挤压态ZM61-Sn合金的显微组织及高温力学性能（英文）
发布时间：2018-10-24 14:46
【摘要】：利用金相显微镜(OM)、X射线衍射(XRD)、扫描电镜(SEM)和高温拉伸对挤压态ZM61-x Sn(x=2,4,8,质量分数,%)合金的显微组织、高温力学性能和断裂机制进行了研究。结果表明添加Sn元素可有效细化合金组织且细化效果随Sn含量的增加而增强。挤压态ZM61-x Sn(x=2,4,8)合金的平均晶粒尺寸分别为11,8和4μm。随Sn含量的增加,合金的力学性能先升高后降低。在所有的实验合金中ZM61-4Sn合金的强度最高,当在180℃下进行拉伸实验时,其极限抗拉强度和屈服强度分别为216和173 MPa。合金的延伸率随Sn含量的增加而增加,当拉伸温度为300℃时,ZM61-x Sn(x=2,4,8)合金的延伸率分别为183.8%,235.8%和258.6%。ZM61-4Sn合金具有最好的强度和塑性的结合。试样最后的断裂主要由局部缩颈引起以及试样的主要断裂机制为显微孔洞聚集。当在260和300℃下拉伸时,合金发生了不完全的动态再结晶。
[Abstract]:The microstructure, high temperature mechanical properties and fracture mechanism of extruded ZM61-x Sn (xan2o4%, mass fraction,%) alloy were studied by (OM), X ray diffraction (XRD), scanning electron microscope (SEM) and high temperature tension. The results show that the addition of Sn elements can effectively refine the microstructure of the alloy and the refining effect increases with the increase of Sn content. The average grain size of the extruded ZM61-x Sn (XG _ 2O _ 4N _ 8) alloy is 11 渭 m and 4 渭 m, respectively. With the increase of Sn content, the mechanical properties of the alloy first increased and then decreased. The ultimate tensile strength and yield strength of ZM61-4Sn alloy were 216 and 173 MPa., respectively, when tensile tests were carried out at 180 鈩，
本文编号：2291713
[Abstract]:The microstructure, high temperature mechanical properties and fracture mechanism of extruded ZM61-x Sn (xan2o4%, mass fraction,%) alloy were studied by (OM), X ray diffraction (XRD), scanning electron microscope (SEM) and high temperature tension. The results show that the addition of Sn elements can effectively refine the microstructure of the alloy and the refining effect increases with the increase of Sn content. The average grain size of the extruded ZM61-x Sn (XG _ 2O _ 4N _ 8) alloy is 11 渭 m and 4 渭 m, respectively. With the increase of Sn content, the mechanical properties of the alloy first increased and then decreased. The ultimate tensile strength and yield strength of ZM61-4Sn alloy were 216 and 173 MPa., respectively, when tensile tests were carried out at 180 鈩，
本文编号：2291713
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