Study on the Morphological Feature and Formative Mechanism of Al-35％La Alloy
we found that the microstructure of Al-35％ La alloy is different from the common microstructure of hypereutectic alloys during the conventional casting process, the first crystalline phase is Al11 La3 , which composition is discontinuous along the growth direction, the mAln dendrite is composed of a-Al alternating with Al11 La3, the results of SEM and XRD show that the chemical composition along the mAln dendrite exhibits periodic behavior, the organizational morphology is also discontinuous along the growth direction in the microstructure of Al-35％ La alloy during the directional solidification process, therefore, this microstructure is named as periodic two-phase dendrite structure. Finally, we discussed the formative mechanism of this microstructure based on the above experiments.
Al-35 La alloy conventional casting directional solidification periodic two-phase dendrite formative mechanism
Zheng Yahong Wang Yanlin Wang Zidong
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 ,China
国际会议
69th World Foundry Congress(第69届世界铸造会议 WFC 2010)
杭州
英文
833-836
2010-10-16（万方平台首次上网日期，不代表论文的发表时间）