Deterioration of mechanical properties for pre-corroded AZ31 sheet in simulated physiological environment

Fu, Shencheng; Gao, Hong; Gao, Lilan; Chen, X.

doi:10.1016/j.msea.2013.11.012

Cited by 32 publications

(28 citation statements)

References 35 publications

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“…The solutions were prepared from analytical grade chemicals and distilled water, following the preparation procedure of the Ref. [26]. A miniaturized chamber attachment, which guaranteed the gage length of samples immersed in the PBS throughout the testing procedure, was self-designed and assembled on the EUM-25k20 testing machine, as shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

Ratcheting and low-cycle fatigue characterizations of extruded AZ31B Mg alloy with and without corrosive environment

Chen

Cui

et al. 2015

International Journal of Fatigue

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Section: Methodsmentioning

confidence: 99%

Ratcheting and low-cycle fatigue characterizations of extruded AZ31B Mg alloy with and without corrosive environment

Chen

Cui

et al. 2015

International Journal of Fatigue

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“…The corrosion effect is represented by a time dependent reduction of the fatigue limit. Notably, ultimate tensile strength, elongation and elastic modulus of engineering metals (steels, aluminium and magnesium alloy) insignificantly decrease when immersed in a certain corrosive environment for different time span (14)(15)(16). Therefore, the ultimate tensile strength is assumed as a constant value in the proposed model.…”

Section: Theoretical Modelmentioning

confidence: 99%

A Non-Linear Model for Corrosion Fatigue Lifetime Based on Continuum Damage Mechanics

2018

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Abstract. Many structures, such as oil platforms and wind turbines, are built in the marine environment. These structures do not merely suffer from variable cyclic loading due to wind, waves and current, but also from corrosion. Their interaction can give rise to corrosion fatigue, thus reducing the service life and integrity of the structure. The research community witnesses a challenge to identify damage mechanisms of combined fatigue loading and corrosion, and to link this to the lifetime prediction of offshore structures. In this paper, a non-linear corrosion fatigue model is proposed to describe damage accumulation based on continuum damage mechanics. Fatigue endurance limit, load frequency and corrosion rate are included in the model as basic parameters which influence the interaction between fatigue and corrosion. A sequential load effect is revealed via integration of the non-linear accumulation of damage. Parametric studies are conducted to show the abilities of the model. Preliminary simulation results agree to a strong extent with experimental data in the form of corrosion fatigue S-N curves. Nonetheless, deviations are observed at lower life times and these are prone to further investigation. In the future, parameters will be calibrated and further validation experiments will be performed.

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“…Pure magnesium corrodes quickly in the physiological pH (7.4–7.6) and high chloride environment of the physiological system and then loses mechanical integrity before the tissue has sufficiently healed . The rapid degradation and localized corrosion of Mg alloys in the physiological environment would deteriorate the reliability of Mg‐based implants for load‐bearing applications …”

Section: Introductionmentioning

confidence: 99%

“…Fatigue failure is more possible to occur when some material or structure is subjected to cyclic loading . Things can be quite serious when considering the synergetic effects of corrosion and fatigue, or corrosion fatigue, which is much more severe than each one occurring on its own . Corrosion environment assists corrosion pits formation at the surface region, where the alloy is exposed and experiences high strain .…”

Section: Introductionmentioning

confidence: 99%

“…compared the fatigue behaviours of bare and pre‐corroded magnesium alloy AZ31 and found that the fatigue limit of the pre‐corroded AZ31 was reduced to 50% of the respective value of the un‐corroded material. Fu et al . found the decreases of the tensile and fatigue behaviours of an AZ31 sheet in a simulated physiological environment and proposed a ratcheting fatigue life prediction model.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Biodegradable behaviour and fatigue life of ZEK100 magnesium alloy in simulated physiological environment

Zhao

Gao

et al. 2015

Fatigue Fract Eng Mat Struct

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The fatigue life of ZEK100 magnesium alloy in the phosphate buffered solution for various immersion intervals was investigated by experiments and theoretical predictions. The biodegradable behaviours of ZEK100 magnesium alloy were also studied. Microstructure observation showed that the corrosion behaviours were characterized by pitting corrosion. The corrosion rate decreased a lot in the initial 7 d and then almost stayed unchanged. After 28 d immersion, the elastic modulus almost kept stable, while the yield strength and the ultimate strength decreased a lot, which indicated that corrosion had important effects on the tensile mechanical properties. It showed that the fatigue life of the samples under the same stress conditions decreased with increasing immersion time under the asymmetric stress‐controlled cyclic loading. Considering the effect of corrosion on the material failure, a modified fatigue life model was proposed for magnesium alloy under corrosion.

show abstract

Deterioration of mechanical properties for pre-corroded AZ31 sheet in simulated physiological environment

Cited by 32 publications

References 35 publications

Ratcheting and low-cycle fatigue characterizations of extruded AZ31B Mg alloy with and without corrosive environment

Ratcheting and low-cycle fatigue characterizations of extruded AZ31B Mg alloy with and without corrosive environment

A Non-Linear Model for Corrosion Fatigue Lifetime Based on Continuum Damage Mechanics

Biodegradable behaviour and fatigue life of ZEK100 magnesium alloy in simulated physiological environment

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