MICROSTRUCTURE AND PROPERTIES OF THE HEAT TREATED DS Tb--Dy--Fe ALLOY

Acta Metall Sin

2004, Vol. 40

Issue (4): 378-382 DOI:

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MICROSTRUCTURE AND PROPERTIES OF THE HEAT TREATED DS Tb--Dy--Fe ALLOY

JIANG Chengbao; ZHAO Yan; XU Huibin

School of Materials Science and Engineering; Beijing University of Aeronautics and Astronautics; Beijing 100083

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JIANG Chengbao; ZHAO Yan; XU Huibin. MICROSTRUCTURE AND PROPERTIES OF THE HEAT TREATED DS Tb--Dy--Fe ALLOY. Acta Metall Sin, 2004, 40(4): 378-382 .

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Abstract <110> oriented rods of a Tb--Dy--Fe magnetostrictive alloy have been successfully prepared by zone melting unidirectional solidification. A homogenization annealing for 4 or 48 h at 900---1100 C has been carried out in a quartz cylinder under Ar protection after pumping to 2X10 -3 Pa. It was found that, after annealing, <110> preferred orientation is unchanged, the net shape pseudo--eutectic rare earth phase trends discontinuous and spheroidal, magnetostriction slightly decreased without pre--stress but increased obviously with pre--stress. An obvious magnetostriction jump effect was observed in the annealed samples. A satisfactory magnetostrictive property of 1950X10 -6 was obtained under 15 MPa pre--stress after 4 h heat treatment. The compressive stresses of the heat--treated samples decrease monotonously with increasing the soaking time. A satisfactory combination of the magnetostriction and mechanical properties was obtained at annealing for 4 h for the <110> oriented Tb--Dy--Fe alloy.

Key words: Tb--Dy--Fe alloy magnetostriction

Received: 16 April 2003

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2004/V40/I4/378

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