Synergistic effect of Mg addition and hydrostatic extrusion on microstructure and texture of biodegradable low-alloyed zinc

Jarzębska, Anna; Bieda, M.; Kawałko, Jakub; Koprowski, P.; Rogal, Łukasz; Chulist, R.; Kania, B.; Sztwiertnia, K.; Pachla, W.; Kulczyk, Mariusz

doi:10.1088/1757-899x/375/1/012008

Cited by 8 publications

(4 citation statements)

References 11 publications

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“…The effect of multi-pass hydrostatic extrusion preceded by hot extrusion and the addition of Mg on the microstructure evolution of Zn was examined in this work. It has already been reported in our previous works, [20,21] and is demonstrated well in the present one, that the hydrostatic extrusion process contributes to great grain refinement of low-alloyed zinc, which is responsible for an improvement of mechanical properties. However, more homogeneous microstructure providing uniform mechanical properties throughout the entire extruded material was obtained when the hydrostatic extrusion process was preceded by hot extrusion as compared to the Zn-1Mg alloy in as-cast state.…”

Section: Discussionsupporting

confidence: 87%

“…Overall, these results show that the application of multi-pass hydrostatic extrusion instead of one operation is more beneficial for better grain refinement, greater elongation and suppression of the recrystallization processes. [21] The mechanical properties of the Zn-1Mg alloy subjected to multi-pass hydrostatic extrusion are a direct result of the microstructure and texture formed during plastic deformation. Significant grain refinement caused the Zn-1Mg alloy to have the highest strength among all of the investigated materials.…”

Section: Discussionmentioning

confidence: 99%

“…However, more homogeneous microstructure providing uniform mechanical properties throughout the entire extruded material was obtained when the hydrostatic extrusion process was preceded by hot extrusion as compared to the Zn-1Mg alloy in as-cast state. [21] Achievement of significant grain refinement of Zn, which results in the increase in its strength and plasticity, may be possible only by the combination of Mg addition and hydrostatic extrusion. Using either of these operations individually does not improve the mechanical properties sufficiently to fulfil requirements for biodegradable stents.…”

Section: Discussionmentioning

confidence: 99%

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Controlled Grain Refinement of Biodegradable Zn-Mg Alloy: The Effect of Magnesium Alloying and Multi-Pass Hydrostatic Extrusion Preceded by Hot Extrusion

Jarzębska

Bieda

Maj

et al. 2020

Metall Mater Trans A

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To satisfy the most stringent criteria in terms of new cardiovascular stents, pure Zn was alloyed with 1 wt pct of Mg and subsequently subjected to plastic deformation, using conventional hot extrusion followed by multi-pass hydrostatic extrusion. A detailed microstructural and textural characterization of the obtained materials was conducted, and mechanical properties were assessed at each pass of deformation process. In contrast to pure Zn, hydrostatically extruded low-alloyed Zn is characterized by a remarkable increase in strength and ductility (YS = 383 MPa, E = 23 pct), exceeding the values needed for stents. Such behavior is associated with a dual microstructure containing fine-grained Zn, alternatively arranged with bands of a fragmented eutectic. Extensive grain refinement was achieved due to the process of continuous dynamic recrystallization. Hydrostatic extrusion changes the initial $$ \langle 10\bar{1}0\rangle $$ ⟨ 10 1 ¯ 0 ⟩ fiber texture to a 〈0002〉 and $$ \langle 10\bar{1}1\rangle $$ ⟨ 10 1 ¯ 1 ⟩ double fiber texture in which the 〈0002〉 component decreases with each pass of hydrostatic extrusion. The gradual evolution of texture components was simulated using a visco-plastic self-consistent model, which confirmed that, during hydrostatic extrusion, secondary slip systems were activated involving mostly the pyramidal one.

