Austenitic stainless steels (ASSs) have an excellent corrosion resistance but relatively-low hardness and yield strength [1,2], leading to limited usage in applications that high values of hardness and wear resistance is necessary for material surface. Therefore, surface properties such as hardness must be improved using appropriate techniques. Mechanical surface treatments such as ultrasonic s...

Indentat~on technque was used to characterize the mechanical properties (elastic modulus, hardness and toughness) both of PVD coatmgs and autocatallt~c chem~cal deposition ones. TIN and TiCN films m ere respectively depos~ted on a duple.: s t adess steel substrate using PVD technque. moreover a Nip films (P content about 8O6) and a NIPIB,C composite ones were used as comparison materials The ef...

A nanocrystalline layer was prepared on the surface of 34CrMo4 steel by time controlling shot peening (SP, i.e., 1, 5, 10, and 20 minutes). Field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) analysis, and transmission electron microscope (TEM) were applied to analyze the surface, cross-sections, and grain size of the specimens before and after SP. The electrochemical c...

Shot-peening is a mechanical surface treatment widely employed to enhance the fatigue life of metallic components by generating compressive residual stress fields below surface. These are mainly impacted selection process parameters. The aim this work propose hybrid approach conduct two predictive models: second-order model and feed-forward artificial neural network model. For purpose, 3D multi...

Modeling shot peening process is very complex as it involves the interaction of metallic surfaces with a large number of shots of very small diameter. Conventionally such problems are solved using the finite element software (such as ABAQUS) to predict the stresses and strains. However, the number of shots involved and the number of elements required in a real-life components for a 100% coverag...

One possibility to improve the fatigue life and strength of metallic materials is shot peening. However, at elevated temperatures, induced residual stresses may relax. To investigate influence peening on high-temperature behavior, isothermal tests were conducted shot-peened untreated samples gamma TiAl 48-2-2 750 °C in air. The material was characterized using EBSD, microhardness, stress analys...

To increase the tool life of fine blanking punches, this work investigates a combined solution approach consisting increasing mechanical strength substrate material by shot peening and deposition physical vapor (PVD) hard coatings. A powder metallurgical high-speed steel (HSS) is used as material. First, temperature-dependent relaxation behavior residual stresses strain-hardening shot-peened an...