Aeronautical materials' and products' demand for data, data resources sharing and data presenting style is analyzed from the perspectives of designing, planning, testing, applying and repairing department of industry and military, and discussed in the following aspects. 1) Systematic accumulation of environmental data, environmental effect data related to hotspot issues such as severe natural environment and induced environment, aeronautical microclimatic environment, operational environment, co-effect of environment and working condition, where environmental damaging rule, properties degradation rule, failure mechanism of the materials, coatings, component and products should be studied. 2) Establishment of a framework for environmental testing digital management and supporting scheme for data sharing & information exchange, so that an information platform is provided for environment testing application. 3) Reinforcement of analysis and secondary exploration of environmental testing data and acquirement of hidden knowledge. Finally, achievements from environmental testing should be engaged to the whole process of aeronautical products designing, manufacturing, application and maintenance, so that the technical mode route of "prediction-protection" can be realized.

This paper describes the application progress of American fifth-generation fighter's cockpit transparency technology. The US first three generations fighters' cockpit transparency front windshield uses the reinforced inorganic glass/film/inorganic glass reinforced material structure, the front side is curved plexiglass windshield, and the rear part of the plexiglass has bubble canopy, and it only provides bulletproof function of the pilot-field observation without any feature film. The US fourth-generation fighter cockpit transparency plexiglass uses pieces/film/polycarbonate material laminate structure, with early version using wear resistant functional coating and the latter version using stealth features film. The US fifth-generation fighter cockpit transparency uses polycarbonate structure and plexiglass pieces/polycarbonate material laminate structure, and uses stealth features film. Stealth technology is developing in the direction of all-weather, omni-direction, ultra-wide stealth frequency band, and intelligence. Future fighters will have ultra-wideband electromagnetic, infrared, acoustic, laser, video and other omni-directional super stealth performance. It is of great significance to learn from the failure and successful experience of the United States in the field of fightercockpit transparent parts. To study the cockpit transparent parts technology suitable for Chinese fighters will help to improve the overall technical level of Chinese fighters.

Residual stress, always existing in additive manufactured AlSi10Mg alloy, has negative effects on its application. Therefore, it is needed to be controlled or even eliminated by heat treatment. The microstructure, properties and residual stress of as built and annealed alloys are investigated using X ray diffraction, optical microscope, field emission scanning electron microscope, transmission electron microscope, electron backscattered diffraction, microhardness and Raman spectrum tests. The results show that as built alloy consists of supersaturated Al solid solution and Si phase. Additionally, the Si phase exists in the forms of cellular eutectic silicon and dispersed silicon nanoparticles. Meanwhile, the grain size of as built alloy is relatively fine, and the d₅₀ value of grain size distribution is about 10.4 μm. Annealing treatments lead to the depositions of alloying elements from supersaturated Al solid solution, and formations of equilibrium phase Mg₂Si and Si phase as the annealing temperature ranging from 250℃ to 300℃. With the increase of annealing temperature, the alloying elements precipitate out more thoroughly. Furthermore, the coarsening of cellular eutectic silicon and silicon nanoparticles, grain growth and recrystallization also occur owing to annealing treatment. Because of the decline of fine grain strengthening, solid solution strengthening and dispersion strengthening after annealing treatment, the microhardness decreases. The residual stress, however, can be significantly reduced by annealing process with a reduction of 60%~80%. Consequently, it is necessary to develop new heat treatment system according to the characteristic of additive manufactured aluminum alloy, in order to regulate and control the microstructure and properties.

To improve the fatigue performance of aircraft rotor of TB6 titanium alloy, the effects of laser shock peening (LSP), shot peening (SP) and their combination processing methods on surface integrity and axial fatigue property of the titanium alloy are investigated. The surface topography, residual stress distribution and microstructure are characterized by white light interferometer, X-ray diffraction stress tester and scanning electron microscope. The axial fatigue life and limit are investigated by fatigue tester. Results show that compared with the grinding (GD) specimen under the same test conditions, the fatigue life of LSP specimens is improved by 32.2 times, while the fatigue lifes of SP and the combination processing specimens are both increased by at least 126.4 times. The combination processing method exhibits better improvement for fatigue limit than the SP method.

Dehydrogenated curing fluorosilicone sealant is prepared at room temperature by mixing fluorosilicone liquid rubber, fumed silica, and metal oxide. Then heat resistance performance is investigated by thermal aging experiment at different temperatures (250 ℃ and 300 ℃). It is revealed that the heat resistance performance of rare earth metal oxide based fluorosilicone sealant is better than that of iron oxide at 250 ℃. However, when the temperature goes up to 300℃, the iron oxide based fluorosilicone sealant's heat resistance performance is better than the rare earth metal oxide's. Concerning the universality and economy of sealant, the iron oxide based fluorosilicone sealant possesses a wider application area.

Optical titanium dioxide film is deposited with the ion beam assistant twin magnetron MF reactive sputtering equipment. The variation of reactive plasma is monitored by Langmuir probe and the I-V curve is also tested simultaneously. The results demonstrate that the assistant ion beam plays an important role in enhancement of electrical charge density in the plasma region. With the increase of ion beam power assistance, the electron density increases and both minus floating potential and reactive sputtering voltage decrease. The plus potential on the surface of the substrate increases during the variation from electron-rich to ion-rich state. The substrate steps into the plasma electric neutrality state when the ion beam assistance power supply is 109 W.