Laser-based Powder Bed Fusion of dispersion strengthened CoCrNi by ex-situ addition of TiN
Paper in proceeding, 2022

In this study, metal matrix composites (MMC) of a CoCrNi medium entropy alloy (MEA) reinforced with titanium nitride (TiN) nano-sized particles were designed for production by laser-based powder bed fusion (LB-PBF). Two different additions, 0.5 wt% and 5 wt% of TiN nanosized particles, were mixed with CoCrNi using tumbling and ball milling, respectively. The results suggest that although the powder morphology is not significantly affected by the TiN addition, the processability of CoCrNi-5 wt% TiN is worse than that of CoCrNi and CoCrNi-0.5 wt% TiN. The hardness of CoCrNi, originally 278 HV, is enhanced by addition of 0.5% and 5% TiN to 309 HV and 357 HV respectively. This hardening is mainly due to the presence of reinforcement particles in the matrix. The work presented here shows promising processability of MMC based on MEAs by LB-PBF, as well as the beneficial effect of the reinforcement phase on the mechanical properties of MEAs.

Additive Manufacturing

Titanium nitride

Metal matrix composites

CoCrNi

Medium entropy alloys

Laser-based powder bed fusion

Author

Sri Bala Aditya Malladi

Chalmers, Industrial and Materials Science, Materials and manufacture

Laura Cordova Gonzalez

Chalmers, Industrial and Materials Science, Materials and manufacture

Sheng Guo

Chalmers, Industrial and Materials Science, Materials and manufacture

Lars Nyborg

Chalmers, Industrial and Materials Science, Materials and manufacture

Procedia CIRP

22128271 (eISSN)

Vol. 111 368-372

12th CIRP Conference on Photonic Technologies, LANE 2022
Erlangen, Germany,

Design av nya material och processer för nästa generations additiv tillverkning

VINNOVA (2018-00803), 2018-05-16 -- 2021-05-15.

Additive Manufacturing using Metal Pilot Line (MANUELA)

European Commission (EC) (EC/H2020/820774), 2018-10-01 -- 2022-09-30.

Subject Categories

Ceramics

Materials Chemistry

Metallurgy and Metallic Materials

DOI

10.1016/j.procir.2022.08.168

More information

Latest update

11/28/2022