The effect of residual stress and gradient nanostructure on the fretting fatigue behavior of plasma electrolytic oxidation coated Ti–6Al–4V alloy

2019 ◽  
Vol 811 ◽  
pp. 152017 ◽  
Author(s):  
Ni Ao ◽  
Daoxin Liu ◽  
Xiaohua Zhang ◽  
Kaifa Fan ◽  
Hailan Shi ◽  
...  
Keyword(s):  
Residual Stress ◽  
Plasma Electrolytic Oxidation ◽  
Fatigue Behavior ◽  
Fretting Fatigue ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

scholarly journals Fatigue Behavior of the Rare Earth Rich EV31A Mg Alloy: Influence of Plasma Electrolytic Oxidation

Metals ◽  
2017 ◽  
Vol 7 (6) ◽  
pp. 212 ◽  
Author(s):  
Lorella Ceschini ◽  
Alessandro Morri ◽  
Valerio Angelini ◽  
Simone Messieri
Keyword(s):  
Rare Earth ◽  
Plasma Electrolytic Oxidation ◽  
Fatigue Behavior ◽  
Mg Alloy ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic ◽  
The Rare Earth

scholarly journals Fatigue Behavior of the Rare Earth Rich EV31A Mg Alloy: Influence of Plasma Electrolytic Oxidation

2017 ◽  
Author(s):  
Lorella Ceschini ◽  
Alessandro Morri ◽  
Valerio Angelini ◽  
Simone Messieri
Keyword(s):  
Surface Roughness ◽  
Rare Earth ◽  
Fatigue Strength ◽  
Plasma Electrolytic Oxidation ◽  
Crack Nucleation ◽  
Fatigue Behavior ◽  
Fatigue Tests ◽  
Mg Alloy ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

Rare earth rich magnesium alloys are used in aerospace and automotive fields because of their high specific strength and good castability. However, due to their low corrosion resistance, protective surface treatments, such as conversion coating or electroless plating are necessary, when they have to be used in humid or corrosive environments. The present study was aimed to evaluate the effect of Plasma Electrolytic Oxidation (PEO) and different surface roughness  (Ra≈0.8 μm and Ra≈0.3 μm) on the rotating bending fatigue of an innovative Mg alloy, with a high content of Nd (up to 3.1 wt%) and Gd (up to 1.7 wt %). Fatigue tests revealed a 15% decrease in the fatigue strength of the PEO treated alloy (fatigue strength = 88 MPa) with respect to the bare alloy (fatigue strength = 103 MPa). The reduction of fatigue strength was mainly due to the residual tensile stresses induced by the PEO treatment. The effect of surface roughness on the bare alloy was, instead, negligible. The mechanisms of crack initiation were similar in the untreated and PEO treated alloy, with crack nucleation sites located in correspondence of large facets of the cleavage planes.

scholarly journals Fatigue Behavior of the Rare Earth Rich EV31A Mg Alloy: Influence of Plasma Electrolytic Oxidation

2017 ◽  
Author(s):  
Lorella Ceschini ◽  
Alessandro Morri ◽  
Valerio Angelini ◽  
Simone Messieri
Keyword(s):  
Surface Roughness ◽  
Rare Earth ◽  
Plasma Electrolytic Oxidation ◽  
Crack Nucleation ◽  
Fatigue Behavior ◽  
Fatigue Tests ◽  
Mg Alloy ◽  
Specific Strength ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

Rare earth rich magnesium alloys are used in aerospace and automotive fields because of their high specific strength and good castability. However, due to their low corrosion resistance, protective surface treatments, such as conversion coating or electroless plating are necessary, when they have to be used in humid or corrosive environments. The present study was aimed to evaluate the effect of Plasma Electrolytic Oxidation (PEO) and different surface roughness on the rotating bending fatigue of an innovative Mg alloy, with a high content of Nd (up to 3.1 wt%) and Gd (up to 1.7 wt %). Fatigue tests revealed a 15% decrease in the fatigue strength of the PEO treated alloy with respect to the bare alloy, probably due to the residual tensile stresses induced by the treatment. The effect of surface roughness on the bare alloy was, instead, negligible. The mechanisms of crack initiation were similar in the untreated and PEO treated alloy, with crack nucleation sites located in correspondence of large facets of the cleavage planes.

ffect of Na2WO4 in electrolyte on mechanical properties of oxide layer on Al alloy via plasma electrolytic oxidation

2015 ◽  
Vol 53 (8) ◽  
pp. 535-540 ◽  
Author(s):  
Young Gun Ko ◽  
Dong Hyuk Shin ◽  
Hae Woong Yang ◽  
Yeon Sung Kim ◽  
Joo Hyun Park ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Oxide Layer ◽  
Plasma Electrolytic Oxidation ◽  
Al Alloy ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

MODELING OF THE ELECTROLYZER ELECTRIC FIELD FOR PEO OF MAGNESIUM FOR THE STUDY OF SPECIAL CHAPTERS OF ELECTRICAL ENGINEERING

2019 ◽  
Author(s):  
Veta Mukaeva ◽  
E. Parfenov ◽  
R. Mukaev ◽  
M. Gorbatkov
Keyword(s):  
Magnesium Alloy ◽  
Electric Field ◽  
Plasma Electrolytic Oxidation ◽  
Electrical Engineering ◽  
Professional Competencies ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

The issue of modeling the distribution of the electric field in the electrolyzer during the plasma-electrolytic oxidation of a magnesium alloy for the motivation and formation of professional competencies for students in the study of electrical engineering disciplines is considered.

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