Influence of Equal Channel Angular Processing and Rotary Swaging on the Mechanical and Degradation Properties of WE43 Mg Alloy

Mg-alloy has possibility to be used as biodegradable biomaterial. The main problem in application of this material is high degradation rate. The aim of this research is to study the mechanical, morphology and the degradation properties of Mg-alloy biodegradable by variation of sintering temperature of 500 °C, 550 °C, and 600 °C. Morphology was investigated using SEM-EDX. Phase identification was carried out by XRD and mechanical qualities test was measured by compressive and hardness test. Degradation rate test was assessed by weight loss test. The outcomes show that Mg–Zn– Cu sample with sintering temperature 600 °C is the optimum result. The compressive strength is 175,14 MPa, the hardness value is 410,59 MPa, and degradation rate is 8,57 cm/year.

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In Vitro Degradation of Ultrafine Grained Mg-Zn-Ca Alloy by High-Pressure Torsion in Simulated Body Fluid

Materials Science Forum ◽

10.4028/www.scientific.net/msf.706-709.504 ◽

2012 ◽

Vol 706-709 ◽

pp. 504-509 ◽

Cited By ~ 2

Author(s):

Shao Kang Guan ◽

Zhen Wei Ren ◽

Jun Heng Gao ◽

Yu Feng Sun ◽

Shi Jie Zhu ◽

...

Keyword(s):

High Pressure ◽

Simulated Body Fluid ◽

Body Fluid ◽

High Pressure Torsion ◽

Cast Alloy ◽

Mg Alloy ◽

Second Phase ◽

Ultrafine Grained ◽

Degradation Properties

In this paper the in vitro degradation of ultrafine grained (UFG) Mg-Zn-Ca alloy produced by HPT was investigated by electrochemical measurements and immersion tests in SBF. It was found that UFG Mg alloy had better degradation properties and also higher microhardness value than as-cast Mg alloy. The corrosion current density of UFG Mg alloy decreased by about two orders of magnitude, compared with that of as-cast alloy. Through electrochemical impedance spectroscopy (EIS) test，UFG Mg alloy showed a higher charge transfer resistance value. In immersion test, UFG Mg alloy in SBF exhibited more uniform corrosion and lower degradation rate (0.0763 mm/yr) than as-cast alloy. The degradation properties were related with the microstructure evolution, namely the grain refinement and redistribution of second phase. Keywords: Mg-Zn-Ca alloy; High-pressure torsion (HPT); Degradation behavior; Simulated body fluid (SBF); Microhardness

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Effect of Ni addition on the mechanical and degradation properties of hollow glass microsphere/Mg alloy composites

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2020.157125 ◽

2021 ◽

Vol 853 ◽

pp. 157125

Author(s):

Lin Liu ◽

Sirong Yu ◽

Enyang Liu ◽

Yan Zhao ◽

Bingying Wang ◽

...

Keyword(s):

Glass Microsphere ◽

Mg Alloy ◽

Hollow Glass Microsphere ◽

Hollow Glass ◽

Ni Addition ◽

Degradation Properties

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Effect of original grain size on microstructure and properties of extruded Mg-2Zn-0.2Mn biomedical alloy

Integrated Ferroelectrics ◽

10.1080/10584587.2017.1331418 ◽

2019 ◽

Vol 201 (1) ◽

pp. 231-240

Author(s):

Zhou shijie ◽

Liu hengquan ◽

Huang nan

Keyword(s):

Mechanical Properties ◽

Grain Size ◽

Magnesium Alloy ◽

Cooling Rate ◽

Processing Condition ◽

Mg Alloy ◽

Cast Ingot ◽

Dynamic Recrystallisation ◽

Cast Magnesium ◽

Degradation Properties

Magnesium is a biocompatible and biodegradable metal, which has attracted much interest in biomedical engineering. Cast magnesium alloy shows the low strength and plasticity at ambient temperature. Microstructure, mechanical properties and degradation properties of the extrusion pressed magnesium alloy have been investigated for biomedical application in detail by optical microscopes, mechanical properties testing and corrosion testing. The magnesium alloy ingots were gained by different cooling rate. Then the ingots were extrude into bar at the same processing condition. The results show that the cooling rate of cast ingot is important factors that affect the properties of Mg alloy by dynamic recrystallisation extruding. The cooling rate of cast ingot has been successfully applied to control the microstructure, mechanical and degradation properties of the Mg alloy. Optical microscopy observation has indicated that the grain size of the dynamic recrystallisation extruding has been significantly decreased from fast cooling cast magnesium ingot, which has mainly contributed to the high tensile strength and good elongation. Fasting cooling rate of cast ingot and dynamic recrystallisation extruding has provided moderate corrosion resistance, which has opened a new window for materials design, especially for biomedical.

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Nanocrystallization of the cast AZ31 Mg alloy by low-strain rotary swaging

Materials Letters ◽

10.1016/j.matlet.2021.130995 ◽

2021 ◽

pp. 130995

Author(s):

Xin Chen ◽

Chuming Liu ◽

Shunong Jiang ◽

Yingchun Wan

Keyword(s):

Mg Alloy ◽

Rotary Swaging ◽

Az31 Mg Alloy

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Interfacial microstructure and mechanical properties of Al alloy /Mg alloy laminated composite plates fabricated by equal channel angular processing

Journal of Wuhan University of Technology-Mater Sci Ed ◽

10.1007/s11595-016-1385-9 ◽

2016 ◽

Vol 31 (2) ◽

pp. 417-421 ◽

Cited By ~ 3

Author(s):

Guorui Li ◽

Dong Zhao ◽

Yaojiang Zhao ◽

Bin Zhou ◽

Hongxia Wang

Keyword(s):

Mechanical Properties ◽

Laminated Composite ◽

Composite Plates ◽

Interfacial Microstructure ◽

Mg Alloy ◽

Al Alloy ◽

Laminated Composite Plates ◽

Equal Channel Angular Processing ◽

Microstructure And Mechanical Properties

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Lattice imaging of precipitates in Al-Zn-Mg alloy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100143651 ◽

1986 ◽

Vol 44 ◽

pp. 412-413

Author(s):

C. K. Wu

Keyword(s):

Grain Boundaries ◽

Homogeneous Nucleation ◽

Alloy System ◽

Mg Alloy ◽

List Type ◽

Lattice Structures ◽

Type Number ◽

Orientation Relationships ◽

Lattice Imaging ◽

The Matrix

The precipitation phenomenon in Al-Zn-Mg alloy is quite interesting and complicated and can be described in the following categories:(i) heterogeneous nucleation at grain boundaries;(ii) precipitate-free-zones (PFZ) adjacent to the grain boundaries;(iii) homogeneous nucleation of snherical G.P. zones, n' and n phases inside the grains. The spherical G.P. zones are coherent with the matrix, whereas the n' and n phases are incoherent. It is noticed that n' and n phases exhibit plate-like morpholoay with several orientation relationship with the matrix. The high resolution lattice imaging techninue of TEM is then applied to study precipitates in this alloy system. It reveals the characteristics of lattice structures of each phase and the orientation relationships with the matrix.

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