التفاصيل البيبلوغرافية
| العنوان: |
Effects of cooling rate on microstructure and microhardness of directionally solidified Galvalume alloy. |
| المؤلفون: |
Ji-peng Li, De-gao Qiao, Jian Li, Xiao-yang Luo, Peng Peng, Xian-tao Yan, Xu-dong Zhang |
| المصدر: |
China Foundry; May2024, Vol. 21 Issue 3, p213-220, 8p |
| مصطلحات موضوعية: |
MICROHARDNESS, DIRECTIONAL solidification, MICROSTRUCTURE, ALLOYS, DENDRITIC crystals, MELT spinning |
| مستخلص: |
The influences of cooling rate on the phase constitution, microstructural length scale, and microhardness of directionally solidified Galvalume (Zn-55Al-1.6Si) alloy were investigated by directional solidification experiments at different withdrawal speeds (5, 10, 20, 50, 100, 200, and 400 µm·s-1). The results show that the microstructure of directionally solidified Galvalume alloys is composed of primary Al dendrites, Si-rich phase and (Zn-Al-Si) ternary eutectics at the withdrawal speed ranging from 5 to 400 µm·s-1. As the withdrawal speed increases, the segregation of Si element intensifies, resulting in an increase in the area fraction of the Si-rich phase. In addition, the primary Al dendrites show significant refinement with an increase in the withdrawal speed. The relationship between the primary dendrite arm spacing (λ1) and the thermal parameters of solidification is obtained: λ1=127.3V-0.31. Moreover, as the withdrawal speed increases from 5 to 400 µm·s-1, the microhardness of the alloy increases from 90 HV to 151 HV. This is a combined effect of grain refinement and second-phase strengthening. [ABSTRACT FROM AUTHOR] |
|
Copyright of China Foundry is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Find this article in full text from Springer Verlag. 
Full Text Finder