Study on the Formation of Reaction Phase to Si Addition in Boron Steel Hot-Dipped in Al–7Ni Alloy

Yun, Jung Gil; Lee, Jaehyung; Kwak, Sung Yun; Kang, Chung Yun

doi:10.3390/coatings7110186

Cited by 10 publications

(10 citation statements)

References 18 publications

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“…Reason for this is the high electron affinity of Si towards Fe. Similar results were evident in other studies (Yun et al, 2017). Intermetallic formed due to variation in thickness and composition.…”

Section: Sem and Edx Micrographssupporting

confidence: 91%

Nano-mechanical properties of novel intermetallic coatings on 316L bioimplant material

2019

Biomater Tissue Eng Bull

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In the present work, Nano-mechanical properties of intermetallic layer formed on 316L austenitic stainless steel have been investigated. Hot dip aluminizing technique applied on stainless steel samples for coating and composition of Al-Si alloys maintained as 8%, 10%, 12% and 14%. Nano-mechanical properties of the Intermetallic formed have been evaluated using Nano-indentation technique at room temp.era.tu.re and results were compared. On the basis of our observations and obtained results it is concluded that with increasing silicon percentage the thickness of the intermetallic layer increases. Howev.er, the Na.no-mechanical results showed that this layer is brittle in nature. Therefore, it can be inferred th.at for bio-implant application the thickness of the lay.er needs to be at lower level as possible.

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Section: Sem and Edx Micrographssupporting

confidence: 91%

Nano-mechanical properties of novel intermetallic coatings on 316L bioimplant material

2019

Biomater Tissue Eng Bull

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“…They claim that the silicon has inhibitory effects on the intermetallic growth in the steel-coating interface and that it neutralizes the Al 13 Fe 4 phase formation and it promotes a growth of Al 8 Fe 2 Si. Their results are consistent with Windmann's work and confirm the work of Yun et al [14]. Eggeler et al [15] proved that silicon occupies free positions in the Al 5 Fe 2 grid and thus prevents the growth of this phase.…”

Section: No /supporting

confidence: 89%

THE CHARACTERISTICS OF Al-Si COATING ON STEEL 22MnB5 DEPENDING ON THE HEAT TREATMENT

Kolaříková

Chotěborský²,

Hromasová

et al. 2019

Acta Polytech

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The coating on the 22MnB5 steel is intended to protect it against oxidation during the forming process. This steel is hot-pressed. A preheating before the pressing and subsequent hardening in the tool affects the properties of the AlSi coating. This study summarizes the results of investigating the effect of heat treatment parameters on the formation of intermetallics in the AlSi coating. The chemical analysis of the coating was performed by the EDX and EBSD method and the mechanical properties were determined by the Hysitron TI 950 TriboIndenter™ system. The result of this study is that, due to a diffusion during the heat treatment, the brittle coating was transformed into a tougher phase.

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“…The ζ phase was not observed because it is smaller than the β phase. According to a previous study on a steel coated with Al alloy through the hot dipping process [26][27][28][29], the κ (Fe 3 AlC) phase was formed because Al atoms in liquid Al and C atoms emitted from the η phase, which barely features C, and diffuses preferentially along the grain boundary.…”

Section: Formation Mechanism Of the Reaction Layer And Phasesmentioning

confidence: 99%

Formation Procedure of Reaction Phases in Al Hot Dipping Process of Steel

Shin¹,

Lee

Heo

et al. 2018

Metals

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This study investigated the nucleation and growth mechanism of reaction layers and phases of hot-dipped boron steel in pure Al at 690 °C for 0–120 s. In the case of a dipping time of 30 s, reaction nuclei of width 10–15 μm and height 10 μm were formed on the steel surface in the flow direction of the liquid Al. This reaction layer was formed as a mixture of θ (Fe4Al13) phase of several nm to 2 μm, θ and η (Fe2Al5) of several nm, a columnar η region, and a β (FeAl) region of 500 nm thickness at the steel interface. At the grain boundaries of ferrite, in contact with the η phase, κ (Fe3AlC) was formed. Using the calculated Fe-Al phase diagram, it was determined that when Fe was dissolved in liquid Al from the steel above 2.5 at% (0.6 wt%), the θ phase was formed. Although most of the θ phases continuously grew toward the liquid phase, the θ phase in contact with the steel was transformed into the η phase with minimal differences in composition due to the inter-diffusion of Al and Fe. It was therefore concluded that the η phase formed at the interface became a growth nucleus and grew in a columnar form toward the steel.

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Study on the Formation of Reaction Phase to Si Addition in Boron Steel Hot-Dipped in Al–7Ni Alloy

Cited by 10 publications

References 18 publications

Nano-mechanical properties of novel intermetallic coatings on 316L bioimplant material

Nano-mechanical properties of novel intermetallic coatings on 316L bioimplant material

THE CHARACTERISTICS OF Al-Si COATING ON STEEL 22MnB5 DEPENDING ON THE HEAT TREATMENT

Formation Procedure of Reaction Phases in Al Hot Dipping Process of Steel

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