论文标题
基于缺陷的添加性生产钛合金的疲劳行为的表征
Defect-based characterization of the fatigue behavior of additively manufactured titanium aluminides
论文作者
论文摘要
添加性生产的钛合金TNM-B1在质地和热层压（髋关节）条件下以机械和机械的方式进行了微观结构和机械表征。在室温和800°C下进行拉伸和恒定振幅测试。使用分裂SEM图像，确定了裂缝诱导缺陷。使用臀部，可能会降低缺陷数量和大小，从而将疲劳强度提高43％至500 MPa。使用村上和湿沙瓦的模型方法，疲劳寿命与局部应力强度因子相关，可以描述为应力振幅的函数以及诱导断裂缺陷的大小和位置。
The additively manufactured titanium aluminide alloy TNM-B1 was characterized microstructurally and mechanically in the as-built and hot isostatically pressed (HIP) condition. Tensile and constant amplitude tests were performed at room temperature and 800 °C. Using fractographic SEM images, the fracture-inducing defect was identified. With the HIP, defect number and size could be reduced, increasing fatigue strength by 43% to 500 MPa. Using the model approaches of Murakami and Shiozawa, the fatigue life was correlated with the local stress intensity factor and could be described as function of the stress amplitude as well as the size and location of fracture-inducing defects.