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Controlled Grain Refinement of Biodegradable Zn-Mg Alloy: The Effect of Magnesium Alloying and Multi-Pass Hydrostatic Extrusion Preceded by Hot Extrusion

Jarzębska

Bieda

Maj

et al. 2020

Metall Mater Trans A

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“…Magnesium (Mg) has been used as an alloying element in many studies due to its well-known biocompatibility and a positive effect on the mechanical strength of Zn. Previous studies on Zn-Mg alloys demonstrated that increasing the Mg content consistently increases the tensile strength at the expense of the ductility due to the higher volume fraction of Mg 2 Zn 11 intermetallic [5,[12][13][14][15]. Recently, Zn-Mg alloys with Mg content below 0.1 wt.% were formulated to preserve zinc ductility [12,[16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

The effects of alloying with Cu and Mn and thermal treatments on the mechanical instability of Zn-0.05Mg alloy

Ardakani

Mostaed

Sikora-Jasinska

et al. 2020

Materials Science and Engineering: A

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The detrimental effect of natural aging on mechanical properties of zinc alloys restricts their application as bioresorbable medical implants. In this study, aging of Zn-0.05Mg alloy and the effect of 0.5 Cu and 0.1 Mn (in weight percent) addition on the microstructure and tensile properties were studied. The alloys were cold rolled, aged and annealed; aiming to investigate the effects of precipitates and grain size on the mechanical properties and their stability. TEM analysis revealed that in ultrafine-grained binary Zn-0.05Mg alloy, the natural aging occurred due to the formation of nano-sized Mg 2 Zn 11 precipitates. After 90 days of natural aging, the yield strength and ultimate tensile strength of Zn-0.05Mg alloy increased from 197±4 MPa and 227±5 MPa to 233±8 MPa and 305±7 MPa, respectively, while the elongation was drastically reduced from 34±3% to 3±1%. This natural aging was retarded by adding the third element at either 0.1Mn or 0.5Cu quantities, which interacted with Mg in Zn solid solution and impeded the formation of Mg 2 Zn 11 precipitates. The addition of Cu and Mn elements increased alloy's strength, ductility, and its mechanical stability at a room temperature. The measured tensile strength and elongation were 274±5 MPa and 41±1% for Zn-0.1Mn-0.05Mg and 312±2 MPa and 44±2% for Zn-0.5Cu-0.05Mg, respectively. Annealing the alloys at elevated temperatures caused increase in both grain size and dissolution of secondary phases, and both affected alloy deformation mechanisms.

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Texture-Based Optimization of Crystal Plasticity Parameters: Application to Zinc and Its Alloy

Frydrych

Jarzębska

Virupakshi

et al. 2021

Metall Mater Trans A

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Evolutionary algorithms have become an extensively used tool for identification of crystal plasticity parameters of hexagonal close packed metals and alloys. However, the fitness functions were usually built using the experimentally measured stress–strain curves. Here, the fitness function is built by means of numerical comparison of the simulated and experimental textures. Namely, the normalized texture difference index is minimized. The evolutionary algorithm with the newly developed fitness function is tested by performing crystal plasticity parameter optimization for both pure zinc and zinc-magnesium alloy. These materials are promising candidates for bioabsorbable implants due to good biocompatibility and optimal corrosion rate. Although their mechanical properties in the as-cast state do not fulfill the requirements, they can be increased by means of hydrostatic extrusion. The developed modeling approach enabled acquisition of the crystal plasticity parameters and analysis of the active deformation mechanisms in zinc and zinc-magnesium alloy subjected to hydrostatic extrusion. It was shown that although slip systems are the main deformation carrier, compressive twinning plays an important role in texture evolution. However, the texture is also partially affected by dynamic recrystallization which is not considered within the developed framework.

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Synergistic effect of Mg addition and hydrostatic extrusion on microstructure and texture of biodegradable low-alloyed zinc

Cited by 8 publications

References 11 publications

Controlled Grain Refinement of Biodegradable Zn-Mg Alloy: The Effect of Magnesium Alloying and Multi-Pass Hydrostatic Extrusion Preceded by Hot Extrusion

Controlled Grain Refinement of Biodegradable Zn-Mg Alloy: The Effect of Magnesium Alloying and Multi-Pass Hydrostatic Extrusion Preceded by Hot Extrusion

The effects of alloying with Cu and Mn and thermal treatments on the mechanical instability of Zn-0.05Mg alloy

Texture-Based Optimization of Crystal Plasticity Parameters: Application to Zinc and Its Alloy

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