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Poly caprolactone/titanium dioxide nanofiber coating on am50 alloy for biomedical application

Journal of Magnesium and alloys 2021年第2期9卷 532-547页

作者： Mani Karthega Mogan Pranesh Chockalingam Poongothai Nagarajan Srinivasan Department of Sciences Amrita School of EngineeringCoimbatoreAmrita VishwaVidyapeethamIndia Department of Chemistry Manonmaniam Sundaranar UniversityTirunelveliIndia

Poly caprolactone(PCL)and Poly caprolactone/TiO_(2)(PCL/TiO_(2))composite nanofiber with different weight percentage compositions(2 wt%,4 wt%and 6 wt%)of TiO_(2)were prepared and coated over am50 alloy using electrospinning *** surface morphology and elemental composition result confirms that the PCL/TiO_(2)composite nanofiber fiber were successfully electrospun on the surface of am50 *** degradation behavior of PCL and PCL/6 wt%TiO_(2)coated am50 alloy was studied by immersing in Simulated Body Fluid(SBF)*** electrochemical and cell proliferation studies reveals that the cellular behavior of PCL and PCL/6 wt%TiO_(2)composite nanofiber exhibited good support for cell proliferation with enhanced corrosion resistance of am50 alloy in SBF solution.

关键词： Electrospinning am50 alloy Polycaprolactone Biocompatible Corrosion resistance Electrochemical studies

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Effect of finish-rolling conditions on mechanical properties and texture characteristics of am50 alloy sheet

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Transactions of Nonferrous Metals Society of China 2014年第9期24卷 2761-2766页

作者：丁汉林张义伟 Shigeharu KamADO 安徽工业大学材料科学与工程学院马鞍山243002 Department of Mechanical Engineering Nagaoka University of TechnologyKamitomiokaNagaoka Niigata 940-2188 Japan

The conventional hot rolling of am50 alloy at different roll temperatures and speeds was performed to investigate the effects of finish-rolling conditions on the mechanical properties and texture of rolled sheet. The better combination between strength（ultimate tensile strength： 295 MPa; yield strength： 224 MPa） and ductility（22.9%） can be obtained for the am50 sheet rolled at the roll temperature of 200 °C with the roll speed of 5 m/min. The yield stress depends strongly on roll temperature, while the texture intensity in rolled sheets is more sensitive to roll speed during hot rolling. Increasing rolling temperature or roll speed can improve the mechanical anisotropy of am50 rolled sheets.

关键词： am50 alloy hot rolling mechanical anisotropy texture

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Low Porosity in Cast Magnesium Welds by Advanced Laser Twin-Spot Welding

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Materials Sciences and Applications 2019年第1期10卷 53-64页

作者： Karl Fahlstrom Jon Blackburn Leif Karlsson Lars-Erik Svensson Swerea KIMAB KistaSweden University West TrollhattanSweden TWI Ltd. CambridgeUK

Porosity is reported to be a major issue when welding cast magnesium. Therefore, it is important to understand the pore formation mechanisms and find procedures that could be used to reduce porosity. This study investigated the possibility of using twin-spot optics for reducing the porosity in laser welded cast magnesium. Two twin-spot welding setups were compared using either a beam splitter or twin-spot welding with primary and secondary (placed in front of the primary optic) optics. The results showed that welding with a dual optic setup with a defocused secondary beam reduced the volumetric porosity in the weld to 5%. The highest levels of volumetric porosity were 30%, and were a result of using the dual optic setup, but with a defocused primary beam. No clear relation between the level of porosity and power or welding speed was found. It was found that the amount of porosity depended on the balance of the energy input (controlled by defocusing) between the two beams. Porosity formation can be reduced if the energy from the first beam results in the nucleation and initial growth of pores. Reheating by the second beam then allows the pores to grow and escape from the molten material without melting additional base material. Furthermore, twin-spot welding is shown to be a promising combination of a production friendly solution and high quality welding.

关键词： Laser Welding Cast Magnesium Twin-Spot Metallurgy Porosity Automotive am50 alloy

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