DOI: 10.5281/zenodo.7767663
title: Tailoring magnetic hysteresis of Fe-Ni additive manufactured permalloy via multiphysics-multiscale simulations: Temperature-dependent parameters, thermodynamic database, results, and utilities

description: This dataset contains temperature-dependent parameters and thermodynamic database, supplementary data and utilities of the publication "Tailoring magnetic hysteresis of additive manufactured Fe-Ni permalloy via multiphysics-multiscale simulations of process-property relationships" (Yang et al., 2023).

We performed non-isothermal phase-field simulations of SLS process of the Fe21.5Ni78.5 permalloy and subsequential mesoscopic thermo-elasto-plastic calculations and nanoscopic chemical order-disorder (\(\gamma/\gamma'\)) transition simulations as well as micromagnetic hysteresis calculations on nanostructures. Temperature-dependent parameters are employed. We then investigate the dependence of the fusion zone size, the residual stress and plastic strain, and the magnetic hysteresis of AM-produced Fe21.5Ni78.5 on beam power and scan speed.

This dataset contains:



feni_cac.tdb: Thermodynamic database of the Fe-Ni binary system based on Cacciamani et al., 2010

average_values.csv: Average quantities for creating the contours in Fig. 6a, 6b, 7a, 7b, 8a, and Supp. Fig. 10a, 10b.

mesostructures.zip: Containing resampled mesostructures from SLS single scan simulations (final timestep) with associated temperature, stress, and strain evolution. Nodal values are explained in Table 1. Naming pattern is



SLS-TEP__<power>-<scan_speed>__.e



parameters.zip: Containing temperature-dependent parameters for performing SLS simulations and thermo-elasto-plastic calculations with fine (1K) temperature increments. The same temperature-dependent parameters with coarse temperature increments are already listed as Supp. Table 1, 2.

sampled_point_data.zip: Containing mechanical quantities on sampled points and corresponding results of nanoscopic \(\gamma'\) phase fraction (\(\Psi_{\gamma'}\)) and magnetic coercivity \(H_\mathrm{c}\). Naming pattern is



mech__<power>-<scan_speed>__.csv

Psi__<power>-<scan_speed>__.csv

Hc__<power>-<scan_speed>__.csv



utilities.zip: Containing Python utilities to perform calculations of free energy density and related thermodynamic quantities, extracting parameters from feni_cac.tdb. Notice: pyCALPHAD (ver 0.8.4) is requested for performing the Python utilities.


Table 1. Nodal values in an exodus file  Nodal value name Symbol Meaning Unit T \(T\) Normalized Temperature by \(T_\mathrm{M}\) - c \(\rho\) Substance order parameter - pb \(\xi\) Fusion zone indicator - eps (eps_11, eps_12, eps_13, eps_22, eps_23, eps_33) \({\varepsilon}\) Strain - epsp (epsp_11, epsp_12, epsp_13, epsp_22, epsp_23, epsp_33) \({\varepsilon}_\mathrm{pl}\) Plastic Strain - peeq \(p_\mathrm{e}\) Accumulated plastic strain - sigma (sigma_11, sigma_12, sigma_13, sigma_22, sigma_23, sigma_33) \({\sigma}\) Stress MPa vonmises \(\sigma_\mathrm{e}\) von Mises stress MPa u (u_X, u_Y, u_Z) \(\mathbf{u}\) Displacement μm

 

Notice: The raw transient outputs are not cured in this dataset due to the vast file size. Please contact the authors to acquire related files/utilities.