Inclusion engineering in Co-based duplex entropic alloys

Wei Wang; Yong Wang; Wangzhong Mu; Joo Hyun Park; Hui Kong; Sohei Sukenaga; Hiroyuki Shibata; Henrik Larsson; Huahai Mao

doi:10.1016/j.matdes.2021.110097

Inclusion engineering in Co-based duplex entropic alloys

Wei Wang, Yong Wang, Wangzhong Mu, Joo Hyun Park, Hui Kong, Sohei Sukenaga, Hiroyuki Shibata, Henrik Larsson, Huahai Mao

Division of Process and System Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Co-based duplex entropic alloy is designed very recently to replace pure Co as a major component of the binder phase for cemented carbide cutting tools. This work aims to provide a fundamental study of oxide inclusion characteristics in the duplex fcc + hcp Co-based entropic alloys. It is found that the Co_85−xCr_xFe_7.5Ni_7.5 (x = 15, 30 at.%) alloys hold the highest liquidus (T_liq) and solidus (T_sol) temperatures, compare with the Co_85−xCr_xMn_7.5Ni_7.5 (x = 15, 30 at.%) and Co_77.5−xCr_xFe_7.5Mn_7.5Ni_7.5 (x = 15, 30 at.%) alloys. For each grade, the increasing Cr content leads to a decrease of T_sol and T_liq temperatures. It is also noted that there is an approximate 100 °C of undercooling exists in each grade during the solidification. The stable oxide inclusion in the Co_85−xCr_xMn_7.5Ni_7.5 and Co_77.5−xCr_xFe_7.5Mn_7.5Ni_7.5 alloys is the MnCr₂O₄ type, while Cr₂O₃ is the main stable inclusion in the Co_85−xCr_xFe_7.5Ni_7.5 alloy. Furthermore, the size range of the MnCr₂O₄ particles is larger than that of Cr₂O₃. The theoretical calculation shows that MnCr₂O₄ has a higher coagulation coefficient than Cr₂O₃ does. This is due to the influence of the thermo-physical parameters, i.e. the interfacial energy between the oxide and the alloy and the viscosity of liquid alloy. The theoretical calculation fits well with the experimental findings.

Original language	English
Article number	110097
Journal	Materials and Design
Volume	210
DOIs	https://doi.org/10.1016/j.matdes.2021.110097
Publication status	Published - 2021 Nov 15

Keywords

Agglomeration
Co-based alloys
Duplex entropic alloys
High temperature phase equilibria
Non-metallic inclusion

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matdes.2021.110097

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@article{b326f361d4c1487bbd0394c2d1a81f8d,

title = "Inclusion engineering in Co-based duplex entropic alloys",

abstract = "Co-based duplex entropic alloy is designed very recently to replace pure Co as a major component of the binder phase for cemented carbide cutting tools. This work aims to provide a fundamental study of oxide inclusion characteristics in the duplex fcc + hcp Co-based entropic alloys. It is found that the Co85−xCrxFe7.5Ni7.5 (x = 15, 30 at.%) alloys hold the highest liquidus (Tliq) and solidus (Tsol) temperatures, compare with the Co85−xCrxMn7.5Ni7.5 (x = 15, 30 at.%) and Co77.5−xCrxFe7.5Mn7.5Ni7.5 (x = 15, 30 at.%) alloys. For each grade, the increasing Cr content leads to a decrease of Tsol and Tliq temperatures. It is also noted that there is an approximate 100 °C of undercooling exists in each grade during the solidification. The stable oxide inclusion in the Co85−xCrxMn7.5Ni7.5 and Co77.5−xCrxFe7.5Mn7.5Ni7.5 alloys is the MnCr2O4 type, while Cr2O3 is the main stable inclusion in the Co85−xCrxFe7.5Ni7.5 alloy. Furthermore, the size range of the MnCr2O4 particles is larger than that of Cr2O3. The theoretical calculation shows that MnCr2O4 has a higher coagulation coefficient than Cr2O3 does. This is due to the influence of the thermo-physical parameters, i.e. the interfacial energy between the oxide and the alloy and the viscosity of liquid alloy. The theoretical calculation fits well with the experimental findings.",

keywords = "Agglomeration, Co-based alloys, Duplex entropic alloys, High temperature phase equilibria, Non-metallic inclusion",

author = "Wei Wang and Yong Wang and Wangzhong Mu and Park, {Joo Hyun} and Hui Kong and Sohei Sukenaga and Hiroyuki Shibata and Henrik Larsson and Huahai Mao",

note = "Funding Information: W. Mu would like to acknowledge the Swedish Foundation for International Cooperation in Research and Higher Education (STINT, Project No. PT2017-7330 & IB2020-8781), Swedish iron and steel research office (Jernkontoret) and National Science Foundation of China (NSFC) for financial support of the research and writing the manuscript. W. Wang would like to thank the Key R&D Science and Technology Development Project of Jilin Provincial Science and Technology Department (Grant No. 20200401106GX) for the financial support. Y. Wang would like to acknowledge China Scholarship Council (CSC). H. Kong and W. Mu would like to thank Key Research and Development Plan of Anhui Province (202104b11020007) for the financial support. Publisher Copyright: {\textcopyright} 2021 The Authors",

year = "2021",

month = nov,

day = "15",

doi = "10.1016/j.matdes.2021.110097",

language = "English",

volume = "210",

journal = "International Journal of Materials in Engineering Applications",

issn = "0264-1275",

publisher = "Elsevier BV",

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T1 - Inclusion engineering in Co-based duplex entropic alloys

