日本金属学会誌

J. Japan Inst. Metals, Vol. 18, No. 11 (1954),
pp. 584-588

The Δ E-effect, Young's Modulus, and Their Change Due to Quenching in Iron-Aluminium Alloys

Mikio Yamamoto and Satoshi Taniguchi


Abstract:

Δ E-effects and Young's moduli in annealed and in quenched states of ferromagnetic iron-aluminium alloys containing less then 17 percent aluminium have been measured with the method of magnetostrictive vibration. In the whole composition range a small negative Δ E-effect has been observed at low fields both in annealed and in quenchedstates, and a secondary increase of the Δ E-effect has been found in alloys containing less than 4 percent aluminium. The saturation value of the Δ E-effect in annealed state shows three maxima at about 8, 12, and 14 percent aluminium, of which the second and the third maxima disappear completely by quenching, indicating that the Δ E-effect increase to a greater extent with the superlattice formation of Fe3Al. Young's modulus both in unmagnetized and in magnetically saturated states, shows a deep minimum at about 13 percent aluminium, and the relative increase in Young's modulus in magnetically saturated state due to quenching is found to be only about 2 or 3 percent, indicating that the low value of Young's modulus at about 13 percent aluminium has no direct correlation with the superlattice Fe3Al.


(Received 1954/6/30)

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