This paper is devoted to the problem of wear resistance in square Si3N4 ceramic cutting inserts, which exhibit high hardness and strength, combination with brittleness, machining super alloys (e.g., a nickel-based alloy Inconel 718 type) for aviation purposes, when subjected increased mechanical thermal loads. Microtextures were proposed reduce intensity contact loads on pad between edge workpi...

Cold-rolled Inconel 718 with δ phase dispersion distribution was prepared and exhibited excellent superplasticity at 950°C a strain rate of 6 × 10−4 ~4 10−3 s−1. The elongation to failure 561% obtained 1 Superplastic deformation accelerates the recrystallization cold-rolled deformed microstructure, thus improving grain uniformity. dispersed promotes nucleation recrystallized grains pin boundari...

The realization of bimetallic structures is one the major challenges manufacturing industry, to this aim different technologies are employed, among these vacuum brazing presents some advantages: technology, in fact, relatively easy use and relative low temperature process time avoid formation brittle intermetallics thermally affected zones. An application technology regenerative thrust chamber ...

Inconel 718 (IN718) is a precipitation hardened nickel-base super-alloy exhibiting high strength and good corrosion resistance at elevated temperatures on the downside; it characterized by poor machinability. Abrasive water jet (AWJ) process offers potential method to machining difficult-to-cut materials such as IN718. The present work investigates influence of AWJ parameters surface roughness,...

The laser energy density was believed to control microstructure and mechanical properties of additive-manufactured Inconel 718 (IN718) alloy. However, in this study, remarkable differences were found the microstructures, tensile properties, fracture surfaces industrial IN718 alloy (with densities higher than 99.75%), which fabricated by Laser Powder Bed Fusion (LPBF) processes with almost ident...

In the present paper, Inconel 718 alloy was prepared by direct metal laser sintering. The bare post-processed through different heat-treatment routes, and changes in its metallurgical microstructural properties were investigated. comparison to alloy, grains overlapping region of heat-treated alloys became refined. strengthening phase γ’ γ” precipitations high alloys. Furthermore, cyclic oxidati...

The present study proposes an integrated prediction model for both shearing and ploughing constants the peripheral milling of Inconel 718 by using a preidentified mean normal friction coefficient. An equation is presented identification angle oblique cutting in milling. A simplified adopted obtaining shear strain tool given helix angle, radial rake honed edge radius. predicted from analytical M...

This paper focuses on analysis of tool life during milling nickel alloy Inconel 718. Several modifications one type carbide with different cutting edge finish adjustments (lapping, drag finishing) were proposed for These significantly influence properties (hardness, radius value, etc.). The toolpath geometry setup has a great chip formation and load characteristics strategies. tests performed b...

Investigation of the selective laser melting (SLM) process, using finite element method, to understand influences power and scanning speed on heat flow melt-pool dimensions is a challenging task. Most existing studies are focused study thin layer thickness comparative same materials under different manufacturing conditions. The present work analysis thermal cycles complex behavior high multi-la...