Details
| Original language | English |
|---|---|
| Article number | 170343 |
| Journal | Journal of alloys and compounds |
| Volume | 956 |
| Early online date | 29 Apr 2023 |
| Publication status | Published - 15 Sept 2023 |
Abstract
The microstructure and corrosion behavior of two novel biomedical high entropy alloys (HEA)s, namely Hf27Nb12Ta10Ti23Zr28 and Hf30Nb14Ta10Ti28Zr18 that were previously designed utilizing machine learning, were investigated in depth. The microstructure of the alloys was determined to be dendritic, with some elemental segregations governed by the solidification kinetics occurring during the arc-melting process. Static immersion experiments were carried out in artificial saliva (AS) and simulated body fluid (SBF) to investigate the ion release behavior of the HEAs and reveal the dissolution kinetics of the passive film forming on the surface. The composition of the corresponding surface oxide layers was examined using X-ray photoelectron spectroscopy, which provided detailed insight into the stability of passive oxide layers and sub-oxide formation. Potentiodynamic polarization experiments performed in AS and SBF at 37 ºC demonstrated that both HEAs exhibit superior corrosion behavior as compared to the CoCrMo alloy, one of the conventional metallic implant materials of choice.
Keywords
- Corrosion resistance, High-entropy alloys, Microstructure, Passive oxide layer, Polarization
ASJC Scopus subject areas
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
- Materials Science(all)
- Metals and Alloys
- Materials Science(all)
- Materials Chemistry
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In: Journal of alloys and compounds, Vol. 956, 170343, 15.09.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Understanding the enhanced corrosion performance of two novel Ti-based biomedical high entropy alloys
AU - Ozdemir, H. C.
AU - Nazarahari, A.
AU - Yilmaz, B.
AU - Unal, U.
AU - Maier, H. J.
AU - Canadinc, D.
AU - Bedir, E.
AU - Yilmaz, R.
N1 - Funding Information: This project was funded by The Scientific and Technological Research Council of Türkiye (TÜBİTAK) within the 1002a program and grant number 112M945 . The authors thank Dr. Hadi Jahangiri for his help with the XRD measurements, Dr. Gulsu Simsek for her help with the ICP-MS analyses, and Dr. Mustafa Baris Yagci for his assistance with XPS measurements conducted at the Koc University Surface Science and Technology Center (KUYTAM). D. Canadinc acknowledges the support by Alexander von Humboldt Foundation within the scope of the Humboldt Research Award. H.J. Maier acknowledges financial support by Deutsche Forschungsgemeinschaft (project # 426335750 ).
PY - 2023/9/15
Y1 - 2023/9/15
N2 - The microstructure and corrosion behavior of two novel biomedical high entropy alloys (HEA)s, namely Hf27Nb12Ta10Ti23Zr28 and Hf30Nb14Ta10Ti28Zr18 that were previously designed utilizing machine learning, were investigated in depth. The microstructure of the alloys was determined to be dendritic, with some elemental segregations governed by the solidification kinetics occurring during the arc-melting process. Static immersion experiments were carried out in artificial saliva (AS) and simulated body fluid (SBF) to investigate the ion release behavior of the HEAs and reveal the dissolution kinetics of the passive film forming on the surface. The composition of the corresponding surface oxide layers was examined using X-ray photoelectron spectroscopy, which provided detailed insight into the stability of passive oxide layers and sub-oxide formation. Potentiodynamic polarization experiments performed in AS and SBF at 37 ºC demonstrated that both HEAs exhibit superior corrosion behavior as compared to the CoCrMo alloy, one of the conventional metallic implant materials of choice.
AB - The microstructure and corrosion behavior of two novel biomedical high entropy alloys (HEA)s, namely Hf27Nb12Ta10Ti23Zr28 and Hf30Nb14Ta10Ti28Zr18 that were previously designed utilizing machine learning, were investigated in depth. The microstructure of the alloys was determined to be dendritic, with some elemental segregations governed by the solidification kinetics occurring during the arc-melting process. Static immersion experiments were carried out in artificial saliva (AS) and simulated body fluid (SBF) to investigate the ion release behavior of the HEAs and reveal the dissolution kinetics of the passive film forming on the surface. The composition of the corresponding surface oxide layers was examined using X-ray photoelectron spectroscopy, which provided detailed insight into the stability of passive oxide layers and sub-oxide formation. Potentiodynamic polarization experiments performed in AS and SBF at 37 ºC demonstrated that both HEAs exhibit superior corrosion behavior as compared to the CoCrMo alloy, one of the conventional metallic implant materials of choice.
KW - Corrosion resistance
KW - High-entropy alloys
KW - Microstructure
KW - Passive oxide layer
KW - Polarization
UR - http://www.scopus.com/inward/record.url?scp=85156239259&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2023.170343
DO - 10.1016/j.jallcom.2023.170343
M3 - Article
AN - SCOPUS:85156239259
VL - 956
JO - Journal of alloys and compounds
JF - Journal of alloys and compounds
SN - 0925-8388
M1 - 170343
ER -