The deformation behavior of AZ31 Mg alloy with surface mechanical attrition treatment

Meng, Xianghai; Duan, Meng; Li, Luo; Zhan, Duochan; Jin, Bin; Jin, Yuhai; Rao, Xixin; Liu, Yong; Lü, Jian

doi:10.1016/j.msea.2017.09.094

Cited by 65 publications

(21 citation statements)

References 51 publications

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“…Although SMAT is a surface treatment technology, a gradient distribution from several nanometers to a few micrometers is formed on the surface layer of the treated samples, contributing to dramatic improvement in the mechanical properties in both inert metals96 and biodegradable Mg alloys97 with deep treated depth. Therefore, SMAT is considered as a promising strategy to enhance the mechanical strength of Mg based alloys when used as potential orthopedic implants.…”

Section: Novel Strategies For Modifying Mg‐based Orthopedic Implantsmentioning

confidence: 99%

Biodegradable Magnesium‐Based Implants in Orthopedics—A General Review and Perspectives

et al. 2020

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Biodegradable Mg‐based metals may be promising orthopedic implants for treating challenging bone diseases, attributed to their desirable mechanical and osteopromotive properties. This Review summarizes the current status and future research trends for Mg‐based orthopedic implants. First, the properties between Mg‐based implants and traditional orthopedic implants are compared on the following aspects: in vitro and in vivo degradation mechanisms of Mg‐based implants, peri‐implant bone responses, the fate of the degradation products, and the cellular and molecular mechanisms underlying the beneficial effects of Mg ions on osteogenesis. Then, the preclinical studies conducted at the low weight bearing sites of animals are introduced. The innovative strategies (for example, via designing Mg‐containing hybrid systems) are discussed to address the limitations of Mg‐based metals prior to their clinical applications at weight‐bearing sites. Finally, the available clinical studies are summarized and the challenges and perspectives of Mg‐based orthopedic implants are discussed. Taken together, the progress made on the development of Mg‐based implants in basic, translational, and clinical research has laid down a foundation for developing a new era in the treatment of challenging and prevalent bone diseases.

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Section: Novel Strategies For Modifying Mg‐based Orthopedic Implantsmentioning

confidence: 99%

Biodegradable Magnesium‐Based Implants in Orthopedics—A General Review and Perspectives

et al. 2020

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“…It should be noted that the mean positron lifetime calculated as a weighted average of these two components is equal to 230 ps, which is definitely lower than the mean positron lifetime at the SMATed surface even for only 60 s SMAT duration, indicating a lower defect density. According to Sun et al, in comparison to other severe plastic deformation processes, such as HPT or ECAP, the strain rate in SMAT is much higher, which leads to obtaining smaller refined grains [ 98 , 99 ]. As it was shown by Okhubo et al, the strain rate can also influence the generated crystal lattice defects [ 100 ].…”

Section: Resultsmentioning

confidence: 99%

Gradient Microstructure Induced by Surface Mechanical Attrition Treatment (SMAT) in Magnesium Studied Using Positron Annihilation Spectroscopy and Complementary Methods

et al. 2020

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Surface mechanical attrition treatment (SMAT) was used to generate a gradient microstructure in commercial grade magnesium. Positron annihilation lifetime spectroscopy and variable energy positron beam measurements, as well as microhardness tests, electron backscatter diffraction, X-ray diffraction, and electrochemical corrosion tests, were used to investigate the created subsurface microstructure and its properties. It was found that SMAT causes an increase in dislocation density and grain refinement which results in increased hardness of the subsurface zone. The mean positron lifetime values indicate trapping of positrons in vacancies associated with dislocations and dislocation jogs. The increase of the SMAT duration and the vibration amplitude influences the depth profile of the mean positron lifetime, which reflects the defect concentration profile. Electrochemical measurements revealed that the structure induced by SMAT increases the susceptibility of magnesium to anodic oxidation, leading to the enhanced formation of hydroxide coverage at the surface and, as a consequence, to the decrease in corrosion current. No significant effect of the treatment on the residual stress was found.

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“…Surface mechanical attrition treatment (SMAT) is one of the severe plastic deformation methods which can refine the grain size of treated metal surface to nanoscale. Meanwhile, the grain refinement and the interaction of dislocations after SMAT will bring about an improvement in the mechanical properties [ 235 ]. In addition, the increased surface roughness as well as high density of crystalline defects and micro cracks will impair the corrosion resistance of treated alloys, resulting in accelerated degradation behavior [ 236 , 237 ].…”

Section: Perspectives On the Future Surface Modification Strategies Of Zn-based Bmsmentioning

confidence: 99%

A review on current research status of the surface modification of Zn-based biodegradable metals

Yuan

Xia

et al. 2022

Bioactive Materials

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Recently, zinc and its alloys have been proposed as promising candidates for biodegradable metals (BMs), owning to their preferable corrosion behavior and acceptable biocompatibility in cardiovascular, bone and gastrointestinal environments, together with Mg-based and Fe-based BMs. However, there is the desire for surface treatment for Zn-based BMs to better control their biodegradation behavior. Firstly, the implantation of some Zn-based BMs in cardiovascular environment exhibited intimal activation with mild inflammation. Secondly, for orthopedic applications, the biodegradation rates of Zn-based BMs are relatively slow, resulting in a long-term retention after fulfilling their mission. Meanwhile, excessive Zn 2+ release during degradation will cause in vitro cytotoxicity and in vivo delayed osseointegration. In this review, we firstly summarized the current surface modification methods of Zn-based alloys for the industrial applications. Then we comprehensively summarized the recent progress of biomedical bulk Zn-based BMs as well as the corresponding surface modification strategies. Last but not least, the future perspectives towards the design of surface bio-functionalized coatings on Zn-based BMs for orthopedic and cardiovascular applications were also briefly proposed.

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The deformation behavior of AZ31 Mg alloy with surface mechanical attrition treatment

Cited by 65 publications

References 51 publications

Biodegradable Magnesium‐Based Implants in Orthopedics—A General Review and Perspectives

Biodegradable Magnesium‐Based Implants in Orthopedics—A General Review and Perspectives

Gradient Microstructure Induced by Surface Mechanical Attrition Treatment (SMAT) in Magnesium Studied Using Positron Annihilation Spectroscopy and Complementary Methods

A review on current research status of the surface modification of Zn-based biodegradable metals

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