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Improved Thermal Stability of Al-Si Alloy Coated Steel Sheet with Cr Thin Film Deposition

Jae-Hyeon Kim Jung-Ha Lee Seung-Beop Lee Sung-Jin Kim Min-Suk Oh

Archives of Metallurgy and Materials | 2024 | vol. 69 | No 1 | 117-121 | DOI: 10.24425/amm.2024.147798

Keywords Aluminized steel physical vapor deposition Cr thin film corrosion resistance thermal stability

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Abstract

We investigated the effect of Cr thin film deposition on the thermal stability and corrosion resistance of hot-dip aluminized steel. A high-quality Cr thin film was deposited on the surface of the Al-9 wt. % Si-coated steel sheets by physical vapor deposition. When the Al-Si coated steel sheets were exposed to a high temperature of 500℃, Fe from the steel substrate diffused into the Al-Si coating layer resulting in discoloration. However, the highly heat-resistant Cr thin film deposited on the Al-Si coating prevented diffusion and surface exposure of Fe, improving the heat and corrosion resistances of the Al-Si alloy coated steel sheet.

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Authors and Affiliations

Jae-Hyeon Kim

Jung-Ha Lee

Seung-Beop Lee

Sung-Jin Kim

e-mail:

ORCID:

Min-Suk Oh

e-mail:

ORCID:

Jeonbuk National University, Division of Advanced Materials Engineering And Research Center For Advanced Materials Development, Jeonju, Republic of Korea
Jeonbuk National University, School of International Engineering And Science, Jeonju, Republic of Korea
Sunchon National University, Department of Advanced Materials Engineering, Sunchon, Republic of Korea

In-Situ Wettability Analysis of Al Coating Influence on Hot-Dip Galvanizing Properties of Advanced High-Strength Steels

Srinivasulu Grandhi Kwang-Hyeok Jin Min-Su Kim Dong-Joo Yoon Seung-Hyo Lee Min-Suk Oh

Archives of Metallurgy and Materials | 2024 | vol. 69 | No 1 | 73-76 | DOI: 10.24425/amm.2024.147788

Keywords Advanced high-strength steel (AHSS) selective oxidation physical vapor deposition (PVD) contact angle wetting

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Abstract

We investigated the influence of steel surface properties on the wettability of zinc (Zn). Our main objective is to address the selective oxidation of solute alloying elements and enhance the wetting behavior of Zn on advanced high strength steel (AHSS) by employing an aluminum (Al) interlayer through the physical vapor deposition technique. The deposition of an Al interlayer resulted in a decrease in contact angle and an increase in spread width as the molten Zn interacted with the Al interlay on the steel substrate. Importantly, the incorporation of an Al interlayer demonstrated a significant improvement in wettability by substantially increasing the work of adhesion compared to the uncoated AHSS substrate.

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Authors and Affiliations

Srinivasulu Grandhi

Kwang-Hyeok Jin

Min-Su Kim

e-mail:

ORCID:

Dong-Joo Yoon

Seung-Hyo Lee

Min-Suk Oh

e-mail:

ORCID:

Jeonbuk National University, Division of Advanced Materials Engineering and Research Center for Advanced Materials Developm ent, Jeonju,Republic of Korea
Sunchon National University, Center for Practical Use of Rare Materials, Sunchon, Republic of Korea
Korea Maritime & Ocean University, Department of Ocean Advanced of Materials Convergence Engineering, Pusan, Republic of Korea
Jeonbuk National University, Division of Advanced Materials Engineering and Research Center for Advanced Materials Developm ent, Jeonju, Republic of Korea

Effect of Atmospheric-Pressure Gas-Plasma Treatment on Surface Properties of Hot-Dip Zn-Mg-Al Alloy-Coated Steel

Chang-U Jeong Jae-Hyeon Kim Je-Shin Park Min-Su Kim Sung-Jin Kim Min-Suk Oh

Archives of Metallurgy and Materials | 2023 | vol. 68 | No 1 | 187-190 | DOI: 10.24425/amm.2023.141492

Keywords plasma treatment Zn-Mg-Al–galvanized steel surface energy process gas

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Abstract

The effect of plasma-radical change on the surface properties of Zn-Mg-Al ternary-alloy-coated steel sheets during atmospheric-pressure (AP) plasma treatment using different process gases: O ₂, N ₂, and compressed air was investigated. The plasma-induced radicals promoted the formation of chemical particles on the surface of the Zn-Mg-Al coating, thereby increasing the surface roughness. The surface energy was calculated using the Owen-Wendtgeometric equation. Contact angle measurements indicated that the surface free energy of the alloy sheets increased upon AP plasma treatment. The surface properties of the Zn-Mg-Al coating changed more significantly in the order air > O ₂ > N ₂ gas, indicating that the plasma radicals facilitated the carbonization and hydroxylation of the Mg and Al components during the AP plasma treatment.

