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Spheroidizing Behavior and Spheroidizing Kinetics of W-phase During Solid-Solution Treatment in Mg–Zn–Y–Mn–(B) AlloysKai Yang1,2,Jin-Shan Zhang1,2,Xi-Mei Zong1,2,Wei Liu1,2,Chun-Xiang Xu1,21. College... mechanism of W-phase in the Mg–Zn–Y–Mn–(B) alloys during solid-solution treatment was investigated by using kinetic methodologies. The microstructure and mechanical properties of heat-treated......
investigated. The results show that the increase of Zn content results in the volume fraction of W-phase (Mg3Zn3Gd2) increasing while that of Mg3Gd phase decreasing. The strength of Mg-8Li-xZn-1Gd alloys is improved with the increase of Zn content, which is ascribed to the second phase strengthening of fine strip-like W-phase and the solid solution strengthening of Zn element. For Mg-8Li-4Zn-yGd......
High strength magnesium alloy with α-Mg and W-phase processed by hot extrusion YANG Wen-peng1, GUO Xue-feng2 1. School of Materials Science and Engineering, Xi’an University of Technology, Xi.... The results show that the alloy is composed of α-Mg and W-phase. The microstructure of the as-extruded alloy has a bimodal grain size distribution. The fine grains with the mean size of 1.2 mm are formed......
, distribute in the α-Mg matrix. The coexistence of the face-centered icosahedral quasicrystalline phase (I-phase) and W-phase with the face-centered cubic structure is found in the as-cast alloy. The coexistence of I-phase and W-phase in the Mg-Zn-Er alloy is because the W-phase is the primary phase and the I-phase forms by peritectic reaction during solidification.关键词:......
Trans. Nonferrous Met. Soc. China 25(2015) 713-720 Influence of I-phase and W-phase on microstructure and mechanical properties of Mg-8Li-3Zn alloy Guo-bing WEI1, Xiao-dong PENG1,2, Bao ZHANG1, Amir... 2014 Abstract: Microstructures and mechanical properties of LZ83-xY alloys containing I-phase and W-phase were investigated by XRD, OM, SEM and EDS. The experimental results show that the content of I......
, especially for the Mg3Zn3Er2 phase (W-phase). It is indicated that the existence of the W-phase activates the stress concentrations due to the incapacity of W-phase for the load transfer, which results in the void at the inner of the W-phase. In comparison, the interface between the matrix and the secondary phase is stable. In conclusion, the characters of the secondary phases with respect to size......
of the as-cast Mg–Zn–Y–Nd alloy has been investigated. The results showed that as Zn content increased, the volume fraction of secondary phases increased. Moreover, the phase transformation from W-phase to W-phase and I-phase occurred. In the as-cast state,W-phase exists as eutectic and large block form. When Zn content increases to 6 and 8%(wt%), small I-phase could precipitate around W-phase particles......
-crystal phase were studied.The microstructure of the as-cast alloy consists of a-Mg solid solution grains, intermetallic particles and eutectic phases(W-phase and I-phase), and huge grains with serious... phases transform into spherical shape as the I-phase turns to W-phase. After heat treatment for long time, the alloy is over burnt and the W-phase decomposes to Mg–Y binary phase.关键词:......
fraction) are composed of the W-phase and the α-Mg matrix. Meanwhile, the addition of 4%-10% Zn results in the formation of the I-phase, the W-phase and the α-Mg matrix. When the addition of Zn reaches 12%, the W-phase disappears and the phase constituents of the alloys mainly include the I-phase and the Mg4Zn7 phase besides the α-Mg solid solution. The alloy containing 6% Zn has better mechanical......
phase.The primary solidification phase had an icosahedral structure.The dendritic phase was the W-phase,and eutectic structure phase was the Mg 7 Zn 3 phase.Microstructures of icosahedral phase(I-phase),W-phase and Mg 7 Zn 3 phase in Mg 44 Zn 44 Gd 12 alloy were investigated.The results indicated that the I-phase in Mg 44 Zn 44 Gd 12 alloy was a face-centered icosahedral quasicrystal......