%0 conference paper
%@ 
%A Odermatt, A.,Kashaev, N.

%D 2021
%J Lasers in Manufacturing 2021
%N 
%P  

%T Evaluation of steady state via thermography during laser-directed energy deposition with wire
%U 
 
%X Additive manufacturing of structures in a single continuous deposition process is appealing because defects at the start- and end-points,of a track can be avoided. For the evaluation of process stability, a steady state process needs to be reached. A methodology for the,determination of the interpass temperature for processes using a positioner for movement of the work piece has been developed. This,methodology was applied to a laser- and wire-based directed energy deposition process. The approach of the steady state process can,be described by an exponential growth law. From the interpass temperature, a cooling rate can be calculated. The evolution of the,interpass temperature can be used for process control and the cooling rate can be related to material properties. A comparison with,results from the literature shows that the convergence rate is mainly dependent on the power level of the energy source and the size of,the structure