The Effect of the Conditions of Shot Peening the Inconel 718 Nickel Alloy on the Geometrical Structure of the Surface

Abstract

This article presents the research results of roughness and topography of the surface of Inconel 718 nickel alloy after shot peening. The evaluation of stereometric properties of the surface layer of the examined material was performed based on the amplitude, height and Abbott-Firestone curve parameters. The shot peening was carried out on the impulse shot peening stand. The impact energy E z , distance between the traces x s and the ball diameter d k were changed in the range: E z = 60 ÷ 240 mJ, x s = 0,15 ÷ 0,5 mm, d k = 3,95 ÷ 12,45 mm. The T8000 RC 120-140 device of the Hommel-Etamic company, along with the software, was used for measuring the surface roughness and for determining the material bearing curve. As a result of the machining, the surface roughness was reduced and the selected functional parameters were improved.

Surface integrity after post processing of EDM processed Inconel 718 shaft

“…Further improvements of the surface roughness could probably be achieved if an even smaller diameter of the shot peening media is to be selected. This is in parity with the results reported by Zaleski et al who investigated the influence of impact energy and shot size [35].…”

Strength Analysis of Lap Joints in Aerospace Structural Materials

“…An important step in the design and fabrication of a lap joint using a sealant is proper substrate preparation. Important substrate preparation methods for joining modern structural materials include machining (grinding [17], burnishing [18][19][20], brushing [21,22]), chemical [23], electrochemical [24], ozone treatment [25] and others. As a rule, these processes are designed to develop the surface texture.…”

Areal Analysis Investigation of Selective Laser Melting Parts

“…The surface quality of SLM is a crucial aspect to consider for the fabrication of functional and aesthetic components. Typically, other post-processing operations must be performed to enhance the surface quality of selective laser-melted (SLMed) parts, such as shoot peening [23,24], sandblasting [25], machining [26,27], and barrel finishing (BF) [28,29]. Such operations improve the surface in terms of roughness; measurement of the surface state during these processes is necessary to evaluate the evolution of the surface morphology and to understand when to stop the finishing process.…”