scholarly journals Bio-corrosion impacts on mechanical integrity of ZM21 Mg for orthopaedic implant application processed by equal channel angular pressing

2021 ◽  
Vol 32 (6) ◽  
Author(s):  
S. Prithivirajan ◽  
Mayur Bapu Nyahale ◽  
Gajanan M. Naik ◽  
S. Narendranath ◽  
Ashwini Prabhu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Equal Channel Angular Pressing ◽  
Processing Condition ◽  
Mg Alloys ◽  
In Vivo Studies ◽  
Orthopaedic Implant ◽  
Electron Backscattered Diffraction ◽  
Mechanical Integrity ◽  
Angular Pressing

AbstractThe mechanical integrity of rolled ZM21 Mg was improved by equal channel angular pressing (ECAP) to function as a potential biodegradable bone screw implant. Electron backscattered diffraction (EBSD) revealed deformed grains of 45 µm observed in rolled ZM21 Mg. They were transformed to equiaxed fine grains of 5.4 µm after 4th pass ECAP. The yield strength of rolled and ECAPed ZM21 Mg alloys were comparable. In contrast, 4th pass ZM21 Mg exhibited relatively higher elongation when compared to rolled sample. The mechanical properties of rolled and ECAPed ZM21 Mg were dependant on both grain refinement and crystallographic texture. The rolled and 4th pass ECAPed tensile samples exhibited nonlinear deterioration of mechanical properties when tested after 7, 14, 21 and 28 days immersion in Hank’s solution. The evaluation signifies that regardless their processing condition, ZM21 Mg alloys are suitable for surgical areas that requires high mechanical strength. In addition, the 4th pass ECAP samples were viable to MG-63 cells proving themselves to be promising candidates for future in vivo studies.

scholarly journals Effects of equal channel angular pressing and heat treatments on the microstructures and mechanical properties of selective laser melted and cast AlSi10Mg alloys

2021 ◽  
Vol 21 (3) ◽  
Author(s):  
Przemysław Snopiński ◽  
Mariusz Król ◽  
Marek Pagáč ◽  
Jana Petrů ◽  
Jiří Hajnyš ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Equal Channel Angular Pressing ◽  
Heat Treatments ◽  
Electron Backscattered Diffraction ◽  
Angular Pressing ◽  
Low Temperature Annealing ◽  
Transmission Electron ◽  
Before And After ◽  
The Impact

AbstractThis study investigated the impact of the equal channel angular pressing (ECAP) combined with heat treatments on the microstructure and mechanical properties of AlSi10Mg alloys fabricated via selective laser melting (SLM) and gravity casting. Special attention was directed towards determining the effect of post-fabrication heat treatments on the microstructural evolution of AlSi10Mg alloy fabricated using two different routes. Three initial alloy conditions were considered prior to ECAP deformation: (1) as-cast in solution treated (T4) condition, (2) SLM in T4 condition, (3) SLM subjected to low-temperature annealing. Light microscopy, transmission electron microscopy, X-ray diffraction line broadening analysis, and electron backscattered diffraction analysis were used to characterize the microstructures before and after ECAP. The results indicated that SLM followed by low-temperature annealing led to superior mechanical properties, relative to the two other conditions. Microscopic analyses revealed that the partial-cellular structure contributed to strong work hardening. This behavior enhanced the material’s strength because of the enhanced accumulation of geometrically necessary dislocations during ECAP deformation.

In vitro and in vivo studies of biodegradable fine grained AZ31 magnesium alloy produced by equal channel angular pressing

2016 ◽  
Vol 59 ◽  
pp. 356-367 ◽  
Author(s):  
B. Ratna Sunil ◽  
T.S. Sampath Kumar ◽  
Uday Chakkingal ◽  
V. Nandakumar ◽  
Mukesh Doble ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Equal Channel Angular Pressing ◽  
Az31 Magnesium Alloy ◽  
In Vivo Studies ◽  
Fine Grained ◽  
Angular Pressing

scholarly journals Analysis of Microstructure and Mechanical Properties Changes in AA1050 Aluminum Subjected to ECAP and KoBo Processes / Analiza Zmian Mikrostruktury I Własności Mechanicznych Aluminium AA1050 Po Procesie ECAP I KoBo

2015 ◽  
Vol 60 (4) ◽  
pp. 3063-3068 ◽  
Author(s):  
R. Bogucki ◽  
K. Sulikowska ◽  
M. Bieda ◽  
P. Ostachowski ◽  
K. Sztwiertnia
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Grain Boundaries ◽  
Equal Channel Angular Pressing ◽  
High Angle ◽  
Electron Backscattered Diffraction ◽  
Deformation Degree ◽  
Angular Pressing ◽  
Ecap Process ◽  
Processed Sample

Analysis of the results of the microstructure and the mechanical properties change in AA1050 aluminum alloy of technical purity processed using ECAP (Equal Channel Angular Pressing) and KoBo deformation methods are presented in the paper.. ECAP process was performed according to Bc scheme in the range from 1 up to 10 passes. Changes of microstructure were analyzed using scanning electrone microscope equipped with electron backscattered diffraction (EBSD) system. Microstructure and fraction of high-angle grain boundaries in KoBo processed samples were similar to those observed in ECAP processed samples after four passes. The most significant microstructure refinement was observed in ECAP processed sample submitted to 10 passes. In ECAP method the systematic increase of mechanical properties was observed along with increase of deformation degree.

scholarly journals In vitro and in vivo studies on pure Mg, Mg–1Ca and Mg–2Sr alloys processed by equal channel angular pressing

2020 ◽  
Vol 2 (1) ◽  
pp. 96-108 ◽  
Author(s):  
Wenting Li ◽  
Yunong Shen ◽  
Jie Shen ◽  
Danni Shen ◽  
Xiao Liu ◽  
...  
Keyword(s):  
Equal Channel Angular Pressing ◽  
In Vivo Studies ◽  
Angular Pressing
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