Fatigue behavior after pre‐corroded in a simulated body fluid for ZK60 magnesium alloy prepared by micro‐arc oxidation

2021 ◽  
Author(s):  
Ying Xiong ◽  
Yi Yu ◽  
Jie Yang
Keyword(s):  
Magnesium Alloy ◽  
Simulated Body Fluid ◽  
Body Fluid ◽  
Fatigue Behavior ◽  
Micro Arc Oxidation ◽  
Zk60 Magnesium Alloy

scholarly journals Effect of pre-corroded on fatigue behavior of MAO treated ZK60 magnesium alloy in a simulated body fluid

2021 ◽  
Author(s):  
Ying Xiong ◽  
Jie Yang ◽  
Yi Yu ◽  
Liuyong He
Keyword(s):  
Fatigue Life ◽  
Simulated Body Fluid ◽  
Cyclic Deformation ◽  
Body Fluid ◽  
Fatigue Behavior ◽  
Fatigue Tests ◽  
Total Strain Energy ◽  
Micro Arc Oxidation ◽  
Loading Modes ◽  
Zk60 Magnesium Alloy

A bio-ceramic coating was prepared on the surface of ZK60 magnesium alloys by micro-arc oxidation (MAO) method. The substrate (BM) and coated (MAO) specimens were pre-corroded in a simulated body fluid (SBF) for 12 h. Strain-controlled and stress-controlled loading modes were used to conduct fatigue tests for the two specimens, respectively. The cyclic deformation behavior of the two specimens with non-corroded and pre-corroded was studied. The mechanism of cyclic deformation under different loading conditions is related to twinning and slip. At the same test conditions, the fatigue life of the non-corroded BM specimen is higher than that of the non-corroded MAO specimen, while the fatigue life of the pre-corroded MAO specimen is higher than that of the pre-corroded BM specimen. A modified total strain energy model is proposed and the precision of life prediction is higher than that of traditional fatigue model.

The Effect of n-TiO2 on Corrosion and Biological Activity of Biocoatings Coated by Ultrasound Micro-Arc Oxidation on Pure Magnesium

2014 ◽  
Vol 633 ◽  
pp. 418-421 ◽  
Author(s):  
Chen Ma ◽  
Yan Gao ◽  
Li Jie Qu ◽  
Mu Qin Li ◽  
Jin Long Yue ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Biological Activity ◽  
Magnesium Alloy ◽  
Simulated Body Fluid ◽  
Surface Morphology ◽  
Body Fluid ◽  
Electrochemical Corrosion ◽  
Order Of Magnitude ◽  
Micro Arc Oxidation ◽  
Different Content

In order to improve the corrosion resistance and bioactivity of magnesium alloy coated by ultrasound micro-arc oxidation (UMAO), different content of n-TiO2 was added into silicate electrolyte. Electrochemical corrosion and simulated body fluid (SBF) soaking were conducted, and the surface morphology, phase structure and composition also were analyzed. The results indicated that Ecorr and Icorr of UMAO biocoatings with n-TiO2 increased and decreased an order of magnitude with increase of n-TiO2, respectively. The corrosion resistance of coatings with adding 4.8g/L n-TiO2 into electrolyte was the best. After soaking in SBF, the samples increased loose weight firstly and then increased weight to form Mg3Ca (CO3)4, Mg10Cl (OH)18·5H2O and Na4Mg2(PO4) ·2H2O new phases and Mg, MgO, MgSiO3 were still exit, which showed that good bioactivity of the UMAO coatings with n-TiO2.

Biodegradable Behaviors in Simulated Body Fluid of Mg-Gd-Y-Zr Alloy with Micro-Arc Oxide Coating

2013 ◽  
Vol 747-748 ◽  
pp. 295-300
Author(s):  
Kai Yang Yin ◽  
Tian Feng Lu ◽  
Qing Dong ◽  
Bing Yi Sun ◽  
Bin Chen
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Simulated Body Fluid ◽  
Body Fluid ◽  
Oxide Coating ◽  
Volume Measurement ◽  
Before And After ◽  
Micro Arc Oxidation ◽  
Weight Loss Method ◽  
Loss Method

The effects of micro-arc oxidation (MAO) on corrosion resistance of Mg-Gd-Y-Zr magnesium alloy have been studied. The Mg-Gd-Y-Zr with thicker oxide coating presented higher corrosion resistance in simulated body fluid (SBF). The corrosion rates were measured by several methods including hydrogen evolution volume measurement, weight-loss method and determination of pH as an auxiliary reference. The surfaces of specimens were observed by SEM and white light confocal microscopy before and after the corrosion. Besides the effects of MAO, the pitting resulted from breakage of oxide coating played a notable role as well. This provided a new direction towards the enhancement of corrosion resistance of magnesium alloy.

Dynamic corrosion behavior of AZ80 magnesium alloy with different orientations in simulated body fluid

2021 ◽  
Vol 259 ◽  
pp. 124039
Author(s):  
Tao Zhu ◽  
Yi Yu ◽  
Jie Yang ◽  
Yongshui Shen ◽  
Liuyong He ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Simulated Body Fluid ◽  
Corrosion Behavior ◽  
Body Fluid ◽  
Az80 Magnesium Alloy
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