Abstract
Additive manufacturing is a technology that enables the repair and coating of high‐addedvalue
parts. In applications such as hot stamping, the thermal behavior of the material is essential
to ensure the proper operation of the manufactured part. Therefore, the effective thermal diffusivity
of the material needs to be evaluated. In the present work, the thermal diffusivity of laser‐deposited
AISI H13 is measured experimentally using flash and lock‐in thermography. Because of the fast
cooling rate that characterizes the additive process and the associated grain refinement, the effective
thermal diffusivity of the laser‐deposited AISI H13 is approximately 15% lower than the reference
value of the cast AISI H13. Despite the directional nature of the process, the laser‐deposited
material’s thermal diffusivity behavior is found to be isotropic. The paper also presents a case study
that illustrates the impact of considering the effective thermal conductivity of the deposited material
on the hot stamping process.