發(fā)布時間：2018-11-06 12:25

【摘要】：在CO2+SF6氣體保護條件下感應(yīng)熔煉制備了不同Y含量的AZ61-x Y(x=0,0.5,1,1.5,2)鎂合金,利用光學(xué)金相顯微鏡(OM)、掃描電鏡(SEM)、X射線衍射分析(XRD)、能譜分析(EDS)和拉伸及蠕變力學(xué)性能測試手段研究了Y添加對AZ61合金顯微組織和力學(xué)性能的影響。結(jié)果表明:合金中添加適量的稀土元素Y后,AZ61合金的顯微組織得到明顯的細化,合金中除了存在α-Mg和Mg17Al12相,還出現(xiàn)了塊狀析出相Al2Y。適量的Y顯著提高了合金在室溫和高溫時的強度和塑性,同時合金在150℃/70MPa條件下的抗蠕變性能也有顯著的提升。
[Abstract]:Different Y content of AZ61-x Y (X0. 0. 5 + 1. 5 + 1. 5) mg alloy was prepared by induction melting under the condition of CO2 SF6 gas protection. (XRD), was analyzed by optical metallographic microscope (OM),) scanning electron microscope (OM),) and X-ray diffraction (SEM), X). The effects of Y addition on the microstructure and mechanical properties of AZ61 alloy were studied by (EDS) and tensile and creep test. The results show that the microstructure of AZ61 alloy can be refined obviously by adding proper amount of rare earth element Y. Besides 偽-Mg and Mg17Al12 phases, there is a bulk precipitated phase Al2Y. in the alloy. The strength and plasticity of the alloy at room temperature and high temperature were significantly improved by appropriate Y, and the creep resistance of the alloy at 150 鈩，

本文編號：2314251