精品文档---下载后可任意编辑Zr 含量对 Ti-1100 合金 650℃拉伸变形和断裂机制的影响的开题报告摘要：本文旨在讨论 Zr 含量对 Ti-1100 合金在 650℃下的拉伸变形和断裂机制的影响。采纳扫描电镜（SEM）、透射电镜（TEM）和 X 射线衍射（XRD）等测试手段，分析了 Ti-1100 合金在不同 Zr 含量下的微观结构和晶格缺陷。同时，利用寿命测试和力学测试等方法，讨论了 Zr 含量对 Ti-1100 合金断裂韧性和塑性的影响。实验结果表明，随着 Zr 含量的增加，Ti-1100 合金的晶粒尺寸不断减小，同时晶格缺陷也逐渐减少。在 650℃的高温条件下，Zr 含量对Ti-1100 合金的塑性有着显著的影响。随着 Zr 含量的增加，Ti-1100 合金的屈服强度和抗拉强度都有所提高，但塑性逐渐降低。此外，Zr 含量还影响了 Ti-1100 合金的断裂韧性。随着 Zr 含量的增加，Ti-1100 合金的断裂韧性逐渐降低。关键词：Zr 含量；Ti-1100 合金；650℃；拉伸变形；断裂机制。Abstract:This study aims to investigate the effect of Zr content on the tensile deformation and fracture mechanism of Ti-1100 alloy at 650℃. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD) were used to analyze the microstructure and lattice defects of Ti-1100 alloy with different Zr contents. At the same time, lifetime testing and mechanical testing were used to study the effect of Zr content on the fracture toughness and plasticity of Ti-1100 alloy.The experimental results show that as the Zr content increases, the grain size of Ti-1100 alloy continues to decrease, and the lattice defects also gradually reduce. At high temperature of 650℃, Zr content has a significant effect on the plasticity of Ti-1100 alloy. As the Zr content increases, both the yield strength and tensile strength of Ti-1100 alloy increase, but the plasticity gradually decreases. In addition, the Zr content also affects the fracture toughness of Ti-1100 alloy. With the increase of Zr content, the fracture toughness of Ti-1100 alloy gradually decreases.精品文档---下载后可任意编辑Keywords: Zr content; Ti-1100 alloy; 650℃; tensile deformation; fracture mechanism.
