Comparison of Microstructure and Properties of Nickel-Copper Alloy Prepared by Casting and Laser Powder Bed Fusion Process\n

0571160 - ÚFM 2025 RIV CH eng J - Journal Article
Chlupová, Alice - Šulák, Ivo - Kuběna, Ivo - Kruml, Tomáš - Roth, J. - Jahns, K.
Comparison of Microstructure and Properties of Nickel-Copper Alloy Prepared by Casting and Laser Powder Bed Fusion Process
.
Materials Science Forum. Roč. 1082, neuvedeno (2023), s. 171-176. ISSN 0255-5476
EU Projects: European Commission(XE) 857124 - Horizont 2020; European Commission(XE) 958192 - HORIZON 2020
Institutional support: RVO:68081723
Keywords : nickel-copper alloy * microstructure * tensile properties * fractography * casting * laser * powder bed fusion
OECD category: Materials engineering
Method of publishing: Open access
https://www.scientific.net/MSF.1082.171

Nickel-copper alloys are commonly used in highly corrosive conditions where strength is
required. Typical applications are in the marine sector, petrochemical industry, or energy facilities
such as chemical tubes, pumps, heat exchangers and superheated steam systems. This paper compares
the microstructure and mechanical properties of a cast alloy with a 3D printed alloy processed via a
laser powder bed fusion (LPBF) technique. Small cylindrical specimens were used for tensile tests at
room temperature (RT) and elevated temperatures up to 750 °C in air. The tensile stress-strain
response was determined for both types of materials. At RT, LPBF material has a higher yield strength
and ultimate tensile strength than a cast alloy. At elevated temperatures, the strength of both variants
is comparable. However, the fracture elongation of the LPBF material is significantly lower over the
entire range of investigated temperatures. Fracture surfaces and polished sections parallel to the
specimen axis were investigated to compare the microstructure and damage mechanisms of the
nickel-coper alloy 400 prepared by conventional casting and via LPBF.
Permanent Link: https://hdl.handle.net/11104/0342455