Characterisation of precipitates in an aged Mg–Zn–Ti alloy

Buha, Joka

doi:10.1016/j.jallcom.2008.05.019

Cited by 37 publications

(14 citation statements)

References 17 publications

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“…The results showed that the addition of 0. [9,10] . Furthermore, our previous work showed that, among the studied ternary alloys, the Mg-8Sn-1Zn alloy exhibits excellent mechanical properties [11] .…”

Section: Key Laboratory Of Interface Science and Engineering In Advanmentioning

confidence: 99%

Improved tensile properties of Mg-8Sn-1Zn alloy induced by minor Ti addition

et al. 2016

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Owing to their good mechanical properties at room temperature, conventional Mg-Al and Mg-Zn based alloys have attracted great interest. Unfortunately, they have problems associated with lower creep and corrosion resistance, and cannot meet the requirements of key structural components due to the low thermal stability of the main secondary phase at elevated temperatures (>150 °C) [1][2] . Therefore, it is imperative to develop novel Mg alloys with excellent performance at high temperatures.Mg-Sn based alloys have received considerable attention as potential candidates for high performance casting and wrought magnesium alloys with enhanced thermal stability owing to the presence of high melting temperature (T m ≈ 770 °C) Mg 2 Sn particles in the microstructure [3][4] . However, the coarse Mg 2 Sn phase and the dendritic structure are often present in ascast binary Mg-Sn alloys, hindering their industrial application [5] . Consequently, the modification of the Abstract:In this study, the influence of minor titanium (Ti) addition on the microstructure and tensile properties of Mg-8Sn-1Zn based alloys were investigated by means of optical microscopy, X-ray diffraction, scanning electron microscopy, energy dispersive spectrometry, and tensile tests. The results showed that Ti can decrease the secondary dendrite arm spacing (SDAS). The tensile strength of the Mg-8Sn-1Zn-Ti alloys is initially increased by increasing the Ti content up to 0.09wt.%, but subsequently decreased for further increase of Ti content. The improved tensile properties are attributed to the decreased SDAS and refined Mg 2 Sn phases, as well as the increased fraction of tin (Sn) segregated regions. The tensile fracture surface of the studied alloys shows mixed characteristics of cleavage and quasi-cleavage fracture. Adding Ti does not significantly change the fracture mode of the studied alloys.Key words: Mg-8Sn-1Zn alloy; tensile properties; titanium; tin segregation Micro-alloying can ideally help achieve this goal. The element Ti has been widely used owing to its effectiveness in grain refinement of not only Al-based and Mg-Al alloys, but also of Al-free Mg alloys [6] . Choi et al. [7] reported that a proper control of trace amounts of Ti below the solubility limit has the potential to improve the corrosion resistance of cast Mg-Al alloys by decreasing the grain size and the volume fraction, as well as the size of lamellar (α+β) structures and the divorced eutectic β-phase, with the morphology being transformed from a continuous network structure to a semi-continuous one. Similarly, a study by Candan et al. [8] on AZ91 alloys containing 0.2-0.5wt.% Ti indicated that an improvement in tensile strength can be achieved by introducing Ti to modify the microstructure and refine the grain size. However, until now, only Yang et al. [9] have investigated the effects of minor Ti additions on the ascast microstructure and mechanical properties of Mg-Sn based alloys. The results showed that the addition of 0.1-0.3 wt.% Ti to the Mg-3Sn-2Sr alloy can simulta...

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Section: Key Laboratory Of Interface Science and Engineering In Advanmentioning

confidence: 99%

Improved tensile properties of Mg-8Sn-1Zn alloy induced by minor Ti addition

et al. 2016

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“…5b, indicated by arrow) can be observed. In some studies [16][17][18][19][20][21], rod-shaped precipitates are often considered to be 1 β‵ -MgZn 2 phase. As the aging time increases again when the hardness reaches the second peak (96 h) (as shown in Fig.…”

Section: Microstructurementioning

confidence: 99%

Aging microstructure and mechanical properties of ZA84+Ca–Bi magnesium alloy

Dong¹,

Lin²,

Ye³

et al. 2015

Materials Science and Engineering: A

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“…One of the most recent and important applications of magnesium alloys is in medical industry as biodegradable materials since they can be absorbed in human body [3]. Although certain titanium alloys or stainless steel are widely used as the permenant and non-permanent bone implants, but nowadays the magnesium based alloys are the more appropriate candidates for the non-permanent application, because; (i) they are biodegradable, hence, no need for secondary surgery for their removal, (ii) their elastic moduli (45 GPa) are closer to that of the natural bone (15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25), (iii) magnesium is an essential element for the human body, and (iv) they have a low density being close to that of human bone [4,5]. However, the high corrosion rate, low mechanical properties, and low cold formability are the magnesium main setbacks [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…Mechanical properties of magnesium alloys can also be improved by age hardening process [18]. It has been reported that zinc and calcium improve the age hardening response of the magnesium alloys [19].…”

Section: Introductionmentioning

confidence: 99%

Influence of heat treatment and aging on microstructure and mechanical properties of Mg‐1.8Zn‐0.7Si‐0.4Ca alloy

Shaeri

Taheri

2019

Materialwissenschaft Werkst

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In order to optimize the aging treatment of Mg‐1.8Zn‐0.7Si‐0.4Ca alloy, different times and temperatures of solid solution and age hardening were applied to the alloy specimens. Microstructures and mechanical properties of the specimens were investigated using the optical microscopy, field emission scanning electron microscopy equipped with an energy dispersive x‐ray spectrometer, x‐ray diffraction, hardness, and shear punch tests. The lowest hardness and strength were achieved by solution treating of the alloy at 500 °C for 8 h, presenting the optimal condition for solution treatment of the alloy. The microstructural examinations revealed three different precipitates consisting of CaMgSi, Ca2Mg6Zn3, and Mg2Si in the solid solution specimens. It was found that the highest peak hardness and strength are obtained by aging the alloy at 150 °C for 16 h. This condition was confirmed by differential scanning calorimetry (DSC) tests performed on the solid solution and aged specimens.

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Characterisation of precipitates in an aged Mg–Zn–Ti alloy

Cited by 37 publications

References 17 publications

Improved tensile properties of Mg-8Sn-1Zn alloy induced by minor Ti addition

Improved tensile properties of Mg-8Sn-1Zn alloy induced by minor Ti addition

Aging microstructure and mechanical properties of ZA84+Ca–Bi magnesium alloy

Influence of heat treatment and aging on microstructure and mechanical properties of Mg‐1.8Zn‐0.7Si‐0.4Ca alloy

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