Title :
Aging Effects on Magnetic Properties in a 12Cr-W Steel
Author :
Ryu, Kwon-sang ; Lee, Yun-Hee ; Kim, Chung-Seok ; Park, Duck-Gun ; Son, Derac
Author_Institution :
Korea Res. Inst. of Stand. & Sci., Daejeon, South Korea
fDate :
4/1/2012 12:00:00 AM
Abstract :
Changes of magnetic and mechanical properties by high-temperature, isothermal agings were studied in a 12Cr-W steel. Results of coercivity, hysteresis loss, and Vickers hardness obtained from the aged specimen decreased with second order exponential functions of the aging time increased. These phenomena were analyzed using the scanning electron microscope, backscattered electron, and X-ray diffraction; from a microstructural viewpoint, the aging resulted in a coarsening of the tempered carbide (Cr23C6) and a formation of the Laves (Fe2W) phase. These microstructural changes are closely related with a reduction of the mechanical strength with the aging time.
Keywords :
Vickers hardness; X-ray diffraction; ageing; coercive force; crystal microstructure; electron backscattering; high-temperature effects; magnetic hysteresis; magnetic materials; scanning electron microscopy; steel; Laves phase; Vickers hardness; X-ray diffraction; coercivity; electron backscattering; high-temperature effect; hysteresis loss; isothermal aging; magnetic properties; mechanical properties; scanning electron microscopy; second order exponential function; tempered carbide; Aging; Coercive force; Magnetic domains; Magnetic hysteresis; Magnetic properties; Soft magnetic materials; Steel; Coercive force; hysteresis; magnetic domains; magnetic losses; steel;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2173471
