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Spark Erosion Machining of Aerospace Materials
Published in Neelesh Kumar Jain, Kapil Gupta, Spark Erosion Machining, 2020
Asma Perveen, Samad Nadimi Bavil Oliaei
Aerospace materials are meant to operate in extremely high pressure and temperature conditions, while maintaining a high specific weight to reduce the consumption of fuel as well as the operational cost. It is evident from the literature review presented in this chapter that profound investigations have been conducted in the past 2–3 decades to improve material processing, machining and manufacturing techniques of aerospace materials. Machinability of aerospace materials (even those considered difficult-to-machine) has been improved with the use of SEM and WSEM. However, SEM suffers from limitations such as tool electrode wear, long machining times, and the presence of heat affected zones. Therefore, identifying optimum parameters and evolving hybrid machining to overcome the limitations of a single machining process offer significant potential for improved machinability of aerospace materials. Continuous efforts towards discovering and developing newer aerospace alloys need continuous improvement of SEM to achieve the best possible (optimized) performance parameters. Future research in this direction should focus on the use of assistive SEM processes for newer aerospace alloys. Application of nano-SEM can be another interesting direction for future research. Since safety factors for the aeroplane industry cannot be traded-off in any case, with the advent of economical airlines, extensive research is needed on the feasibility of economical processing of aerospace materials to manufacture economical aeroplanes.
Novel Applications of Graphene in the Aerospace Industry
Published in Swamini Chopra, Kavita Pande, Vincent Shantha Kumar, Jitendra A. Sharma, Novel Applications of Carbon Based Nano-Materials, 2023
The ability of graphene to form stable and conducting thin films opens up many opportunities in EMI shielding. Recently, Haydale (Ammanford, U.K.) has commercialized graphene used for EMI shielding and has launched graphene-modified composite for lightning strike protection. The use of graphene in real-life industrial applications is set to bring about a paradigm shift in aerospace material solutions.
Abrasive belt grinding force and its influence on surface integrity
Published in Materials and Manufacturing Processes, 2023
Yun Huang, Gang Liu, Guijian Xiao, Jiayu Xu
Surface integrity can greatly affect the life and expressiveness of a part in the service, so it is important to understand how machining processes affect the surface integrity of a material. The surface integrity of metal parts mainly depends on the surface processing and forming method, and the quality of surface integrity has a significant impact on the overall performance and reliability of the parts.[6] Titanium alloy material is one of the key aerospace materials.[7] The use environment of the leaf disc is very harsh. The leaf disc is very likely to suffer fatigue failure under the action of multiple factors such as high speed, high load, and foreign body damage. The service performance of the leaf disc is closely related to the surface integrity formed during the machining process.[8,9]
Conductivity estimation of non-magnetic materials using eddy current method
Published in Nondestructive Testing and Evaluation, 2023
Pu Huang, Yiqing Ding, Jiyao Li, Lijun Xu, Yuedong Xie
Titanium alloys and stainless steels are widely used in industrial fields due to their high toughness, high specific strength, good high-temperature resistance, low density, and good fatigue resistance [1]. Especially, they have gradually replaced nickel-based alloys and copper alloys and other metal materials which are easily corrosive in the aerospace field. However, the mechanical properties such as the strength, hardness, rigidity, and plasticity of the surface metal materials may vary during the operation of the spacecraft [2]. The relevant mechanical properties of metal materials and their electrical conductivity are inseparable, so their mechanical properties can be evaluated by the measurement of conductivity. Moreover, in the production of aerospace parts and components, the combination of metal material conductivity detection with hardness and strength indicators can effectively ensure the reliability of the internal quality of the aerospace materials.
Creep life prediction for a nickel-based single crystal turbine blade
Published in Mechanics of Advanced Materials and Structures, 2022
Zhen Li, Zhixun Wen, Haiqing Pei, Xiaowei Yue, Pu Wang, Changsheng Ai, Zhufeng Yue
Import the gird into the Fluent solver. Then, open the energy equation and the SST turbulence model. Give fluid (compressible ideal gas) and solid (nickel-based single crystal superalloy blades and equiaxed crystal tongue and groove) material properties [36, 40]. The fluid molecular viscosity and thermal conductivity coefficient adopt Sutherland's equation [41], and the specific heat capacity is fitted with a temperature polynomial, as shown in equations (11)- (13). The material properties of nickel-based single crystal alloys and equiaxed crystals come from the Aerospace Materials Handbook [36].