Advancements in Electrospark Deposition (ESD) Technique: A Short Review

被引:38
作者
Barile, Claudia [1 ]
Casavola, Caterina [1 ]
Pappalettera, Giovanni [1 ]
Renna, Gilda [1 ]
机构
[1] Dipartimento Meccan Matemat & Management, Via Orabona 4, I-70125 Bari, Italy
关键词
electrospark deposition; ESD; coating technology; repairing; worn metal components; pulse fusion surfacing; spark hardening; spark toughening; metal substrates; MASS-TRANSFER TRENDS; SPARK DEPOSITION; WEAR BEHAVIOR; TRIBOLOGICAL PROPERTIES; CORROSION BEHAVIOR; TENSILE PROPERTIES; TI-6AL-4V ALLOY; BULK GLASSY; MICROSTRUCTURE; COATINGS;
D O I
10.3390/coatings12101536
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The need to use components with improved surface characteristics in relation to severe operating conditions, together with the aim of cost reduction associated with the replacement of damaged components, has led to an increasing use of coatings and repairing processes. The most common deposition processes are generally characterized by high equipment costs and, sometimes, by long deposition time. Furthermore, some repair technologies, especially those characterized by high heat input, are not suitable for alloys used in aerospace applications due to the degradation of their mechanical characteristics. In the last decades, a novel eco-friendly method capable of overcoming the limits set out above emerged: the electrospark deposition (ESD) technology. Thanks to its efficiency, simplicity, cost-effectiveness, and low heat input, this technology has proved to be suitable both for improving surface properties, such as thermo and wear resistance, higher hardness and corrosion resistance, and for the repair of high-value components. The aim of this review is to describe in detail some aspects of the ESD technique to understand the ESD processing preparation of alloys normally considered difficult to weld by traditional processes and to give some important clues to the readers to contribute to the defect-free repair of damaged areas and coatings deposition.
引用
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页数:28
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