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), W-phase (Mg3Y2Zn3) and X-phase (Mg12YZn), are obtained by adjusting the Zn to Y mass ratio. Mn element exists as the fine Mn particles, which are well distributed in the alloy. Thermal analysis...), W-phase (Mg3Y2Zn3, cubic structure) is also detected by XRD as well as I-phase and α-Mg. Fig. 1 Optical images of as-cast Mg-Zn-Mn-Y alloys Fig. 2 XRD patterns of as-cast Mg-Zn-Mn-Y alloys Table 2......
and biodegradation of as-cast Mg-2Zn-xGd-0.5Zr alloys was investigated. The results showed that there were mainly α-Mg, I-phase, W-phase and MgZn2 phase in Mg-Zn-Gd-Zr alloys. With increase of the Gd content, the strength of the alloys was enhanced due to the second phase strengthening and grain refinement. The degradation resistance of Mg-2Zn-0.5Zr alloy was increased by adding 0.5%–1% Gd due......
and W-phase(Mg3 Zn3 Y2) particles and dissolved MgZn2 phase in the FSP ZK60 alloy. With the addition of rare earth element yttrium(Y) into the ZK60 alloy, the ratio of the high angle grain boundaries... second phase particles with high thermal stability in the FSP ZK60-Y alloy. Grain boundary sliding was identified as the primary deformation mechanism in the FSP ZK60 and ZK60-Y alloys from......
equiaxed grains and elongated grains with I-phase(Mg3YZn6);alloy ZM31 + 3.2Y contained I-phase and W-phase(Mg3Y2Zn3);alloy ZM31 + 6Y had long-period stacking-ordered(LPSO) X-phase(Mg12YZn) and Mg24Y5...,the retention of the hightemperature deformation resistance increased with increasing Y content mainly due to the presence of thermally-stable LPSO X-phase.关键词:......
: Ti5553-xFe (x=0.4, 1.2, 2.0, wt.%) alloys have been designed and fabricated through BE (blended element) sintering to investigate the effect of Fe-addition on athermal ω-phase transformation, α-phase evolution and age hardening behavior. The results show that the formation of athermal ω-phase is fully suppressed in water-quenched specimens when Fe-addition is up to 2 wt.%. The relevant timescales......
solution are eroded badly, while W-phase is eroded partially. At the same time, the I-phases exhibit excellent corrosion resistance property. The resistance to corrosion of Mg68Zn28Y4 alloy is improved... be figured as a(Mg) solid solution. The bright white icosahedral quasicrystals appearing in small pentagon, hexagon and petal-shape are enwrapped in W-phase (Mg3Zn3Y2), which are shown in Fig.1(b......
of which were investigated, separately. The results reveal that the microstructures of the as-cast Mg94Zn3YxGd3-x alloys, with n(Zn)/n(Y+Gd)=1:1, consist of a(Mg) phase, Mg3Zn3RE2 (W) phase, Mg12ZnRE... increase remarkably with the increase of the volume fraction of LPSO phase. In addition, the pinning effect of W-phase and dispersive cube-shaped Mg-Y-Gd phase is beneficial to improving the mechanical......
always lead to a precipitation of some ternary phases, such as the W-phase and the I-phase [5-8]. Furthermore, both the I-phase and the W-phase usually form on the basis of the chemical compositions...]. As reported by PARK et al [15], the yield tensile strength of Mg-Zn-Y-Zr alloys is ranging from 150 MPa to 450 MPa at room temperature, depending on the content of the I-phase. However, the W-phase......
ratio of Y to Zn, and X (Mg12YZn)-phase, W (Mg3Y2Zn3)-phase and I (Mg3YZn6)-phase come out in sequence as the ratio of Y to Zn decreases. The mole ratios of Y to Zn with the corresponding phase constituent are suggested quantitatively as follows: the phase constituent is α-Mg + I when the mole ratio of Y to Zn is about 0.164; α-Mg + I +W when the mole ratio of Y to Zn is in the range of 0.164-0.33;α......
the analyzed and measured results of back-EMF. The higher flux linkage is made in the W-phase than other phases because of the difference in magnetic resistance due to the end effect. In the result, the back-EMF of the W-phase located between the U and V phases is higher than that of other phases. The back-EMF constant is displayed in Table 2. As shown in Table 2, the maximum root-mean-square (RMS) value......