Domain nucleation and annihilation in a steel bar subjected to an increasing tensile load
Publication in refereed journal

香港中文大學研究人員

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摘要Measurements of magnetoacoustic emission (MAE) and Barkhausen emission (BE) are made on a steel bar under an increasing tensile load. Both MAE and BE profiles possess two peaks. The initial peak is corresponding to domain nucleation while the final peak is due to domain annihilation. The ratios, r(MAE) and r(BE), of the initial peak to the final peak in both MAE and BE profiles are used to indicate the relative strength of the nucleation process to the annihilation one. Initially, the value of r(MAE) is constantly kept at about 1.3 even the applied tensile load is changing. After the bar is yielded, r(MAE) increases up to a value of 1.7. On the other hand, r(BE) is greater than 1 when the bar is in the elastic state; it is about unity when the bar begins to yield; in the plastically deformed state, r(BE) is less than 1. It is therefore possible to estimate the mechanical condition of the steel components when they are under stress by the MAE and BE techniques. We have also conducted the microhardness test and optical microscopy on the steel bar in order to investigate the effect of microstructure on MAE and BE.
著者Ng HT, Yu CC, Ng DHL
會議名稱1996 IEEE International Magnetics Conference (INTERMAG 96)
會議開始日09.04.1996
會議完結日12.04.1996
會議地點SEATTLE
期刊名稱IEEE Transactions on Magnetics
出版年份1996
月份9
日期1
卷號32
期次5
出版社IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
頁次4851 - 4853
國際標準期刊號0018-9464
電子國際標準期刊號1941-0069
語言英式英語
Web of Science 學科類別Engineering; Engineering, Electrical & Electronic; ENGINEERING, ELECTRICAL & ELECTRONIC; Physics; Physics, Applied; PHYSICS, APPLIED

上次更新時間 2021-17-02 於 01:17