Comparison of the effects of La- and Ce-rich rare earth additions on the microstructure, creep resistance, and high-temperature mechanical properties of Mg–6Zn–3Cu cast alloy

Golmakaniyoon, Sahar; Mahmudi, R.

doi:10.1016/j.msea.2011.03.083

Cited by 33 publications

(21 citation statements)

References 28 publications

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“…In last decade, Mg has been alloyed with various RE elements to develop new Mg alloys with better mechanical properties, formability and creep resistance at high temperatures [6,[120][121][122][123][124][125]. The oxidation resistance of Mg alloys may also be enhanced by alloying with RE elements [126][127][128].…”

Section: Re Elementsmentioning

confidence: 99%

Oxidation of magnesium alloys at elevated temperatures in air: A review

et al. 2016

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Highlights The oxidation behaviours of Mg alloys from low to high temperatures are reviewed. Characteristics of MgO during oxidation is discussed. Mechanisms of Mg oxidation is presented. Effect of various alloying elements is analysed. AbstractThis paper reviews (i) the oxidation of Mg alloys at elevated temperatures in air; (ii) the influence of alloying elements on the oxidation of Mg alloys; and (iii) the progress in the development of oxidation-resistant Mg alloys. Low oxidation rates have been shown by Mg alloys containing the alloying elements, Ca, Be and rare earth elements. However, these alloying elements may also decrease mechanical properties, such as ductility.

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Section: Re Elementsmentioning

confidence: 99%

Oxidation of magnesium alloys at elevated temperatures in air: A review

et al. 2016

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“…This is evident from the lower levels and slopes of the creep curves of ZC63-1RE (Ce), as compared to other materials. This phenomenon can be explained on the basis of the microstructures and phase constituents of the investigated alloys, as discussed by the authors elsewhere [14]. In order to have an evaluation of the effect of aging treatment on the creep resistance of the materials, their logarithmic minimum creep rates are plotted under different constant stress levels at 423 and 473 K, in three dimensional plots shown in Fig.…”

Section: Creep Behavior and Mechanical Propertiesmentioning

confidence: 97%

“…RE (La) and RE (Ce) represented, respectively, the lanthanum-rich and cerium-rich misch-metals, the chemical composition of which is given in Table 1. The details of melting, alloying, and casting processes have been described elsewhere [14]. The cast slabs with the dimensions of 12 mm Â 20 mm Â 180 mm were cut into slices of 3 mm Â 12 mm Â 20 mm using an electrodischarge wire-cut machine for structural characterization, impression creep and mechanical testing.…”

Section: Materials and Processingmentioning

confidence: 99%

“…It was demonstrated that RE addition up to 1 wt%, significantly increases high temperature mechanical properties of the alloy by the formation of thermally stable Mg 12 RE and MgRE compounds [12]. Recently, the effect of La-and Ce-rich misch-metal addition on the creep resistance [13] and mechanical properties [14] of the cast ZC63 alloy has been investigated. It has been shown that RE-containing alloys exhibit enhanced creep resistance, mainly due to the formation of a grain boundary network of thermally stable phases, which can effectively inhibit grain boundary migration and sliding during the creep process [13].…”

Section: Introductionmentioning

confidence: 99%

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Effect of aging treatment on the microstructure, creep resistance and high-temperature mechanical properties of Mg–6Zn–3Cu alloy with La- and Ce-rich rare earth additions

Golmakaniyoon

Mahmudi

2015

Materials Science and Engineering: A

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“…The increase in particulate shape may due to the increase of Ce element addition in the alloy even though there is still lack of understanding on how various RE elements interact with each other on the basis of their relative amount [16]. Moving down, as more and more Ce are added into the alloy, we could observe a trend, with the increment of the particulate shape in the intermetallic phases as shown in Figure 10(e), (f), (g) and (h).…”

Section: The Samples Was Observed Under the Scanning Electron Microscmentioning

confidence: 99%

Microstructure control of Mg alloy for structural component application

Zulkafli¹

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Mg-Al based alloys have been widely used for structural alloy and components especially in automotive industry because of its low density, great castability and their high corrosion resistance.However, Mg-Al based alloy are prone to creep deformation thus their application is limited at low temperature environment. Recent studies shows that the creep resistance could be enhanced by the addition of rare earth element (La and Ce) into the Mg-Al based alloy. The addition of rare earth element cause the formation of preferential intermetallic phase Al11RE3 and Al2RE phase in the microstructure which are believed have higher thermal stability at elevated temperature. The addition of RE also cause suppression of typical Mg17Al11 phase in Mg-Al-type alloy which are known for its low thermal stability. This project would be interested to investigate the formation of these phases and their effect to the microstructure with various different composition of La and Ce to be added into Mg-Al alloy. The as cast microstructure are then analyzed with Scanning Electron Microscope (SEM) and their chemical composition were determined by EDS Mapping.From the result obtained through SEM micrograph and EDS, the effect of modifying the RE content into the Mg-Al based alloy shows significant changes to the microstructures and morphologies of the intermetallic phases. The increase of Ce concentration resulted in the intermetallic eutectic phase, Al11RE3 to become much finer. Besides that, a small increase of Ce addition leads to a large changes in intermetallic Al2RE phase. From the result, the particulate phase increase in particle size and volume fraction throughout the microstructure. However, this phenomenon does not prove that a larger size and volume fraction leads to a better creep resistance because further research need to be done to investigate their performance at elevated temperature.The addition of RE however cause suppression of Mg17Al12 phase. The result obtained shows no trace of these phases for all the samples. Because of no presence of Mg17Al12, it is believed that the formation of intermetallic Al11RE3 phase and Al2RE phase could possibly improve the creep resistance for Mg-Al based alloy.

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Comparison of the effects of La- and Ce-rich rare earth additions on the microstructure, creep resistance, and high-temperature mechanical properties of Mg–6Zn–3Cu cast alloy

Cited by 33 publications

References 28 publications

Oxidation of magnesium alloys at elevated temperatures in air: A review

Oxidation of magnesium alloys at elevated temperatures in air: A review

Effect of aging treatment on the microstructure, creep resistance and high-temperature mechanical properties of Mg–6Zn–3Cu alloy with La- and Ce-rich rare earth additions

Microstructure control of Mg alloy for structural component application

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