Effects of Al and Zn additions on mechanical properties and precipitation behaviors of Mg–Sn alloy system

Son, Hyeon Taek; Lee, Jong Beom; Jeong, Hye Gwang; Konno, Toyohiko J.

doi:10.1016/j.matlet.2011.03.083

Cited by 44 publications

(9 citation statements)

References 6 publications

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“…Fig. 11 summarizes the yield strengths and elongation to failure of various Mg based wrought alloys fabricated by conventional ingot metallurgy process [2,5,6,[9][10][11]15,16,18,[40][41][42][43][44][45][46][47][48][49][50]. The TZAM6620 alloy developed in this work showed better strength-ductility balance compared to previously studied Mg-Sn based alloys and the other commercially available wrought alloys such as Mg-Al-Zn and Mg-Zn alloys.…”

Section: Discussionmentioning

confidence: 99%

Strong and ductile heat-treatable Mg–Sn–Zn–Al wrought alloys

et al. 2015

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a b s t r a c tA newly developed Mg-Sn-Zn-Al based alloy shows substantial strengthening by artificial aging. A Na-doped Mg-5.4Sn-4.2Zn-2.0Al-0.2Mn-0.1Na (TZAM5420À0.1Na) (wt.%) alloy exhibited a significant increase in yield strength from 243 to 347 MPa by a T6 treatment due to the uniform dispersion of nanoscale precipitates by aging. The trace addition of Na causes the formation of Sn-Na co-clusters in the early stage of aging, which provides heterogeneous nucleation sites for Mg 2 Sn precipitates. However, Na strongly segregates at grain boundaries and this degrades the ductility significantly. To overcome this problem, we developed a Na-free Mg-6.6Sn-5.9Zn-2.0Al-0.2Mn (TZAM6620) alloy, in which nano-scale MgZn 2 precipitates are uniformly dispersed by double aging. Pre-aging caused the formation of Zn-rich Guinier Preston zones, which acted as heterogeneous nucleation sites for the MgZn 2 precipitates. The double-aged TZAM6620 alloy exhibited a very high yield strength of 370 MPa with large elongation of 14%.

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Section: Discussionmentioning

confidence: 99%

Strong and ductile heat-treatable Mg–Sn–Zn–Al wrought alloys

et al. 2015

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“…The Al additions enhanced the age hardening response of the alloy markedly, which is ascribed to that Al element can change the interfacial energy between a-Mg matrix and Sn, and Al may reduce the solid solubility of Sn, thus improving the driving force for the precipitation and increasing the number of fine Mg 2 Sn precipitates. 13,16,28 The hardening response of the Mg-3Sn-1Al-2Zn alloy aging at 180uC is also shown in Fig. 3; the hardness increases with aging time and the peak hardness is up to 75 HV after about 60 h, which is relatively affected by the much Al and Zn atoms dissolved in a-Mg matrix.…”

Section: Age Hardening Responsementioning

confidence: 95%

Microstructure and mechanical properties of as aged Mg–3Sn–1Al and Mg–3Sn–2Zn–1Al alloy

Chen

Jin

et al. 2015

Materials Science and Technology

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Effect of Zn on the microstructure, age hardening response and mechanical properties of Mg3Sn-1Al alloy which is immediately aged at 180uC after extrusion process (T5) was investigated. It was found that the Zn can refine the microstructure, remarkably improve the aging response with the peak hardness increases to 75 HV and the time to peak hardness reduces from y110 to y60 h, which is attributed to the solid solution hardening of Al, Zn and an amount of finer Mg 2 Sn precipitates. The as aged Mg-3Sn-2Zn-1Al alloy exhibits better mechanical property at room temperature or 150uC than that of Mg-3Sn-1Al alloy, which is ascribed to the fine grained microstructure and thermally stable Mg 2 Sn particles dispersed at grain boundaries and in the matrix.

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“…Obviously, with extending ageing time, coarsening and increase of the Mg 2 Sn phase content were found. The precipitation process of the Mg 2 Sn phase in the Mg-Sn-(X) alloys has been widely reported [17][18][19][20][21][22][23][24][25][26]. According to previous studies, it was found that lath-shaped, plate-like and polygon Mg 2 Sn precipitates may be formed after ageing in these alloys.…”

Section: Microstructure Of Mg-si-sn Alloysmentioning

confidence: 95%

The microstructure and creep properties of as-cast Mg-Sn-Si-(Al) magnesium alloys

Rzychoń

2020

Archiv.Civ.Mech.Eng

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Magnesium alloys containing rare earth metals exhibit good creep resistance up to 300 °C and good tensile properties at ambient temperature. The high cost of rare earth has led to studies regarding the creep resistance of Mg alloys with cheap alloying elements (Sn, Ca, Si) that could be substituted for Mg-RE alloys. In this paper, the influence of Si and Al on microstructure and mechanical properties of Mg-7Sn alloy was investigated using optical (LM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction analysis (XRD), tensile tests and creep tests at 200–250 °C. Microstructure of as-cast alloys consists of α-Mg matrix and intermetallic compounds at the interdendritic regions. Heat treatment consisting of solid solution treatment and ageing increases the tensile properties at ambient temperature due to the precipitation of the fine Mg2Sn phase. The creep resistance of aged Mg-7Sn alloy is poor. The addition of Si and Al to Mg-7Sn alloy has resulted in improving the creep resistance due to the refinement of Mg2Sn phase and the appearance of Mg2Si phase at the grain boundaries. The Mg-7Sn-1Si alloy exhibits better creep resistance at 200 °C than Mg-7Sn-5Si and Mg-7Sn-5Si-2Al alloys. The Mg-7Sn alloys with 5% Si have better creep properties at 250 °C in comparison to Mg-7Sn-1Si alloy.

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Effects of Al and Zn additions on mechanical properties and precipitation behaviors of Mg–Sn alloy system

Cited by 44 publications

References 6 publications

Strong and ductile heat-treatable Mg–Sn–Zn–Al wrought alloys

Strong and ductile heat-treatable Mg–Sn–Zn–Al wrought alloys

Microstructure and mechanical properties of as aged Mg–3Sn–1Al and Mg–3Sn–2Zn–1Al alloy

The microstructure and creep properties of as-cast Mg-Sn-Si-(Al) magnesium alloys

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