Grain size measurement using magnetic and acoustic Barkhausen noise

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1987-04-15
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Ranjan, R.
Buck, Otto
Thompson, R.
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Jiles, David
Distinguished Professor Emeritus
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Ames National Laboratory

Ames National Laboratory is a government-owned, contractor-operated national laboratory of the U.S. Department of Energy (DOE), operated by and located on the campus of Iowa State University in Ames, Iowa.

For more than 70 years, the Ames National Laboratory has successfully partnered with Iowa State University, and is unique among the 17 DOE laboratories in that it is physically located on the campus of a major research university. Many of the scientists and administrators at the Laboratory also hold faculty positions at the University and the Laboratory has access to both undergraduate and graduate student talent.

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Results on annealed nickel show that the total number of counts of both magnetic and acoustic Barkhausen signals vary inversely with grain size. In decarburized steels the total number of counts and the amplitude of both Barkhausen signals increase in proportion to grain size. The paper addresses these results in context of grain size, grain‐boundary segregation, and precipitate effect.

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The following article appeared in Journal of Applied Physics 61, no. 8 (1987): 3199–3201 and may be found at http://dx.doi.org/10.1063/1.338900.

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Thu Jan 01 00:00:00 UTC 1987
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