Finite Element Based Physical Chemical Modeling of Corrosion in Magnesium Alloys

Magnesium alloys have found widespread applications in diverse fields such as aerospace, automotive, bio-medical and electronics industries due to its relatively high strength-to-weight ratio. However, stress corrosion cracking of these alloys severely restricts their applications in several novel technologies. Hence, it will be useful to identify the corrosion mechanics of magnesium alloys under external stresses as it can provide further insights on design of these alloys for critical applications. In the present study, the corrosion mechanics of a commonly used magnesium alloy, AZ31, is studied using finite element simulation with a modified constitutive material damage model. The data obtained from the finite element modeling were further used to formulate a mathematical model using computational intelligence algorithm. Sensitivity and parametric analysis of the derived model further corroborated the mechanical response of the alloy in line with the corrosion physics. The proposed approach is anticipated to be useful for materials engineers for optimizing the design criteria for magnesium alloys catered for high temperature applications.

[1]  Zahra Mohammadi,et al.  A hybrid intelligent model combining ANN and imperialist competitive algorithm for prediction of corrosion rate in 3C steel under seawater environment , 2017, Neural Computing and Applications.

[2]  Fu-hui Wang,et al.  Effect of variations of Al content on microstructure and corrosion resistance of PEO coatings on MgAl alloys , 2017 .

[3]  Zhihui Zhang,et al.  Preparation and corrosion behaviors of calcium phosphate conversion coating on magnesium alloy , 2016 .

[4]  W. Shang,et al.  Corrosion resistance and molecular dynamics behavior of the MAO/SAM composite coatings on magnesium alloy , 2016, Protection of Metals and Physical Chemistry of Surfaces.

[5]  I. Celik.  Structure and surface properties of Al2O3–TiO2 ceramic coated AZ31 magnesium alloy , 2016 .

[6]  Siddiq M. Qidwai,et al.  An Extended Finite Element Method Based Approach for Modeling Crevice and Pitting Corrosion , 2016 .

[7]  C. Dong,et al.  Damage and Failure Analysis of AZ31 Alloy Sheet in Warm Stamping Processes , 2016, Journal of Materials Engineering and Performance.

[8]  Sylvie Castagne,et al.  Computational model for predicting the effect of process parameters on surface characteristics of mass finished components , 2016 .

[9]  I. Beyerlein,et al.  Strength and ductility with {101̄1} — {101̄2} double twinning in a magnesium alloy , 2016, Nature Communications.

[10]  H. Patle,et al.  Magnesium based surface metal matrix composites by friction stir processing , 2016 .

[11]  R. Raman,et al.  Understanding Corrosion‐Assisted Cracking of Magnesium Alloys for Bioimplant Applications , 2016 .

[12]  Shervin Eslami Harandi,et al.  A Review of Stress-Corrosion Cracking and Corrosion Fatigue of Magnesium Alloys for Biodegradable Implant Applications , 2015 .

[13]  C. Davies,et al.  Corrosion fatigue of a magnesium alloy in modified simulated body fluid , 2015 .

[14]  Shervin Eslami Harandi,et al.  Corrosion fatigue fracture of magnesium alloys in bioimplant applications: A review , 2015 .

[15]  Gholamreza Khalaj,et al.  Predictions of corrosion current density and potential by using chemical composition and corrosion cell characteristics in microalloyed pipeline steels , 2015 .

[16]  R. K. Singh Raman,et al.  In vitro investigation of biodegradable polymeric coating for corrosion resistance of Mg-6Zn-Ca alloy in simulated body fluid. , 2014, Materials science & engineering. C, Materials for biological applications.

[17]  R. K. Singh Raman,et al.  In-vitro characterization of stress corrosion cracking of aluminium-free magnesium alloys for temporary bio-implant applications. , 2014, Materials science & engineering. C, Materials for biological applications.

[18]  Z. Chen,et al.  Failure Analysis of Warm Stamping of Magnesium Alloy Sheet Based on an Anisotropic Damage Model , 2014, Journal of Materials Engineering and Performance.

[19]  P E McHugh,et al.  A physical corrosion model for bioabsorbable metal stents. , 2014, Acta biomaterialia.

[20]  Y. Lin,et al.  Uniaxial ratcheting and fatigue failure behaviors of hot-rolled AZ31B magnesium alloy under asymmetrical cyclic stress-controlled loadings , 2013 .

[21]  R. Mishra,et al.  Stress corrosion cracking susceptibility of ultrafine grained AZ31 , 2012, Journal of Materials Science.

[22]  Sanjib Kumar Acharyya,et al.  A complete GTN model for prediction of ductile failure of pipe , 2008 .

[23]  Viggo Tvergaard,et al.  An analysis of dynamic, ductile crack growth in a double edge cracked specimen , 1991 .

[24]  R. M. Spriggs,et al.  Mechanical Properties of Pure, Dense Magnesium Oxide as a Function of Temperature and Grain Size , 1964 .

[25]  Nak Hyun Kim,et al.  A finite element ductile failure simulation method using stress-modified fracture strain model , 2011 .

[26]  Dominic P. Searson,et al.  GPTIPS: An Open Source Genetic Programming Toolbox For Multigene Symbolic Regression , 2010 .