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Authors and Affiliations

Chang-U Jeong

Jae-Hyeon Kim

Je-Shin Park

e-mail:

ORCID:

Min-Su Kim

e-mail:

ORCID:

Sung-Jin Kim

e-mail:

ORCID:

Min-Suk Oh

e-mail:

ORCID:

Jeonbuk National University, Division of Advanced Materials Engineering, Jeonju, Republic of Korea
Korea Institute of Industrial Technology, Gimje, Republic of Korea
Sunchon National University, Department of Advanced Materials Engineering, Sunchon, Republic of Korea

Improvement of Weldability of Hot-Dip Galvanized Steel by Anti-Galvanizing Coating with Si-Fe-Al Oxide-Based Micropowder

Seong-Min So Ki-Yeon Kim Il-Song Park Seok-Jae Lee Dong-Jin Yoo Yeon-Won Kim Min-Suk Oh

Archives of Metallurgy and Materials | 2023 | vol. 68 | No 1 | 155-159

Keywords Hot-dip galvanizing Anti-galvanizing Oxide micropowder weldability

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Abstract

A Si-Fe-Al ternary oxide-based micropowder coating was used to prevent the formation of a Zn coating on steel during the hot-dip Zn galvanizing process to reduce the welding fume and defects generated during the welding of Zn-galvanized steel. The composition ratio of the oxide powder was optimized and its microstructure and weldability were evaluated. The optimized oxide coating was stable in the hot-dip galvanizing bath at 470°C and effectively inhibited the formation of Zn coating. The Zn residue could be easily removed with simple mechanical impact. The proposed coating reduced Zn fume and prevented the residual Zn from melting in the weld bead during high-temperature welding, thus reducing the number of welding defects. The results indicated that this pretreatment can simplify the manufacturing process and shorten the process time cost-effectively.

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Authors and Affiliations

Seong-Min So

Ki-Yeon Kim

Il-Song Park

e-mail:

ORCID:

Seok-Jae Lee

e-mail:

ORCID:

Dong-Jin Yoo

Yeon-Won Kim

e-mail:

ORCID:

Min-Suk Oh

e-mail:

ORCID:

Jeonbuk National University, Division of Advanced Materials Engineering, Jeonju, Republic of Korea
Jeonbuk National University, Department of Energy Storage/Conversion Engineering Of Graduate School, Department of Life Science, Hydrogen and Fuel Cell Research Center, Jeonju, Republic of Korea
Mokpo National Maritime University, Division of Marine Mechatronics, Mokpo, Republic of Korea

Effect of Sintering Holding Time and Cooling Rate on the Austenite Stability and Mechanical Properties of Nanocrystalline FeCrC Alloy

Gwanghun Kim Junhyub Jeon Namhyuk Seo Seunggyu Choi Min-Suk Oh Seung Bae Son Seok-Jae Lee

Archives of Metallurgy and Materials | 2021 | vol. 66 | No 3 | 759-763 | DOI: 10.24425/amm.2021.136376

Keywords Fe-Cr-C alloy Sintering holding time Cooling rate austenite stability Nanocrystalline

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Abstract

The effects of the sintering holding time and cooling rate on the microstructure and mechanical properties of nanocrystalline Fe-Cr-C alloy were investigated. Nanocrystalline Fe-1.5Cr-1C (wt.%) alloy was fabricated by mechanical alloying and spark plasma sintering. Different process conditions were applied to fabricate the sintered samples. The phase fraction and grain size were measured using X-ray powder diffraction and confirmed by electron backscatter diffraction. The stability and volume fraction of the austenite phase, which could affect the mechanical properties of the Fe-based alloy, were calculated using an empirical equation. The sample names consist of a number and a letter, which correspond to the holding time and cooling method, respectively. For the 0A, 0W, 10A, and 10W samples, the volume fraction was measured at 5.56, 44.95, 6.15, and 61.44 vol.%. To evaluate the mechanical properties, the hardness of 0A, 0W, 10A, and 10W samples were measured as 44.6, 63.1, 42.5, and 53.8 HRC. These results show that there is a difference in carbon diffusion and solubility depending on the sintering holding time and cooling rate.

