Additive Manufacturing of CoCrFeMnNi High-Entropy Alloy/AISI 316L Stainless Steel Bimetallic Structures
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In: Advanced engineering materials, Vol. 25.2023, No. 7, 2200341, 27.04.2022.
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TY - JOUR
T1 - Additive Manufacturing of CoCrFeMnNi High-Entropy Alloy/AISI 316L Stainless Steel Bimetallic Structures
AU - Sokkalingam, Rathinavelu
AU - Chao, Zhao
AU - Sivaprasad, Katakam
AU - Muthupandi, Veerappan
AU - Jayaraj, Jayamani
AU - Ramasamy, Parthiban
AU - Eckert, Jürgen
AU - Prashanth, Konda Gokuldoss
N1 - Publisher Copyright: © 2022 Wiley-VCH GmbH.
PY - 2022/4/27
Y1 - 2022/4/27
N2 - CoCrFeMnNi high-entropy alloy (HEA)/AISI 316L stainless steel bimetals were additively fabricated using selective laser melting (SLM). The bimetal structure comprises three regions, i.e., CoCrFeMnNi-HEA, AISI 316L stainless steel, and an interface between CoCrFeMnNi-HEA, AISI 316L stainless steel. SLM processing results in the formation of columnar grains extending over many built layers epitaxially in a preferential growth direction. The Vickers microhardness ranges mainly between 250 and 275 HV0.5 in all three observed regions. In addition, only a marginal variation in tensile strength is observed between the CoCrFeMnNi-HEA, AISI 316L stainless steel, and the CoCrFeMnNi-HEA/AISI 316L stainless steel bimetal. The unique higher work hardening behavior of the CoCrFeMnNi-HEA prevents failure along the CoCrFeMnNi-HEA side in the bimetallic structure during plastic deformation. The CoCrFeMnNi-HEA shows higher pitting susceptibility than the AISI 316L stainless steel in the bimetallic structure due to its lower pitting potential. Further, the presence of pores and lack of fusion spots further decreases the pitting resistance of the CoCrFeMnNi-HEA. Hence, the bimetal is prone to more preferential corrosion attack along the CoCrFeMnNi-HEA side due to its anodic behavior and defects.
AB - CoCrFeMnNi high-entropy alloy (HEA)/AISI 316L stainless steel bimetals were additively fabricated using selective laser melting (SLM). The bimetal structure comprises three regions, i.e., CoCrFeMnNi-HEA, AISI 316L stainless steel, and an interface between CoCrFeMnNi-HEA, AISI 316L stainless steel. SLM processing results in the formation of columnar grains extending over many built layers epitaxially in a preferential growth direction. The Vickers microhardness ranges mainly between 250 and 275 HV0.5 in all three observed regions. In addition, only a marginal variation in tensile strength is observed between the CoCrFeMnNi-HEA, AISI 316L stainless steel, and the CoCrFeMnNi-HEA/AISI 316L stainless steel bimetal. The unique higher work hardening behavior of the CoCrFeMnNi-HEA prevents failure along the CoCrFeMnNi-HEA side in the bimetallic structure during plastic deformation. The CoCrFeMnNi-HEA shows higher pitting susceptibility than the AISI 316L stainless steel in the bimetallic structure due to its lower pitting potential. Further, the presence of pores and lack of fusion spots further decreases the pitting resistance of the CoCrFeMnNi-HEA. Hence, the bimetal is prone to more preferential corrosion attack along the CoCrFeMnNi-HEA side due to its anodic behavior and defects.
KW - additive manufacturing
KW - AISI 316L stainless steel
KW - CoCrFeMnNi-high entropy alloys
KW - electron microscopy
KW - tensile and corrosion behavior
UR - http://www.scopus.com/inward/record.url?scp=85133038808&partnerID=8YFLogxK
U2 - 10.1002/adem.202200341
DO - 10.1002/adem.202200341
M3 - Article
AN - SCOPUS:85133038808
VL - 25.2023
JO - Advanced engineering materials
JF - Advanced engineering materials
SN - 1438-1656
IS - 7
M1 - 2200341
ER -
