Hardening of Metals in a Magnetic Field

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    MR. E. G. HERBERT, of Manchester, contributed a paper to the Royal Society in January 1931 and two articles to Metallurgia in May and June of last year on the hardening of metals in a magnetic field. The Royal Society paper describes the fluctuations in the hardness of steel, duralumin, and brass caused by rotation in a magnetic field. Mr. Herbert shows that the time element is an important factor in the hardening produced magnetically. He has found that the hardness changes are sometimes very rapid, and in hard steel, freshly treated, changes may sometimes be observed from minute to minute.

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    Hardening of Metals in a Magnetic Field. Nature 129, 31–32 (1932) doi:10.1038/129031b0

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