Jurnal Tribologi 25 (2020) 102-118 Received 11 February 2020; received in revised form 19 March 2020; accepted 9 April 2020. To cite this article: Franz et al. (2020). Finite element modeling of ASTM-G98 galling test – Numerical study of stress distributions in stainless steel specimens. Jurnal Tribologi 25, pp.102-118. Finite element modeling of ASTM-G98 galling test – Numerical study of stress distributions in stainless steel specimens Gérald Franz 1* , Kofi Edoh Agode 1 , Stéphane Panier 1 , Thibault Lesage 2 1 Université de Picardie Jules Verne, Laboratoire des Technologies Innovantes, EA3899, Avenue des Facultés, Le Bailly, 80025 Amiens, FRANCE. 2 UTC, Laboratoire Roberval, UMR CNRS 7337, Centre de Recherche Royallieu, 60203 Compiègne, FRANCE. * Corresponding author: Gerald.franz@u-picardie.fr KEYWORDS ABSTRACT Adhesive wear Austenitic steel Finite element modeling Galling Stress analysis Galling, defined as a severe kind of adhesive wear encountered when friction occurs between two sliding surfaces under sufficient load, is a complex multiscale and multi-physics phenomenon still not thoroughly understood. Its initiation and propagation is impacted by different factors related to microstructure, surface defects or chemical composition. Currently, a normalized galling test, denoted ASTM G-98, can be used to determine experimentally a threshold galling stress of material couples. A three-dimensional finite element modeling, using ABAQUS, of this tribological test has been carried out in this work in order to investigate the mechanisms appearing during galling of 316L stainless steel in particular. 1.0 INTRODUCTION When two loaded mating surfaces slide with respect to each other, a form of surface damage, caused by microscopic transfer of material between metallic surfaces usually called galling, can be observed. It frequently occurs in high load and slow relative motion applications, but can appear even at low stresses and high velocities. In the literature, other terms like adhesive wear, scuffing, scoring or seizure can be previously found to describe damage similar to galling (Ives et al., 1987; Peterson and Winer, 1989). However, unlike other forms of wear, galling can’t be considered as a gradual process. It occurs suddenly and evolves quickly, altering the surface integrity (material transfer, wear debris…) of the mechanical components, and consequently degrading their tribological properties. The current definition of galling has been established in