Publication Type
Book
Publication Date
Volume
1
Publisher Name
John Wiley & Sons
Publisher Location
Hoboken, New Jersey, United States of America
Abstract
Magnetic fields varying from ambient to 30 tesla were applied during austenite decomposition in
1045 and 52100 steels. Thermal recalescence due to the release of latent heat during austenite
decomposition is observed in temperature measurements and provides an estimate of
transformation temperatures. Microstructural analysis was performed using and electron
microscopy along with microhardness measurements. The shift in transformation temperature
was estimated at 3°C/tesla which corresponds to an apparent free energy shift of 12.6 J/mol/tesla
in 1045 steel. This shift in transformation temperature was accompanied by an increase in ferrite
content. In 52100 steel, the magnetic field altered the transformation product from martensite to
pearlite for a single cooling rate. This result indicates that the transformation mechanism can be
selected by an applied magnetic field for a fixed cooling rate and alloy chemistry.
