Abstract

The modern development of technology and industry depends to a large extent on improving the quality and performance of equipment. Additive technologies allow the production of optimized designs and equipment while maintaining all operational characteristics. The use of additive technologies in the production of parts for aerospace engineering requires a thorough study of the operational properties of materials at each stage of production, a comparative assessment of the test results with the parameters of products obtained by traditional technologies, as well as predicting the characteristics of the final product. In this work, a study of changes in the chemical and phase compositions, microstructure and microhardness of the VT6 titanium alloy samples was carried out at various stages of production: initial cast billet; a powder obtained by plasma centrifugal spraying of an ingot and a product obtained by selective laser melting (SLM). Analysis of the samples’ chemical composition was carried out on an X-ray fluorescence spectrometer with wave dispersion Rigaku Primus ZSX II, X-ray structural studies—on a Rigaku MiniFlex 600 diffractometer (CuK_α-radiation, λ = 1.54178 Å), equipped with a linear (1-D) D/teX semiconductor detector. The microstructure study of powder (granular) samples was carried out using the methods of optical and scanning electron microscopy, the measurement of microhardness—on a microhardness tester LECO M-400-H by the Vickers method. It was shown that microstructure of the samples after centrifugal sputtering was a combination of two solid solutions based on the hexagonal titanium modification (HCP) with slightly different crystal lattice parameters due to difference in concentrations of the alloying elements. Chemical composition of the alloy after SLM practically did not differ from the alloy in the initial state.

中文翻译：

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VT6合金结构从铸锭到合金材料的变化动力学

摘要

技术和工业的现代发展在很大程度上取决于改善设备的质量和性能。添加剂技术可在保持所有运行特性的同时生产出优化的设计和设备。在航空工程零件的生产中使用添加剂技术需要对材料在每个生产阶段的操作特性进行全面研究，对测试结果与传统技术获得的产品参数进行比较评估，并进行预测。最终产品的特征。在这项工作中，对VT6钛合金样品的化学和相组成，微观结构和显微硬度的变化在生产的各个阶段进行了研究。通过等离子离心喷涂铸锭获得的粉末和通过选择性激光熔化（SLM）获得的产品。样品的化学成分分析是在带有波色散Rigaku Primus ZSX II的X射线荧光光谱仪上进行的，X射线结构研究是在Rigaku MiniFlex 600衍射仪（铜ķ _α -辐射，λ= 1.54178埃），配有线性（1-d）d / TEX半导体检测器。粉末（颗粒状）样品的显微结构研究是使用光学和扫描电子显微镜方法，通过维氏法在显微硬度计LECO M-400-H上测量显微硬度。结果表明，离心溅射后样品的微观结构是两种基于六方钛改性（HCP）的固溶体的组合，由于合金元素浓度的不同，其晶格参数略有不同。SLM后合金的化学组​​成实际上与初始状态的合金没有什么不同。