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Porosity,cracks,and mechanical properties of additively manufactured tooling alloys:a review

Advances in Manufacturing 2022年第2期10卷 175-204页

作者： Prveen Bidare Amaia Jimenez hany hassanin Khamis Essa School of Mechanical Engineering University of BirminghamBirminghamUK TECNUN Escuela de Ingenieria Universidad de NavarraManuel de Lardizabal 15San Sebastian20018Spain School of Engineering Technologyand DesignCanterbury Christ Church UniversityCanterbury CT11QUUK

Additive manufacturing(AM)technologies are currently employed for the manufacturing of completely functional parts and have gained the attention of hightechnology industries such as the aerospace,automotive,and biomedical *** is mainly due to their advantages in terms of low material waste and high productivity,particularly owing to the flexibility in the geometries that can be *** the tooling industry,specifically the manufacturing of dies and molds,AM technologies enable the generation of complex shapes,internal cooling channels,the repair of damaged dies and molds,and an improved performance of dies and molds employing ***,a reviewof AM processes and materials applied in the tooling industry for the generation of dies and molds is *** technologies used for tooling applications and the characteristics of the materials employed in this industry are first *** addition,the most relevant state-of-the-art approaches are analyzed with respect to the process parameters and microstructural and mechanical properties in the processing of high-performance tooling materials used in AM ***,studies on the AM of ferrous(maraging steels and H13 steel alloy)and non-ferrous(stellite alloys and WC alloys)tooling alloys are also analyzed.

关键词： Additive manufacturing(AM) Tooling alloys Super alloys Hybrid manufacturing Post processing

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Micro-fabrication of ceramics:Additive manufacturing and conventional technologies

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Journal of Advanced Ceramics 2021年第1期10卷 1-27页

作者： hany hassanin Khamis ESSA Amr ELSHAER Mohamed IMBABY Heba H.EL-MONGY Tamer A.EL-SAYED School of Engineering Canterbury Christ Church UniversityCanterburyCT11QUUK University of Birmingham EdgbastonB152TTUK Kingston University London Penrhyn RoadKingston Upon ThamesSurreyKT12EEUK Department of Mechanical Design Faculty of EngineeringMatariaHelwan UniversityP.O.Box.11718CairoEgypt Jubail University College Mechanical EngineeringKingdom of Saudi Arabia Center for Applied Dynamics Research(CADR) School of EngineeringUniversity of AberdeenAberdeenAB243UEUK

Ceramic materials are increasingly used in micro-electro-mechanical systems(MEMS)as they offer many advantages such as high-temperature resistance,high wear resistance,low density,and favourable mechanical and chemical properties at elevated ***,with the emerging of additive manufacturing,the use of ceramics for functional and structural MEMS raises new opportunities and *** paper provides an extensive review of the manufacturing processes used for ceramic-based MEMS,including additive and conventional manufacturing *** review covers the micro-fabrication techniques of ceramics with the focus on their operating principles,main features,and processed *** that need to be addressed in applying additive technologies in MEMS include ceramic printing on wafers,post-processing at the micro-level,resolution,and quality *** paper also sheds light on the new possibilities of ceramic additive micro-fabrication and their potential applications,which indicates a promising future.

关键词： micro-electro-mechanical system(MEMS) micro-fabrication ceramics micro parts additive manufacturing

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