Microstructure and Mechanical Properties of Severely Deformed Mg-4.5Al-1.0Zn Alloy Processed by Asymmetric Rolling on Ingot and Twin Roll Cast Strip

Luo, Liting; Gong, Xue; Li, Juzi; Kang, Suk Bong; Cho, Jae Hyung

doi:10.1590/1980-5373-mr-2015-0307

Cited by 7 publications

(4 citation statements)

References 14 publications

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“…Mechanical properties of the composite were studied using UTM (Instron-3365). For tensile property evaluation, a 12.5 mm (gauge length) and 3 × 3 mm 2 (ASTM E8) cross-sectioned specimen was used . The specimens were prepared from the cast ingot using EDM wire cutting.…”

Section: Methodsmentioning

confidence: 99%

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In Vitro Degradation and In Vivo Biocompatibility of Strontium-Doped Magnesium Phosphate-Reinforced Magnesium Composites

Dutta

Khan

Prakash

et al. 2022

ACS Biomater. Sci. Eng.

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Magnesium is projected for use as a degradable orthopedic biomaterial. However, its fast degradation in physiological media is considered as a significant challenge for its successful clinical applications. Bioactive reinforcements containing Mg-based composites constitute one of the promising approaches for developing degradable metallic implants because of their adjustable mechanical behaviors, corrosion resistance, and biological response. Strontium is a trace element known for its role in enhancing osteoblast activity. In this study, bioactive SrO-doped magnesium phosphate (MgP)-reinforced Mg composites containing 1, 3, and 5 wt % MgP were developed through the casting route. The influence of the SrO-doped MgP reinforcement on degradation behaviors of the composites along with its cell–material interactions and in vivo biocompatibility was investigated. The wt % and distribution of MgP particles significantly improved the mechanical properties of the composite. HBSS immersion study indicated the least corrosion rate (0.56 ± 0.038 mmpy) for the Mg–3MgP composite. The higher corrosion resistance of Mg–3MgP leads to a controlled release of Sr-containing bioactive reinforcement, which eventually enhanced the cytotoxicity as measured using MG-63 cell–material interactions. The in vivo biocompatibility of the composite was evaluated using the rabbit femur defect model. Micro-computed tomography (μ-CT) and histological analysis supported the fact that Mg–3MgP maintained its structural integrity and enhanced osteogenesis (50.36 ± 2.03%) after 2 months of implantation. The results indicated that the Mg–MgP composite could be used as a degradable internal fracture fixation device material.

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Section: Methodsmentioning

confidence: 99%

“…For tensile property evaluation, a 12.5 mm (gauge length) and 3 × 3 mm 2 (ASTM E8) cross-sectioned specimen was used. 33 The specimens were prepared from the cast ingot using EDM wire cutting. A crosshead speed of 0.5 mm/min was used for this study.…”

Section: Physical and Microstructuralmentioning

confidence: 99%

In Vitro Degradation and In Vivo Biocompatibility of Strontium-Doped Magnesium Phosphate-Reinforced Magnesium Composites

Dutta

Khan

Prakash

et al. 2022

ACS Biomater. Sci. Eng.

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“…It is turns out that the heat transfer efficiency of vertical-type twin roll casting (VTRC) is higher than that of horizontal double roll casting (HTRC), and the cooling speed of VTRC is higher [21,22]. The rapid cooling speed of the alloy during the TRC process is beneficial for reducing segregation, achieving higher uniformity and expanded solid solubility, refining the microstructure characteristics [23]. It enables better utilization to be made of a variety of transition elements that have limited solid solubilities in magnesium alloy, to improve mechanical and chemical properties [24].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Mg-RE Alloy Sheets and Formation of Amorphous/Crystalline Composites by Twin Roll Casting for Biomedical Implant Application

Wang

2019

Metals

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A new type of Mg-based metallic glass has attracted extensive attention due to its excellent corrosion resistance and favorable biocompatibility. In this study, an amorphous/crystalline composite Mg-RE alloy sheet was prepared by a vertical type twin roll caster (VTRC) method, and its microstructure was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and electron probe micro-analysis (EPMA) and transmission electron microscopy (TEM); furthermore, the corrosion behaviors of the Mg-RE alloy sheet were investigated in PBS solution using electrochemical techniques and immersion testing in a simulated physiological condition. Furthermore, it was implanted into the femur of rats to explore its prospect as biological transplantation material. Its microscopic characterization experiments show that the crystal structure is crystalline phase containing amorphous phase. Electrochemical experiments and immersion testing both showed that Mg-RE(La,Ce) sheet with VTRC has a better corrosion resistance than master alloy, and a uniform corrosion layer on the surface. In vivo, as an implant material, tests show that Mg-RE alloy sheets have better biocompatibility and induce new bone formation, and they can be expected to be utilized as implant materials in the future.

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“…Twin roll casting (TRC) is an established cost-effective production method offering the possibility to fabricate wrought Mg (semi-) products for many weight-sensitive applications. The relatively fast solidification rate of the alloy during TRC has beneficial effects on the resultant microstructure such as reducing segregation, refining microstructural features, attaining higher homogeneity and extending solid solubility [ 2 ]. It enables better utilization of alloying elements having limited solid solubility in Mg, such as a variety of transition elements, to improve mechanical properties [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Microstructure Evolution and Deformation Mechanisms of a Mg-Zn-Zr-RE Twin-Roll-Cast Magnesium Sheet by In-Situ Experimental Techniques

et al. 2018

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Twin roll casting (TRC), with a relatively fast solidification rate, is an excellent production method with promising potential for producing wrought semi or final Mg alloy products that can often suffer from poor formability. We investigate in this study the effect of the TRC method and the subsequent heat treatment on the microstructure and deformation mechanisms in Mg-Zn-Zr-Nd alloy deformed at room temperature using the in-situ neutron diffraction and acoustic emission techniques and ex-situ texture measurement and microscopy, respectively. Although a higher work hardening is observed in the rolling direction due to the more intensive -type dislocation activity, the difference in the mechanical properties of the specimens deformed in the RD and TD directions is small in the as-rolled condition. An additional heat treatment results in recrystallization and significant anisotropy in the deformation. Due to the easier activation of the extension twinning in the TD given by texture, the yield stress in the TD is approximately 40% lower than that in the RD.

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Microstructure and Mechanical Properties of Severely Deformed Mg-4.5Al-1.0Zn Alloy Processed by Asymmetric Rolling on Ingot and Twin Roll Cast Strip

Cited by 7 publications

References 14 publications

In Vitro Degradation and In Vivo Biocompatibility of Strontium-Doped Magnesium Phosphate-Reinforced Magnesium Composites

In Vitro Degradation and In Vivo Biocompatibility of Strontium-Doped Magnesium Phosphate-Reinforced Magnesium Composites

Preparation and Characterization of Mg-RE Alloy Sheets and Formation of Amorphous/Crystalline Composites by Twin Roll Casting for Biomedical Implant Application

Investigation of the Microstructure Evolution and Deformation Mechanisms of a Mg-Zn-Zr-RE Twin-Roll-Cast Magnesium Sheet by In-Situ Experimental Techniques

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