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Bibliography

[1] E . Yajima, T. Miyazaki, T. Sugiyama, H. Terajima, Trans. JIM 15, 173 (1974).
[2] E .C. Santos, K. Kida, T. Honda, J. Rozwadowska, K. Houri, Adv. Mater. Res. 217, 982 (2011).
[3] I . Yoshida, K. Yamamoto, K. Domura, K. Mizobe, K. Kida, Mater. Sci. Forum 867, 55 (2016).
[4] O . Grassel, L. Kruger, G. Frommeyer, L.W. Meyer, Int. J. Plast. 16, 1391 (2000).
[5] G. Frommeyer, U. Brux, P. Neumann, ISIJ Int. 43, 438 (2003).
[6] D.S. Park, S.J. Oh, I.J. Shon, S.J. Lee, Arch. Metall. Mater. 63, 1479 (2018).
[7] S.G. Choi, J.H. Jeon, N.H. Seo, Y.H. Moon, I.J. Shon, S.J. Lee, Arch. Metall. Mater. 65, 1001 (2020).
[8] S.J. Lee, S. Lee, B.C. De Cooman, Scr. Mater. 64, 649 (2011).
[9] Y. Sakuma, O. Matsumura, H. Takechi, Met. Trans. A 22, 489 (1991).
[10] Y. Matsuoka, T. Iwasaki, N. Nakada, T. Tsuchiyama, S. Takaki, ISIJ Int. 53, 1224 (2013).
[11] K. Sugimoto, M. Misu, M. Kobayashi, H. Shirasawa, ISIJ Int. 33, 775 (1993).
[12] S.J. Lee, S. Lee, B.C. De Cooman, Int. J. Mater. Res. 104, 423 (2013).
[13] J.S. Benjamin, T.E. Volin, Met. Trans. 5, 1929 (1974).
[14] S.I. Cha, S.H. Hong, B.K. Kim, Mater. Sci. Eng. A 351, 31 (2003).
[15] H .W. Zhang, R. Gopalan, T. Mukai, K. Hono, Scr. Mater. 53, 863 (2005).
[16] G.K. Williamson, W.H. Hall, Acta Metall. 1, 22 (1953).
[17] B.L. Averbach, M. Cohen, Trans. AIME 176, 401 (1948).
[18] H . Luo, J. Shi, C. Wang, W. Cao, X. Sun, H. Dong, Acta Mater. 59, 4002 (2011).
[19] S.J. Oh, J.H. Jeon, I.J. Shon, S.J. Lee, J. Korean Powder Metall. Inst. 26, 389 (2019).
[20] I . Seki, K. Nagata, ISIJ Int. 45, 1789 (2005).
[21] G. Dini, R. Ueji, A. Najafizadeh, S.M. Monir-Vaghefi, Mater. Sci. Eng. A 527, 2759 (2010).
[22] F. Martin, C. Garcia, Y. Blanco, M.L. Rodriguez-Mendez, Mater. Sci. Eng. A 642, 360 (2015).

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Authors and Affiliations

Gwanghun Kim

e-mail:

ORCID:

Junhyub Jeon

e-mail:

ORCID:

Namhyuk Seo

e-mail:

ORCID:

Seunggyu Choi

Min-Suk Oh

e-mail:

ORCID:

Seung Bae Son

e-mail:

ORCID:

Seok-Jae Lee

e-mail:

ORCID:

Jeonbuk National University, Division of Advanced Materials Engineering, 567 Baekje-daero, Deokjin-gu, Jeonju, 54896, Republic of Korea

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Improved Thermal Stability of Al-Si Alloy Coated Steel Sheet with Cr Thin Film Deposition

Abstract

Authors and Affiliations

In-Situ Wettability Analysis of Al Coating Influence on Hot-Dip Galvanizing Properties of Advanced High-Strength Steels

Abstract

Authors and Affiliations

Effect of Atmospheric-Pressure Gas-Plasma Treatment on Surface Properties of Hot-Dip Zn-Mg-Al Alloy-Coated Steel

Abstract

Authors and Affiliations

Improvement of Weldability of Hot-Dip Galvanized Steel by Anti-Galvanizing Coating with Si-Fe-Al Oxide-Based Micropowder

Abstract

Authors and Affiliations

Effect of Sintering Holding Time and Cooling Rate on the Austenite Stability and Mechanical Properties of Nanocrystalline FeCrC Alloy

Abstract

Bibliography

Authors and Affiliations