论文部分内容阅读
研究了Sn元素对镁合金显微组织、物相和力学性能的影响。结果表明,当Sn含量达到4%时,使得合金组织晶粒细化,合金的综合力学性能得到了改善,其抗拉强度和伸长率分别达到了112.9 MPa和10%。在铸态合金中发现了鱼骨状的共晶组织(α-Mg+Mg2Sn)、杆状的离异共晶组织Mg2Sn和球形颗粒状的第二相Mg2Sn。此外,随着Sn含量的增加,合金室温下的断裂模式由解理断裂向准解理断裂,再向沿晶断裂转变。
The effect of Sn element on the microstructure, phase and mechanical properties of magnesium alloy was studied. The results show that when the Sn content reaches 4%, the grain size of the alloy is refined and the mechanical properties of the alloy are improved. The tensile strength and elongation reach 112.9 MPa and 10% respectively. The fish bone eutectic (α-Mg + Mg2Sn), rod-shaped dissimilar eutectic Mg2Sn and spherical second phase Mg2Sn were found in as-cast alloys. In addition, as the Sn content increases, the room temperature rupture mode from cleavage fracture to quasi-cleavage fracture, and then to intergranular fracture transformation.