Effect of microstructure on creep behaviour of cast Mg97Y2Zn1 (at.%) alloy

Garcés, G.; Oñorbe, E.; Dobeš, F.; Pérez, P.; Antoranz, J. M.; Adeva, P.

doi:10.1016/j.msea.2012.01.023

Cited by 57 publications

(25 citation statements)

References 25 publications

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“…The LPSO phase formed during solidification is generally based on the 18 R -type stacking and it transforms into that based on the 14 H -type stacking upon annealing 4,7,12–14 . On the other hand, type II includes Gd, Tb and Tm, and the LPSO phase of the 14 H -type is reported to form during annealing while it is absent immediately after solidification 5,8 . Accordingly, they have proposed a criterion for the formation of LPSO phases in the Mg-Zn-RE systems as follows 7 .…”

Section: Introductionmentioning

confidence: 99%

A formation criterion for Order-Disorder (OD) phases of the Long-Period Stacking Order (LPSO)-type in Mg-Al-RE (Rare Earth) Ternary Systems

Kishida

Yokobayashi

Inui

2017

Sci Rep

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The formation of OD (order-disorder) phases of the LPSO (long-period stacking ordered)-type in Mg-Al-RE (RE (rare earth) = Y, La, Ce, Nd, Sm, Dy, Ho, Er and Yb) ternary systems has been investigated for both as-solidified and annealed conditions. The OD phase is found to form in those systems with RE = Y, Nd, Sm, Dy, Ho and Er. The Mg-Al-RE OD phase formed is of the 18R-LPSO-type consisting of 6-layer structural blocks with the RE enrichment occurring in the four consecutive atomic layers in the structural block in the form of the Al6RE8 L12-type atomic clusters. The Mg-Al-RE OD phases are found to be stabilized by the inclusion of any atoms (either Mg, Al or RE) in the central site of the Al6RE8 L12-type atomic cluster. The occupancy ratio of the central site among Mg, Al and RE atoms varies with the RE element, so that the occupancy ratio of RE atoms increases with the increase in the atomic number of the RE element in particular for the late rare-earth elements. Based on the results obtained, a criterion based on the volume of the Al6RE8 atomic cluster is proposed to predict the formation of the Mg-Al-RE OD phases.

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Section: Introductionmentioning

confidence: 99%

A formation criterion for Order-Disorder (OD) phases of the Long-Period Stacking Order (LPSO)-type in Mg-Al-RE (Rare Earth) Ternary Systems

Kishida

Yokobayashi

Inui

2017

Sci Rep

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“…However, the inherently weak properties of Mg alloys, such as low strength, inferior ductility and poor thermal stability, seriously limit their wide applications in engineering. In the last decade, the strength and the ductility of Mg alloys have exhibited great improvement benefited from the discovery of LPSO structures phases, which indicates a bright prospect of Mg alloys in engineering [4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Study of Mg–Gd–Zn–Zr alloys with long period stacking ordered structures

Zhang

Bian

et al. 2013

Materials Science and Engineering: A

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“…The mechanical strength and creep resistance of Mg-Y,RE-Zn (RE = rare earths) alloys containing long-period stacking ordered (LPSO) phases at intermediate temperatures exceed by far those of commercial magnesium alloys [1,2,3,4,5,6]. LPSO-phases are solid solutions of yttrium or certain rare earth elements and transition metals in the magnesium lattice, where these atoms are arranged periodically in the magnesium basal planes to form ordered structures [7,8,9,10,11].…”

Section: Introductionmentioning

confidence: 99%

Maintaining High Strength in Mg-LPSO Alloys with Low Yttrium Content Using Severe Plastic Deformation

et al. 2018

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Alternative processing routes such as powder metallurgy, the extrusion of recycled chips, or equal channel angular pressing (ECAP) have been considered for effective methods of maintaining the high mechanical strength of Mg-Y-Zn alloys containing long-period stacking ordered structures with respect to the alloy processed by the conventional extrusion of as-cast ingots with the advantage of minimizing the yttrium content. A yield stress similar to that found for extruded Mg97Y2Zn1 alloy can be attained with only half of the usual yttrium and zinc additions thanks to the grain refinement induced by ECAP processing. The properties of Mg98.5Y1Zn0.5 subjected to ECAP are maintained up to 200 °C, but superplastic behavior is found above this temperature when the alloy is processed through a powder metallurgy route.

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Effect of microstructure on creep behaviour of cast Mg97Y2Zn1 (at.%) alloy

Cited by 57 publications

References 25 publications

A formation criterion for Order-Disorder (OD) phases of the Long-Period Stacking Order (LPSO)-type in Mg-Al-RE (Rare Earth) Ternary Systems

A formation criterion for Order-Disorder (OD) phases of the Long-Period Stacking Order (LPSO)-type in Mg-Al-RE (Rare Earth) Ternary Systems

Study of Mg–Gd–Zn–Zr alloys with long period stacking ordered structures

Maintaining High Strength in Mg-LPSO Alloys with Low Yttrium Content Using Severe Plastic Deformation

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