Microstructural evolution, mechanical properties, and corrosion resistance of a heat-treated Mg alloy for the bio-medical application

Janbozorgi, Mohammad; Taheri, Kimia Karimi; Taheri, Ali

doi:10.1016/j.jma.2018.11.002

Cited by 55 publications

(11 citation statements)

References 34 publications

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“…Another well-known approach to inhibit corrosion on alloy materials by microstructure refinement and homogeneous element distribution is applying alternative manufacturing techniques and thermomechanical/finishing processes [ 49 ]. Additive manufacturing or 3D printing (e.g., selective laser melting (SLM), electron beam melting (EBM), laser metal deposition (LMD), selective laser sintering (SLS), binder jetting (BJ), laser engineered net shaping (LENS), and wire arc additive manufacturing (WAAM)) [ 55 , 82 – 86 ], as well as finishing (e.g., burnishing, laser surface treatments, and shot penning) [ 87 – 89 ], and thermomechanical processing (e.g., aging and annealing) [ 90 , 91 ] are a set of techniques that have been used to fabricate new alloys with protective properties against corrosion by (i) complete oxidation of alloying elements and growth of a uniform surface film, (ii) formation of defect-free microstructures with refined grain structures, and (iii) homogeneous distribution of alloying elements without solute segregation.…”

Section: The Search For Corrosion-resistant Alloys For Dental Implantsmentioning

confidence: 99%

Insight Into Corrosion of Dental Implants: From Biochemical Mechanisms to Designing Corrosion-Resistant Materials

Nagay

Cordeiro

Barão

2022

Curr Oral Health Rep

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Purpose of Review Despite advanced technologies to avoid corrosion of dental implants, the mechanisms toward the release of metals and their role in the onset of peri-implant diseases are still under-investigated. Effective knowledge on the etiopathogenesis of corrosive products and preventive strategies mitigating the risks for surface degradation are thus in dire need. This review aimed to summarize evidence toward biocorrosion in the oral environment and discuss the current strategies targeting the improvement of dental implants and focusing on the methodological and electrochemical aspects of surface treatments and titanium-based alloys. Recent Findings Recent studies suggest the existence of wear/corrosion products may correlate with peri-implantitis progress by triggering microbial dysbiosis, the release of pro-inflammatory cytokines, and animal bone resorption. Furthermore, current clinical evidence demonstrating the presence of metal-like particles in diseased tissues supports their possible role as a risk factor for peri-implantitis. For instance, to overcome the drawback of titanium corrosion, researchers are primarily focusing on developing corrosion-resistant alloys and coatings for dental implants by changing their physicochemical features. Summary The current state-of-art discussed in this review found corrosion products effective in affecting biofilm virulence and inflammatory factors in vitro. Controversial and unstandardized data are limitations, making the premise of corrosion products being essential for peri-implantitis onset. On the other hand, when it comes to the strategies toward reducing implant corrosion rate, it is evident that the chemical and physical properties are crucial for the in vitro electrochemical behavior of the implant material. For instance, it is foreseeable that the formation of films/coatings and the incorporation of some functional compounds into the substrate may enhance the material’s corrosion resistance and biological response. Nevertheless, the utmost challenge of research in this field is to achieve adequate stimulation of the biological tissues without weakening its protective behavior against corrosion. In addition, the translatability from in vitro findings to clinical studies is still in its infancy. Therefore, further accumulation of high-level evidence on the role of corrosion products on peri-implant tissues is expected to confirm the findings of the present review besides the development of better methods to improve the corrosion resistance of dental implants. Furthermore, such knowledge could further develop safe and long-term implant rehabilitation therapy.

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Section: The Search For Corrosion-resistant Alloys For Dental Implantsmentioning

confidence: 99%

Insight Into Corrosion of Dental Implants: From Biochemical Mechanisms to Designing Corrosion-Resistant Materials

Nagay

Cordeiro

Barão

2022

Curr Oral Health Rep

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“…At this temperature, the residual second phases volume fraction was only 0.34% ± 0.13% with a relatively homogeneous dissolution. After solution treatment, the remaining phase with small size played a significant role in reducing the microgalvanic corrosion [4,31]. However, the T4-510 sample had a higher corrosion rate, indicating that the second phase was not the only factor affecting corrosion.…”

Section: Microstructures Analysismentioning

confidence: 99%

Enhancing the Corrosion Resistance Performance of Mg-1.8Zn-1.74Gd-0.5Y-0.4Zr Biomaterial via Solution Treatment Process

