Elevated temperature Mg-Al-Sr: Creep resistance, mechanical properties, and microstructure

Baril, Éric; Labelle, Pierre; Pekguleryuz, Mihriban

doi:10.1007/s11837-003-0207-7

Cited by 153 publications

(104 citation statements)

References 12 publications

(10 reference statements)

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“…1(I). The composition of the light gray phase is also not close to that of Al 3 Mg 13 Sr observed by Baril et al [11]. In Fig.…”

Section: Samples In the Mg+al 4 Sr+al 2 Sr Phase Fieldcontrasting

confidence: 43%

“…The (Al 4 Sr) phase is located at the grain boundary region and appears to be lamellae. The AJ51x, AJ62x and AJ62Lx alloys developed by Noranda also showed this phase [11]. Large ternary solid solubility was observed in this alloy.…”

Section: Samples In the Mg+al 4 Sr+g-phase Fieldmentioning

confidence: 57%

“…3(IV large precipitate observed in sample 2. However, the stoichiometry of this bulky phase was not clearly identified and they [11] tentatively designated the phase as Al 3 Mg 13 Sr. According to the current research, the extent of the (Mg 17 Sr 2 ) phase field in the calculated ternary Mg-Al-Sr system reported by [14] and [15] is predicted narrower than what it should be and thus the system needs to be re-optimized.…”

Section: Samples In the Mg+al 4 Sr+g-phase Fieldmentioning

confidence: 99%

“…[7][8][9][10] with some disagreements in identifying the invariant points. Baril et al [11] investigated four samples in the Mg-rich region of the Mg-Al-Sr system and tentatively designated a ternary phase as Al 3 6 Sr 60 reported by Makhmudov et al [8]. Jing et al [12] recently investigated the microstructure and tensile creep behavior of Mg-Al-Sr (AJ) based alloys and reported that a ternary interphase exists in the alloys containing 2-3 wt% Sr at the grain boundaries.…”

Section: Introductionmentioning

confidence: 99%

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Microstructural characterization of Mg–Al–Sr alloys

Aljarrah

Parvez

et al. 2007

Science and Technology of Advanced Materials

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The microstructural details of fourteen Mg-Al-Sr alloys were investigated in the as-cast form by a combination of scanning electron microscopy/energy dispersive spectrometer (SEM/EDS) analysis and quantitative electron probe microanalysis (EPMA). The heat transfer method coupled with the DSC measurement has been utilized to determine the solidification curves of the alloys. The morphology and the chemical composition of the phases were characterized. The microstructure of the alloys is primarily dominated by (Mg) and (Al 4 Sr). In the present investigation, ternary solid solubility of three binary compounds extended into the ternary system has been reported and denoted as: (Al 4 Sr), (Mg 17 Sr 2 ) and (Mg 38 Sr 9 ). The (Al 4 Sr) phase is a substitutional solid solution represented by Mg x Al 4Àx Sr and has a plate-like structure. The maximum solubility of Al in Mg 17 Sr 2 was found to be 21.3 at%. It was also observed that Mg 38 Sr 9 dissolved 12.5 at% Al. r

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“…1(I). The composition of the light gray phase is also not close to that of Al 3 Mg 13 Sr observed by Baril et al [11]. In Fig.…”

Section: Samples In the Mg+al 4 Sr+al 2 Sr Phase Fieldcontrasting

confidence: 43%

Section: Samples In the Mg+al 4 Sr+g-phase Fieldmentioning

confidence: 57%

Section: Samples In the Mg+al 4 Sr+g-phase Fieldmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microstructural characterization of Mg–Al–Sr alloys

Aljarrah

Parvez

et al. 2007

Science and Technology of Advanced Materials

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“…[14] B. Mg-Al-Sr Alloys Sr, like another alkali earth element Ca, is effective in improving the high temperature strength and creep resistance of Mg-Al-based alloys, and creep-resistant alloys based on the Mg-Al-Sr system have been developed, notably AJ52 (Mg-5Al-2Sr) and AJ62 (Mg-6Al-2Sr). [15,16] According to the work reported, AJ52 shows higher creep resistance than AJ62 while AJ62 gives a good combination of creep performance and castability. AJ62 has been used in hybrid engine blocks of BMW six-cylinder engines.…”

Section: A Mg-al-si Alloysmentioning

confidence: 99%

Evaluation of Magnesium Die-Casting Alloys for Elevated Temperature Applications: Microstructure, Tensile Properties, and Creep Resistance

Zhu

Easton

Abbott³

et al. 2015

Metall Mater Trans A

127

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Several families of magnesium die-casting alloys have been developed to operate at the elevated temperatures experienced in automotive powertrain applications. Most alloys are based on the Mg-Al system with alloying additions such as silicon, strontium, calcium, and rare earth elements (RE), although alloys with RE as the primary alloying constituent are also considered. This work presents an evaluation of the tensile properties and creep resistance of the most common magnesium die-casting alloys, in conjunction with the analysis of microstructure. The alloys investigated include AS31 (Mg-3Al-1Si), AJ52 (Mg-5Al-2Sr), MRI153A (Mg-9Al-1Ca-0.1Sr), MRI153M (Mg-8Al-1Ca-0.3Sr), MRI230D (Mg-6.5Al-2Ca-1Sn-0.3Sr), AXJ530 (Mg5Al-3Ca-0.2Sr), AE42 (Mg-4Al-2RE), AE44 (Mg-4Al-4RE), and AM-HP2+ (Mg-3.5RE-0.4Zn). It is shown that, among the various alloys evaluated, MRI230D, AXJ530, and AM-HP2+ have higher yield strength than the Al alloy A380, but the ductility is relatively low at room temperature for these alloys. In contrast, AS31 and the AE series alloys have very good room temperature ductility, but their yield strength is lower than that of A380. In terms of creep resistance, MRI230D, AXJ530, AE44, and AM-HP2+ are all comparable to the Al alloy counterpart at 423 K and 448 K (150°C and 175°C). Microstructural factors that are most important to the strength and creep resistance of the Mg die-casting alloys are discussed.

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