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Materials Science in Additive Manufacturing Inconel 718-CoCrMo bimetallic structures

Sample Inconel 718 CoCrMo Transverse Longitudinal
bimetallic bimetallic
Yield strength 498±34 600±103 408±75 533±65
Figure 4. Stress-strain curves for each compression sample type. Note that only one of each sample type is shown and that the Inconel 718 base sample did
not fail and therefore is only plotted until 0.4 strain.

A B

Figure 5. (A) Failure behavior of the transverse bimetallic sample. Cracking is observed in the CoCrMo part at the bottom right. (B) Failure behavior of
the longitudinal bimetallic sample, in which there is cracking on the CoCrMo side at a 45° angle.

4. Discussion oxidation resistance applications with dynamic conditions.
Furthermore, the microstructural findings of this study
The laser DED process is used to form bimetallic structures are in line with published data where functionally graded
of Inconel 718 to CoCrMo. The results show that the Inconel structures were printed through powder bed fusion (PBF) .
[28]
718 and CoCrMo form a stable interface. This indicates that
using a coating of one or the other could tailor a structure It is essential to discuss what coating should be used for
with specific properties depending on the need, with the what application. Inconel 718 coating on CoCrMo would
CoCrMo coating working better for wear and corrosion work better in environments with dynamic conditions
resistance applications with static conditions and with the in high-temperature environments. This is due to the
Inconel 718 coating working better for high-temperature oxide layer in Inconel 718 being firmly attached, unlike

Volume 1 Issue 3 (2022) 5 https://doi.org/10.18063/msam.v1i3.18