Wen

Yao

et al. 2020

Materials

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Microstructure and corrosion behavior of the solution-treated Mg-1.8Zn-1.74Gd-0.5Y-0.4Zr (wt%) alloy were studied. The results of microstructure indicated that the second phases of as-cast alloy was mainly comprised of Mg12Zn(Gd,Y) phase, Mg3Zn3(Gd,Y)2 phase and (Mg,Zn)3(Gd,Y) phase. After solution treatment process, the second phase gradually dissolved into the matrix, and the grain size increased. The effect of microgalvanic corrosion between α-Mg matrix and second phase was also improved. At the range of 470~510 °C solution treatment temperature, the corrosion resistance of the samples increases at first and then decreases slightly at 510 °C. All the solution-treated Mg-Zn-Gd-Y-Zr samples exhibit better corrosion resistance in comparison with as-cast sample. The existence form of the remaining phase affects the morphology of the corroded surface that relatively complete dissolution with homogeneous microstructure makes the sample more effective to obtain uniform corrosion form. The optimum temperature for solution treatment is 490 °C, which shows a much better corrosion resistance and uniform corrosion form after soaking for a long time.

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“…Erinc [10] suggested that available Mg alloys for biodegradable implants application should achieved the following properties: 1) the corrosion rate in simulated body fluid (SBF) needs to be < 0.5 mm/year (mm/yr); 2) the yield strength (YS) > 200 MPa and the elongation (EL) > 15%. To affect the mechanical properties and corrosion resistance of pure magnesium, alloying and heat treatments are the most effective and inexpensive methods [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…Researchers also showed a wide interest in the effects of heat treatment on magnesium alloys. Janbozorgi et al [11] studied the mechanical and corrosion properties of Mg-2Zn-1Gd-1Ca (wt.%) of as-cast and different heat-treated conditions and found that precipitations improved the ultimate shear strength up to 32%, due to the aging treatment. Prabhu et al.…”

mentioning

confidence: 99%

Characterization and Properties of Mg-xGd-1.5Nd-0.5Zn-0.5Zr Alloys for Biodegradation Applications

2020

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The differences in microstructural characteristics, mechanical properties, and corrosion behavior of the as-cast and solution-treated Mg-xGd-1.5Nd-0.5Zn-0.5Zr alloys (Mg-xGd, x = 1, 3, and 5) were studied and discussed. The as-cast Mg-xGd alloys mainly consisted of an α-Mg and island-like eutectic (Mg,Zn)3RE phase, a few cuboidal phases (REH2), and a ZnZr phase. With the increase of Gd content, the grain sizes of the as-cast Mg-xGd alloys decreased. Compared to the microstructure of the as-cast Mg-xGd alloys, the eutectic (Mg,Zn)3RE phase disappeared and the cuboidal REH2 phases existed in the solution-treated Mg-xGd alloys. A large amount of ZnZrx phase was precipitated from α-Mg in the Mg-3Gd alloy and demonstrates a flower-like distribution. The ultimate tensile strength (UTS) and yield strength (YS) of the solution-treated Mg-xGd alloys increased with an increasing Gd content, with the UTS and YS of the Mg-5Gd alloys reaching 217.5 and 125.2 MPa, respectively. Immersion and electrochemical tests showed that the as-cast Mg-3Gd alloy presented the best corrosion resistance with a corrosion rate of 0.285 mm/yr. The corrosion resistance of the solution-treated Mg-3Gd alloy attained the lowest value (0.973 mm/yr), due to the large quantities of ZnZrx with a flower-like phase distribution, forming series of galvanic couple groups with the α-Mg.

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Microstructural evolution, mechanical properties, and corrosion resistance of a heat-treated Mg alloy for the bio-medical application

Cited by 55 publications

References 34 publications

Insight Into Corrosion of Dental Implants: From Biochemical Mechanisms to Designing Corrosion-Resistant Materials

Insight Into Corrosion of Dental Implants: From Biochemical Mechanisms to Designing Corrosion-Resistant Materials

Enhancing the Corrosion Resistance Performance of Mg-1.8Zn-1.74Gd-0.5Y-0.4Zr Biomaterial via Solution Treatment Process

Characterization and Properties of Mg-xGd-1.5Nd-0.5Zn-0.5Zr Alloys for Biodegradation Applications

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