,WEI Ying-hui1,HOU Li-feng1 (1.Taiyuan University of Technology, Taiyuan, China) 摘要:Phase... decomposition is500℃. And the solid solution break into the lean and the rich areas, moreover the rich solute areas would have ordering arrangement to form ordering phase. 关键词:alloy; spinodal decomposition......
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any analogue processing to avoid the influence on environment. The method adopted the maximum likelihood estimation (MLE) to acquire phase estimation values, and frequency measurement was realized by phase difference estimation. The wavelet threshold de-noising was introduced to improve the precision of phase estimation. Performance of the method was analyzed and verified by simulation......
PHASE TRANSFORMATION BEHAVIOR IN THE SPUTTERDEPOSITED Ti-Pd-Ni THIN FILMS J.S.Wu1,Q.C.Tian1 (1.Key Laboratory of the Ministry of Education for High Temperature Materials and Tests,School... calorimetry (DSC). It was found that the phase transformation temperatures of Ti50.6Pd30Ni19.4 ingot are much higher than those of its thin film. The B19'' and B19 phases coexisted, together with the Ti2Ni......