Microstructure and mechanical properties of Mg–Zn–RE–Zr alloy after thixoforming

Rogal, Łukasz; Kania, Adrianna; Berent, Katarzyna; Janus, Karol.; Lityńska‐Dobrzyńska, Lidia

doi:10.1016/j.jmrt.2018.09.002

Cited by 18 publications

(8 citation statements)

References 22 publications

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“…The EDX mappings document a high Zn concentration, moderate concentrations of Zr and Nd and almost no Mg in the (Mg,Zn) 12 RE particles (Figure 3c-e). Similar precipitates were reported in the literature, after different annealing temperatures and times [5] with higher concentrations of RE [3].…”

Section: Resultssupporting

confidence: 89%

“…They are the main source of precipitation hardening and creep resistance [7], as the main dislocation slip systems in hexagonal Mg are microscopic crystallographic slip systems of type {0001} <1,1,−2,0> (basal slip). Some authors suggest [3] that in EZ33A the needle shaped particles represent an intermediate β' 1 phase, which precedes the formation of the lath-shaped β' 2 phase, which was detected in super saturated Mg-Zn and Mg-Zn-RE alloys [8,9]. Based on our EDX mapping results, we suggest that segregation of Zr to the (0001) planes in the α(Mg) hampers the formation of the β' 1 phase in EZ33A and instead promotes the direct formation of the β' 2 lathes.…”

Section: Resultsmentioning

confidence: 99%

“…Unfortunately, they possess low ductility due to brittle intermetallic precipitates which nucleate and grow on grain boundaries (GBs). Many recent investigations [1][2][3] aim at increasing the ductility of Mg-Zn alloys, by exploring different thermomechanical treatments to reduce cracking.…”

Section: Introductionmentioning

confidence: 99%

“…The as-cast EZ33A alloy (Figure 1a) has a polycrystalline dendritic structure with a second phase occupying 75% of the GBs and regions in the α(Mg) grain interiors with nanoprecipitates. According to literature, this second phase represents a (Mg,Zn) 12 RE intermetallic compound [1][2][3], which has a high hardness and strength. It increases the overall strength of the alloy, especially its creep resistance, by slowing down GB mobility [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…It increases the overall strength of the alloy, especially its creep resistance, by slowing down GB mobility [5,6]. The precipitation in the α(Mg) grain interior results from an increased Zr concentration (saturation) in this region [2,3]. The Zr-saturated areas appear medium-grey in Figure 1a.…”

Section: Introductionmentioning

confidence: 99%

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Bulk and Surface Low Temperature Phase Transitions in the Mg-Alloy EZ33A

Страумал

Mazilkin

Tzoy

et al. 2020

Metals

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Low-temperature phase transitions in the EZ33A Mg-cast alloy have been investigated. Based on the structure assessment of the alloy after annealing at 150 °C (1826 h) and at 200 °C (2371 h) a grain boundary wetting transition by a second solid phase was documented. Within a 50 °C temperature range, substantial differences in the α(Mg) grain boundary fraction wetted by the (Mg,Zn)12RE intermetallic were observed. In contrast to what was reported in the literature, two different types of precipitates were found within α(Mg) grains. With increasing annealing temperatures, both types of precipitates dissolved.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Bulk and Surface Low Temperature Phase Transitions in the Mg-Alloy EZ33A

Страумал

Mazilkin

Tzoy

et al. 2020

Metals

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In vitro and in vivo degradation assessment and preventive measures of biodegradable Mg alloys for biomedical applications

Jana

Das

Balla

2021

J Biomedical Materials Res

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Magnesium (Mg) and its alloys have been widely explored as a potential biodegradable implant material. However, the fast degradation of Mg‐based alloys under physiological environment has hindered their widespread use for implant applications till date. The present review focuses on in vitro and in vivo degradation of biodegradable Mg alloys, and preventive measures for biomedical applications. Initially, the corrosion assessment approaches to predict the degradation behavior of Mg alloys are discussed along with the measures to control rapid corrosion. Furthermore, this review attempts to explore the correlation between in vitro and in vivo corrosion behavior of different Mg alloys. It was found that the corrosion depends on experimental conditions, materials and the results of different assessment procedures hardly matches with each other. It has been demonstrated the corrosion rate of magnesium can be tailored by alloying elements, surface treatments and heat treatments. Various researches also studied different biocompatible coatings such as dicalcium phosphate dihydrate (DCPD), β‐tricalcium phosphate (β‐TCP), hydroxyapatite (HA), polycaprolactone (PCL), polylactic acid (PLA), and so on, on Mg alloys to suppress rapid degradation and examine their influence on new bone regeneration as well. This review shows the need for a standard method of corrosion assessment to predict the in vivo corrosion rate based on in vitro data, and thus reducing the in vivo experimentation.

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Study on Microstructural Evolution and GP Zone Strengthening Mechanism by Solution and Aging Treatment in Non-dendritic Mg-6Zn-5Al Magnesium Alloy

Zhang,

Niu,

et al. 2024

JOM

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Microstructure and mechanical properties of Mg–Zn–RE–Zr alloy after thixoforming

Cited by 18 publications

References 22 publications

Bulk and Surface Low Temperature Phase Transitions in the Mg-Alloy EZ33A

Bulk and Surface Low Temperature Phase Transitions in the Mg-Alloy EZ33A

In vitro and in vivo degradation assessment and preventive measures of biodegradable Mg alloys for biomedical applications

Study on Microstructural Evolution and GP Zone Strengthening Mechanism by Solution and Aging Treatment in Non-dendritic Mg-6Zn-5Al Magnesium Alloy

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