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镁合金拥有许多独特优点,被认为是最具有应用前景的材料之一。然而,力学性能相对较低限制了镁合金的应用。二十面体准晶相作为一种相对优良的镁合金增强相,对Mg-Zn-Y-(Zr)合金性能有很大的影响。通过改变准晶相的体积分数,Mg-Zn-Y-(Zr)合金在室温下的的屈服强度可达到150-450 MPa,因而生成准晶相被视为一种改善镁合金性能的有效方法。本文讨论了一系列含有准晶的Mg-Zn-Y-(Zr)合金,包括准晶相的形成机理、准晶相的结构和其与镁基体的位向关系,以及准晶相对镁合金性能的影响。
Magnesium alloy has many unique advantages, is considered as one of the most promising materials. However, the relatively low mechanical properties limit the use of magnesium alloys. The icosahedral quasicrystalline phase, as a relatively good magnesium alloy reinforcing phase, has a great influence on the properties of Mg-Zn-Y- (Zr) alloys. By changing the volume fraction of the quasicrystalline phase, the yield strength of the Mg-Zn-Y- (Zr) alloy reaches 150-450 MPa at room temperature, and thus the quasi-crystalline phase is considered as an effective method to improve the properties of the magnesium alloy . In this paper, a series of Mg-Zn-Y- (Zr) alloys containing quasicrystals are discussed, including the formation mechanism of quasicrystalline phase, the structure of the quasicrystal phase and its orientation relationship with the Mg matrix, as well as the quasi- Impact.