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논문 기본 정보

자료유형
학술저널
저자정보
Sepehr Samiei (University of Isfahan) Ghasem Dini (University of Isfahan) Mehdi Ebrahimian‑Hosseinabadi (University of Isfahan)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.29 No.1
발행연도
2023.1
수록면
192 - 203 (12page)
DOI
10.1007/s12540-022-01202-y

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In this work, the effect of the accumulative roll bonding (ARB) process on the microstructure, mechanical properties, andcorrosion characteristics of AZ31 Mg alloy was investigated. First, the ARB process up to 3 cycles at 350 °C was applied toannealed AZ31 Mg alloy sheets. Then, all samples were characterized via microstructure observations, mechanical investigations,and also, electrochemical analyses, and immersion tests in simulated body fluid (SBF) solution. In addition, the L929cell line was used to evaluate the cytotoxicity of the samples. The obtained results showed that after the third ARB cycle, theaverage grain size in the annealed sample decreased from ~ 14 to ~ 3 μm. Some ultra-fine grained (UFG) microstructures thathad a grain size of fewer than 1 μm were also observed in the 3-cycle ARB-processed sample. This grain refinement led to anincrease in the yield strength and micro-hardness values of the annealed sample from ~ 153 MPa, and ~ 55 Hv to ~ 214 MPa,and ~ 76 Hv. However, the ARB process had an adverse effect on the corrosion characteristics of samples, and the corrosionrate increased after the ARB process. Moreover, the viability of L929 cells in culture media containing extracts obtained fromthe annealed sample was higher than that for the 3-cycle ARB-processed sample after 3 days of incubation. The influenceof microstructural evolution in the ARB-processed AZ31 Mg alloy on the corresponding mechanical properties, corrosionbehaviors, and cytotoxicity results was discussed in detail.

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