The influence of mg-based inclusions on the grain boundary mobility of austenite in ss400 steel

Chih Ting Lai, Hsuan Hao Lai, Yen Hao Frank Su, Fei Ya Huang, Chi Kang Lin, Jui Chao Kuo, Hwa Teng Lee

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

In this study, the effects of the addition of Mg to the grain growth of austenite and the magnesium-based inclusions to mobility were investigated in SS400 steel at high temperatures. A high-temperature confocal scanning laser microscope (HT-CSLM) was employed to directly observe, in situ, the grain structure of austenite under 25 torr Ar at high temperatures. The grain size distribution of austenite showed the log-normal distribution. The results of the grain growth curves using 3D surface fitting showed that the n and Q values of the growth equation parameters ranged from 0.2 to 0.26 and from 405 kJ/mole to 752 kJ/mole, respectively, when adding 5.6-22 ppm of Mg. Increasing the temperature from 1150 to 1250 ° C for 20 min and increasing the addition of Mg by 5.6, 11, and 22 ppm resulted in increases in the grain boundary velocity. The effects of solute drag and Zener pinning on grain boundary mobility were also calculated in this study.

原文English
文章編號370
期刊Metals
9
發行號3
DOIs
出版狀態Published - 2019 三月

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)

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