Authors: M K Kim J Namkung Y S Ahn
Publish Date: 2008/05/01
Volume: 43, Issue: 9, Pages: 3112-3117
Abstract
An alloying element of 0–15 wt Si was added to an Fe–42Ni system and alloy strips were fabricated using a melt drag casting process The effects of the Si and annealing treatments on the thermal expansion properties of Fe–42Ni alloy were investigated The addition of Si enlarged the coexisting temperature region of the solid–liquid phase and reduced the melting point which improved the formability of the alloy strip An alloy containing 06 wt Si had a lower thermal expansion coefficient than any other alloy in the temperature range from 20 to 350 °C The grain size increased with the rolling reduction ratio and annealing temperature which caused an increase in magnetostriction and consequently a decrease in the thermal expansion coefficient of the strip The alloy strip containing 15 wt Si had a higher thermal expansion coefficient than the alloy containing 06 wt Si because of grain refining caused by the precipitation of Ni3Fe
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