Extension to the Jiles-Atherton Hysteresis Model Using Gaussian Distributed Parameters for Quenched and Tempered...

Area of Science:

• Materials Science
• Condensed Matter Physics
• Electromagnetism

Background:

• The Jiles-Atherton (J-A) model is widely used for ferromagnetic hysteresis due to its efficiency and simplicity.
• However, its applicability to specific engineering steel microstructures requires further investigation.

Purpose of the Study:

• To evaluate the J-A model's accuracy for hysteresis loops in as-quenched and quenched-and-tempered engineering steels.
• To propose modifications to the J-A model for improved representation of experimental data.

Main Methods:

• Experimental measurement of magnetic hysteresis loops for engineering steels.
• Application and analysis of the standard Jiles-Atherton model.
• Modification of J-A model parameters using Gaussian variations with respect to applied magnetic field.

Main Results:

• The standard J-A model fails to accurately capture features like rapid loop narrowing in as-quenched steels and sharp corners in quenched-and-tempered steels.
• Applying Gaussian variations to J-A model parameters significantly improves the fit to experimental major hysteresis loops.
• The enhanced model demonstrates superior performance for engineering steels relevant to the oil and gas industry.

Conclusions:

• The Jiles-Atherton model, in its current form, is insufficient for accurately modeling hysteresis in certain engineering steels.
• Gaussian variations offer a viable method to enhance the J-A model's predictive capabilities for these materials.
• This improved model has practical implications for material characterization in demanding industrial applications.