The effect of FSP on mechanical, tribological, and corrosion behavior of composite layer developed on magnesium AZ91 alloy surface

2014 ◽  
Vol 77 (9-12) ◽  
pp. 2051-2058 ◽  
Author(s):  
M. Abbasi ◽  
B. Bagheri ◽  
M. Dadaei ◽  
H. R. Omidvar ◽  
M. Rezaei
Keyword(s):  
Corrosion Behavior ◽  
Composite Layer ◽  
Alloy Surface ◽  
Az91 Alloy ◽  
Magnesium Az91 Alloy

scholarly journals Adhesion, micro- strain and corrosion behavior of ZrN coated AZ91 alloy as a function of temperature.– CORRIGENDUM

2014 ◽  
Vol 29 (5) ◽  
pp. 729-729
Author(s):  
Seyed Rahim Kiahosseini ◽  
Abdollah Afshar ◽  
Majid Mojtahedzadeh Larijani ◽  
Mardali Yousefpour
Keyword(s):  
Corrosion Behavior ◽  
Az91 Alloy

scholarly journals Structural Aspects of Remelting of the AZ91 Magnesium Alloy Surface Layer

2016 ◽  
Vol 16 (1) ◽  
pp. 13-18
Author(s):  
J. Iwaszko ◽  
M. Strzelecka
Keyword(s):  
Surface Layer ◽  
Magnesium Alloy ◽  
Structural Changes ◽  
Continuous Wave ◽  
Sample Surface ◽  
Alloy Surface ◽  
Az91 Alloy ◽  
Az91 Magnesium Alloy ◽  
Az91 Magnesium ◽  
Alloy Surface Layer

Abstract In this study, modification of the AZ91 magnesium alloy surface layer with a CO2 continuous wave operation laser has been taken on. The extent and character of structural changes generated in the surface layer of the material was being assessed on the basis of both macro- and microscopy investigations, and the EDX analysis. Considerable changes in the structure of the AZ91 alloy surface layer and the morphology of phases have been found. The remelting processing was accompanied by a strong refinement of the structure and a more uniform distribution of individual phases. The conducted investigations showed that the remelting zone dimensions are a result of the process parameters, and that they can be controlled by an appropriate combination of basic remelting parameters, i.e. the laser power, the distance from the sample surface, and the scanning rate. The investigations and the obtained results revealed the possibility of an effective modification of the AZ91 magnesium alloy surface layer in the process of remelting carried out with a CO2 laser beam.

Adhesion, microstrain, and corrosion behavior of ZrN-coated AZ91 alloy as a function of temperature

2013 ◽  
Vol 28 (19) ◽  
pp. 2709-2714 ◽  
Author(s):  
Seyed Rahim Kiahosseini ◽  
Abdollah Afshar ◽  
Majid Mojtahedzadeh Larijani ◽  
Mardali Yousefpour
Keyword(s):  
Corrosion Behavior ◽  
Az91 Alloy ◽  
Image Position

Abstract

Corrosion of Surface Modified AISI 4340 Steel in Jatropha Biodiesel

2015 ◽  
Vol 1115 ◽  
pp. 243-246
Author(s):  
Md Abdul Maleque ◽  
B.A. Ghazal ◽  
Mohammad Yeakub Ali ◽  
M. Hayyan ◽  
A.A. Saleh
Keyword(s):  
Corrosion Behavior ◽  
Composite Layer ◽  
High Hardness ◽  
Corrosion Current ◽  
Substrate Material ◽  
Tungsten Electrode ◽  
Aisi 4340 Steel ◽  
4340 Steel ◽  
Surface Modified ◽  
Aisi 4340

The aim of this paper is to study the effect of jatropha curcas biodiesel on the corrosion behavior of surface modified low alloy steel after modification by TIG torch surface melting technique. The coating layer was produced by preplacement of 1 mg/mm2 TiC particulate into the surface of AISI 4340 steel and at heat input of 1344 J/mm using an electric arc generated from the tungsten electrode that melt the powder with substrate material to form a composite layer. The micrograph of the composite coated surface modified steel showed formation of TiC dendrites that densely populated at the of the melt pool which contributes to the high hardness value. The corrosion behavior of the composite coated steel was studied using tafel extrapolation method in biodiesel environment. The surface micrograph after corrosion test shows pitting corrosion holes as a dominant corrosion phenomenon for AISI 4340 steel. The tafel curve showed reduction of corrosion current density of the surface modified steel compared to the alloy street substrate.

scholarly journals Effect of tool geometry on the velocity and strain rate fields in continuous rotary extrusion of magnesium AZ91 alloy

2018 ◽  
Vol 15 ◽  
pp. 264-271 ◽  
Author(s):  
Nijenthan Rajendran ◽  
Monika Mitka ◽  
Marzena Lech-Grega ◽  
Wojciech Z. Misiolek
Keyword(s):  
Strain Rate ◽  
Az91 Alloy ◽  
Tool Geometry ◽  
Magnesium Az91 Alloy

scholarly journals Improvement of AZ91 Alloy Corrosion Properties by Duplex NI-P Coating Deposition

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1357 ◽  
Author(s):  
Jaromír Wasserbauer ◽  
Martin Buchtík ◽  
Jakub Tkacz ◽  
Stanislava Fintová ◽  
Jozef Minda ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Corrosion Behavior ◽  
Electrochemical Impedance ◽  
Salt Spray ◽  
Az91 Alloy ◽  
Neutral Salt ◽  
Az91 Magnesium Alloy ◽  
Corrosion Properties ◽  
Az91 Magnesium

The corrosion behavior of duplex Ni-P coatings deposited on AZ91 magnesium alloy was studied. The electroless deposition process of duplex Ni-P coating consisted in the preparation of low-phosphorus Ni-P coating (5.7 wt.% of P), which served as a bond coating and high-phosphorus Ni-P coating (11.5 wt.% of P) deposited on it. The duplex Ni-P coatings with the thickness of 25, 50, 75 and 100 µm were deposited on AZ91 magnesium alloy. The electrochemical corrosion behavior of coated AZ91 magnesium alloy was investigated by electrochemical impedance spectroscopy and potentiodynamic polarization method in 0.1 M NaCl. Obtained results showed a significant improvement in the corrosion resistance of coated specimens when compared to uncoated AZ91 magnesium alloy. From the results of the immersion tests in 3.5 wt.% NaCl, 10% solution of HCl and NaOH and 5% neutral salt spray, a noticeable increase in the corrosion resistance with the increasing thickness of the Ni-P coating was observed.

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