Abstract:

High performance manufacturing by surface modification has been developed as a precise manufacturing process of creating a functional surface layer of desired properties on the components, which is characterized by an integrated manufacturing of both properties and geometries for the high-performance components. The manufacturing processes of surface modification may be pre-selected according to the geometry features and material characteristics designed on basis of the desired properties of the components with a functional surface layer. Subsequently, processing loads of such as thermal, mechanical, chemical nature or a combination of them can be determined with mass and energy input conditions from the selected surface modification techniques for the manufacturing. Due to reduced multi-source coupled constraints from geometrical, structural, physical and chemical aspects by the surface modification, an adjustable material loading can be derived for desired processing loads on which the material loading is a process-independent description of the processing loads by stress and stain field, temperature field and/or chemical potential field in the manufactured components. Correspondingly, an inherent correlation of surface integrity change to material loading by posting the process signatures can be established for the components. Finally, a precise manufacturing by creating a functional surface layer of desired properties on the components is thus achievable based on the relation model between controllable surface integrity and high performance. It is concluded that, the principle of high performance manufacturing by surface modification is essentially composed of surface integrity formation mechanism, assessment method and resulting properties improvement for high-performance components. The principal framework proposed for high performance manufacturing by surface modification is therefore promising to solve inverse problem of manufacturing based on a knowledge-based way rather than iterative way by trial and error.

Key words: manufacturing principle, manufacturing process, surface integrity, surface layer, high performance manufacturing