A study on stress corrosion cracking and hydrogen embrittlement of AZ31 magnesium alloy

Song, Renguo; Blawert, Carsten; Dietzel, W.; Atrens, Andrej

doi:10.1016/j.msea.2005.04.003

Cited by 132 publications

(88 citation statements)

References 21 publications

(23 reference statements)

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“…7b). This type of failure was also earlier observed in AZ31 Mg alloys [10,11]. The fracture surface of FSW samples tested in air also showed ductile features (Fig.…”

Section: Resultssupporting

confidence: 82%

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A study on the SCC susceptibility of friction stir welded AZ31 Mg sheet

Kannan¹,

Dietzel²,

Zeng

et al. 2007

Materials Science and Engineering: A

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In this study, the stress corrosion cracking (SCC) behavior of friction stir welded (FSW) AZ31 Mg alloy was examined using slow strain rate tensile (SSRT) test method.Electrochemical impedance spectroscopy (EIS) and salt spray tests were carried to understand the general corrosion behavior. The FSW AZ31 Mg samples exhibited higher SCC susceptibility than the base material during SSRT in corrosive environment. The failure of the FSW AZ31 Mg samples occurred in the stir zone (SZ) when tested in corrosive environment, in contrast to the failure in the thermo mechanically affected zone (TMAZ) observed in tests in air. However, the EIS and salt spray test results showed a higher general corrosion resistance of the SZ than the base material. The study suggests that hydrogen assisted cracking could be a reason for the higher SCC susceptibility of FSW AZ31 Mg samples than the base material.

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“…7b). This type of failure was also earlier observed in AZ31 Mg alloys [10,11]. The fracture surface of FSW samples tested in air also showed ductile features (Fig.…”

Section: Resultssupporting

confidence: 82%

“…It is well known that Mg alloys are susceptible to localized corrosion such as pitting and stress corrosion cracking (SCC) [8][9][10]. Major studies show that SCC susceptibility of Mg alloys in chloride containing solutions, and some even in distilled water [8,9].…”

Section: Introductionmentioning

confidence: 99%

A study on the SCC susceptibility of friction stir welded AZ31 Mg sheet

Kannan¹,

Dietzel²,

Zeng

et al. 2007

Materials Science and Engineering: A

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“…Current research suggests that chloride ions produce pitting in the protective surface layer, wh ich ultimately leads to a break down in the layer exposing the underlining Mg matrix to the electrolytic flu ids of the body environment. The resulting hydrogen diffuses into the stressed zone of the metal matrix ahead of the crack tip and allows the SCC crack to advance through the zone [117][118][119]. Fracture and failu re of the imp lant will occur when the SCC is belo w the normal operating stress of the implant.…”

Section: Stress Corrosionmentioning

confidence: 99%

Biomedical Magnesium Alloys: A Review of Material Properties, Surface Modifications and Potential as a Biodegradable Orthopaedic Implant

Poinern¹,

Brundavanam²,

Fawcett³

2013

AJBE

276

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Magnesium and magnesium based alloys are lightweight metallic materials that are extremely biocompatib le and have similar mechanical properties to natural bone. These materials have the potential to function as an osteoconductive and biodegradable substitute in load bearing applicat ions in the field of hard t issue engineering. However, the effects of corrosion and degradation in the physiological environ ment of the body has prevented their wide spread applicat ion to date. The aim o f this review is to examine the properties, chemical stability, degradation in situ and methods of improving the corrosion resistance of magnesium and its alloys for potential application in the orthopaedic field. To be an effective imp lant, the surface and sub-surface properties of the material needs to be carefully selected so that the degradation kinetics of the implant can be efficiently controlled. Several surface modification techniques are presented and their effectiveness in reducing the corrosion rate and methods of controlling the degradation period are discussed. Ideally, balancing the gradual loss of material and mechanical strength during degradation, with the increasing strength and stability of the newly forming bone tissue is the ultimate goal. If this goal can be achieved, then orthopaedic implants manufactured fro m magnesium based alloys have the potential to deliver successful clinical outcomes without the need for revision surgery.

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“…Initiation and advancement of SCC is very difficult to detection, although it leads to essential microstructural changes. Material failure during stress corrosion displays no significant indications, especially in initial stages and advancement of micro cracking [2]. SCC of magnesium alloys is extremely dangerous in hydrogen containing environments, even at very low concentration [3,4].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Stress Corrosion Cracking in Magnesium Alloys by Quantitative Fractography Methods

Sozańska

Mościcki

Chmiela

2017

Archives of Metallurgy and Materials

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The article shows that the use of quantitative fracture description may lead to significant progress in research on the phenomenon of stress corrosion cracking of the WE43 magnesium alloy. Tests were carried out on samples in air, and after hydrogenation in 0.1 M Na 2 SO 4 with cathodic polarization. Fracture surfaces were analyzed after different variants of the Slow Strain Rate Test. It was demonstrated that the parameters for quantitative evaluation of fracture surface microcracks can be closely linked with the susceptibility of the WE43 magnesium alloy operating under complex state of the mechanical load in corrosive environments. The final result of the study was the determination of the quantitative relationship between Slow Strain Rate Test parameters, the mechanical properties, and the parameters of the quantitative evaluation of fracture surface (microcracks).

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A study on stress corrosion cracking and hydrogen embrittlement of AZ31 magnesium alloy

Cited by 132 publications

References 21 publications

A study on the SCC susceptibility of friction stir welded AZ31 Mg sheet

A study on the SCC susceptibility of friction stir welded AZ31 Mg sheet

Biomedical Magnesium Alloys: A Review of Material Properties, Surface Modifications and Potential as a Biodegradable Orthopaedic Implant

Investigation of Stress Corrosion Cracking in Magnesium Alloys by Quantitative Fractography Methods

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