Research group Materials Engineerung of Additive Manufacturing


Marie Luise  Köhler © Copyright: IWM


Marie Luise Köhler

Research group Manager Materials Engineering of Additive Manufacturing


+49 241 80 99245



The working group Hardmetal and MMC deals with the process simulation of cemented carbides during their production and service life. Material models are developed by IWM using parameters that are determined experimentally. Consolidated by liquid phase sintering, hard metals are exposed to the build-up of high residual stresses between the different phases (WC/Co), while they cool from sintering temperature to ambient temperature. The FE model developed by IWM is capable of predicting the development of internal stresses as well as the final residual stress state in hard metal microstructure.

Another research focus is the investigation of new manufacturing processes for hard metals and their starting materials. Current topics are the high-temperature carburization of tungsten and the additive manufacturing of WC-Co carbide using laser beam melting (LPBF). The sintering of hard metals can be carried out in a vacuum furnace, a Sinter-HIP as well as by field assisted sintering technique. (SPS/FAST).

Running projects:


Fabrication of Press Hardening Tools by Laser Powder Bed Fusion

Development of new high-speed steels for additive manufacturing by LPBF

Karbidadditivierung von PBF-LB Werkzeugstahl mittels funktioneller Polymerbinder

Carbide additivation of PBF-LB tool steels with functional polymer binders

Influence of the initial porosity on the hot isostatic pressing of components manufactured with additives

Completed projects:

Configuration of specific component properties by processing AM powder mixtures