Gyroscope is the core of an inertia system and made by machining process. Machining process imports large residual stress. The residual stress will be released and induces large deformation of gyroscope frame. In this paper, the effects of residual stress on deformation of gyroscope frame were simulated by finite element method. Different stress distribution leads different deformation. Compressive stress can make sample long and tensile stress make sample short. The stress released in deformation process which reduced about 90%.
316L stainless steel is widely used in the fields of thermonuclear industry and petrochemical industry due to its excellent comprehensive mechanical properties and corrosion resistance. Especially in the petroleum industry, 316L stainless steel is commonly used as oil pipelines and storage tanks because of its high corrosion resistance to media such as CO2. However, 316L stainless steel will pitting in a high Cl− concentration environment, posing a potential risk to these devices. At present, there is not enough data to show that whether 316L stainless steel will bring about pitting or stress corrosion cracking under the synergistic effect of high stress and high Cl− concentration, this brings higher risks to the application and promotion of this material. In response to this phenomenon, the paper uses constant stress corrosion cracking method, and analyzes the fracture by scanning electron microscope (SEM). Researching 316L Stainless Steel corrosion behaviors and corrosion creeps in different Cl− concentration solutions.
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