The interface between long-period stacking-ordered (LPSO) structure and β' phase in Mg-Gd-Al alloys

Hao, Yiqiang; Chen, Xia; Zhao, Zhikai; Chen, Zhiqing; Chen, Bin

doi:10.1016/j.jallcom.2022.166267

Cited by 8 publications

(2 citation statements)

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“…The existence of precipitated phase in the Al-refined Mg-RE alloy during solid solution is an interesting phenomenon [ 13 , 14 , 15 , 16 , 17 ]; however, the precipitated phase was not characterized in detail in previous studies. Therefore, the lamellar precipitated phase was analyzed and studied in detail by TEM technology in this paper.…”

Section: Results and Analysismentioning

confidence: 99%

“…For the Zr-refined Mg-RE alloy, the second phase in the as-cast state is mainly the Mg-RE eutectic phase, and the Mg-RE phase completely dissolves into the matrix after solution treatment [ 12 ]. For the Al-refined Mg-RE alloy, due to the lower enthalpy of formation between Al and RE elements, various second phases can be formed, such as Al 2 RE, Al 11 RE 3 , LPSO, et al [ 13 , 14 , 15 , 16 ]. Ding et al [ 17 ] showed that the Al 2 RE phase in the Mg-RE-Al alloy is stable at high temperatures, which cannot be dissolved by homogenization and solution treatment.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Solution Treatment Time on Microstructure Evolution and Properties of Mg-3Y-4Nd-2Al Alloy

Zhao

Feng

et al. 2023

Materials

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In order to explore the microstructure evolution of an Mg-RE alloy refined by Al during solution treatment, an Mg-3Y-4Nd-2Al alloy was treated at 545 °C for different time periods. Phase evolution of the alloy was investigated. After solution treatment, the Mg-RE eutectic phase in the Mg-3Y-4Nd-2Al alloy dissolves, the granular Al2RE phase does not change, the acicular Al11RE3 phase breaks into the short rod-like Al2RE phase, and the lamellar Al2RE phase precipitates in the grains. With the extension of solution time, the precipitated phase of the lamellar Al2RE increased at first and then decreased, and its orientation relationship with the matrix is <112>Al2RE//<21¯1¯0>Mg and {111}Al2RE//{0002}Mg. The undissolved granular Al2RE phase can improve the thermal stability of the alloy grain by pinning the grain boundary, and the grain size did not change after solution treatment. Solution treatment significantly improved the plasticity of the alloy. After 48 h of solution treatment, the elongation increased to 17.5% from 8.5% in the as-cast state.

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