Plasticity analysis with Isothermal hardening + melting capability

[alexlq]

Hello,

I’m working with a thermo-mechanical simulation of the laser powder bed fusion of metal. I’ve been analysing the plastic deformation considering Isotropic Hardening coupling the capability of melting temperature. However, I found a perturbation that I cannot solve. The moment when it appeared is approximately during the latent heat of fusion temperatures. Has someone had the same problem and solve it?

Thank you.