A 3D multi-scratch test model for characterizing material removal regimes in 5083-Al alloy

Abstract

This study addresses the sensitivity of material removal regimes in 5083-Aluminum alloy to interactions mechanisms generated during Multi-Scratch Test (MST). A testing device using three conical indenters was firstly developed. Four attack angles and four normal loads ranging, respectively, in 10-60° and 10-25 N, were considered for conducting the experimental trials. The scratch velocity was kept constant to 210 mm min -1 and the maximum scratch distance to 25 mm. The model, developed upon ABAQUS/Explicit, uses JohnsonCook approach for describing both material behavior and damage evolution. Single Scratch Test (SST) and MST reveal same wear regimes, namely, (i) "ploughing", (ii) "transition", and (iii) "cutting" whereas a significant difference was observed in the material removal maps.While ploughing domain neatly decreases to the detriment of transition domain when passing from SST to MST, cutting domains still remain quite comparable. The indenter attack angle is depicted as the most dominant factor in apparent friction coefficient. The three dominating regimes were successfully predicted, using the FE model, in close correlation with tribological parameters. The model was found very useful to highlight the significant role of the separation distance on controlling material flow and damage within the grooves' junction.

Proposal of Characterization Procedure of Metal–Graphite Interface Strength in Compacted Graphite Iron

“…It was also observed that the friction coefficient was reduced, and circumferential cracks developed around the particles. The failure modes are in accordance with simulations made by several researchers [ 14 , 15 , 16 ]. However, the models are focused on continuous and homogeneous materials free of defects, whereby the stress field in front of the tool has not been reported, nor the interaction with weaker particles, such as graphite.…”

Laser Peening Analysis of Aluminum 5083: A Finite Element Study

“…The properties of Al 5083 used here were adopted from Refs. [29,30] for the dynamic response of Al 5083 and are listed in Table 1. To enhance the accuracy of the model as well as facilitate obtaining a converged plastic strain distribution, a finer mesh was used in and around the pulse area where elements of 0.05 mm × 0.05 mm × 0.03 mm were chosen (Figure 1).…”

Modelling of ploughing in a single-asperity sliding contact using material point method

“…Traditionally, mesh-based finite element methods (FEM) have been preferred to model single asperity sliding in scratch tests. In modelling a highly dynamic and large scale deformation problem such as scratching, the selected explicit FE packages have used adaptive remeshing, element deletion and differential meshing to deal with problems of element distortion and high computational cost [10][11][12][13]. Ploughing models in the commercial FE packages have mostly used time-independent bilinear elastic-linearly hardening and Johnson-Cook material models and Columbic frictional contact at the interface [14,15].…”