AU - Wang, Wei

AU - Wang, Yong

AU - Mu, Wangzhong

AU - Park, Joo Hyun

AU - Kong, Hui

AU - Sukenaga, Sohei

AU - Shibata, Hiroyuki

AU - Larsson, Henrik

AU - Mao, Huahai

N1 - Funding Information: W. Mu would like to acknowledge the Swedish Foundation for International Cooperation in Research and Higher Education (STINT, Project No. PT2017-7330 & IB2020-8781), Swedish iron and steel research office (Jernkontoret) and National Science Foundation of China (NSFC) for financial support of the research and writing the manuscript. W. Wang would like to thank the Key R&D Science and Technology Development Project of Jilin Provincial Science and Technology Department (Grant No. 20200401106GX) for the financial support. Y. Wang would like to acknowledge China Scholarship Council (CSC). H. Kong and W. Mu would like to thank Key Research and Development Plan of Anhui Province (202104b11020007) for the financial support. Publisher Copyright: © 2021 The Authors

PY - 2021/11/15

Y1 - 2021/11/15

N2 - Co-based duplex entropic alloy is designed very recently to replace pure Co as a major component of the binder phase for cemented carbide cutting tools. This work aims to provide a fundamental study of oxide inclusion characteristics in the duplex fcc + hcp Co-based entropic alloys. It is found that the Co85−xCrxFe7.5Ni7.5 (x = 15, 30 at.%) alloys hold the highest liquidus (Tliq) and solidus (Tsol) temperatures, compare with the Co85−xCrxMn7.5Ni7.5 (x = 15, 30 at.%) and Co77.5−xCrxFe7.5Mn7.5Ni7.5 (x = 15, 30 at.%) alloys. For each grade, the increasing Cr content leads to a decrease of Tsol and Tliq temperatures. It is also noted that there is an approximate 100 °C of undercooling exists in each grade during the solidification. The stable oxide inclusion in the Co85−xCrxMn7.5Ni7.5 and Co77.5−xCrxFe7.5Mn7.5Ni7.5 alloys is the MnCr2O4 type, while Cr2O3 is the main stable inclusion in the Co85−xCrxFe7.5Ni7.5 alloy. Furthermore, the size range of the MnCr2O4 particles is larger than that of Cr2O3. The theoretical calculation shows that MnCr2O4 has a higher coagulation coefficient than Cr2O3 does. This is due to the influence of the thermo-physical parameters, i.e. the interfacial energy between the oxide and the alloy and the viscosity of liquid alloy. The theoretical calculation fits well with the experimental findings.

AB - Co-based duplex entropic alloy is designed very recently to replace pure Co as a major component of the binder phase for cemented carbide cutting tools. This work aims to provide a fundamental study of oxide inclusion characteristics in the duplex fcc + hcp Co-based entropic alloys. It is found that the Co85−xCrxFe7.5Ni7.5 (x = 15, 30 at.%) alloys hold the highest liquidus (Tliq) and solidus (Tsol) temperatures, compare with the Co85−xCrxMn7.5Ni7.5 (x = 15, 30 at.%) and Co77.5−xCrxFe7.5Mn7.5Ni7.5 (x = 15, 30 at.%) alloys. For each grade, the increasing Cr content leads to a decrease of Tsol and Tliq temperatures. It is also noted that there is an approximate 100 °C of undercooling exists in each grade during the solidification. The stable oxide inclusion in the Co85−xCrxMn7.5Ni7.5 and Co77.5−xCrxFe7.5Mn7.5Ni7.5 alloys is the MnCr2O4 type, while Cr2O3 is the main stable inclusion in the Co85−xCrxFe7.5Ni7.5 alloy. Furthermore, the size range of the MnCr2O4 particles is larger than that of Cr2O3. The theoretical calculation shows that MnCr2O4 has a higher coagulation coefficient than Cr2O3 does. This is due to the influence of the thermo-physical parameters, i.e. the interfacial energy between the oxide and the alloy and the viscosity of liquid alloy. The theoretical calculation fits well with the experimental findings.

KW - Agglomeration

KW - Co-based alloys

KW - Duplex entropic alloys

KW - High temperature phase equilibria

KW - Non-metallic inclusion

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DO - 10.1016/j.matdes.2021.110097

M3 - Article

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VL - 210

JO - International Journal of Materials in Engineering Applications

JF - International Journal of Materials in Engineering Applications

SN - 0264-1275

M1 - 110097

ER -

Inclusion engineering in Co-based duplex entropic alloys

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Keywords

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