Shot peening of TRIP780 steel: Experimental analysis and numerical simulation

Abstract

is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. This is an author-deposited version published in: https://sam.ensam.eu Handle ID ABSTRACTThis study aims at the experimental and numerical analysis of TRIP780 steel after conventional shot peening. TRIP steels exhibit a multiphase microstructure with martensitic transformation of the retained austenite during shot peening. In-depth experimental analysis are carried out with microhardness and X-ray diffraction. Residual stresses profiles are determined in the pseudo-ferritic phases (α + α′) and in the retained austenite γ. A representative finite element model of shot peening with a material behavior law describing the multiphase microstructure and the martensitic phase transformation during loading is proposed. The results are compared to experimental data and the effect of martensitic transformation is numerically investigated.

Prediction of residual stress fields after shot-peening of TRIP780 steel with second-order and artificial neural network models based on multi-impact finite element simulations

“…The first step in the current investigation was to prove the validity of the proposed finite element shot-peening model. This was carried out by comparing the predicted residual stress profiles (𝜎 11 − 𝜎 33 ) in one direction (X in-plane direction according to Figure 3 (c)) within TRIP780 steel to its corresponding experimental profiles [39] obtained by XRD technique and under similar shot-peening (SP) conditions: (1) D= 0.4 (mm), V= 60×10 3 (mm/s), C= 230 (%), α= 90 (c) (°) and ( 2) D= 0.6 (mm), V= 60×10 3 (mm/s), C= 270 (%), α= 90 (°). All the presented FE results were extracted using a post-processing script based on taking the average at nodes, at each depth with respect to the undeformed mesh, situated in an hexagonal zone corresponding to the 4 th range of the target component (hexagon of radius of 3×e) as depicted in Figure 4.…”

“…Concerning TRIP steels treated by shot-peening, only few studies have investigated the effect of shot-peening including phase transformation in different steel grades. Experimental studies analysed the residual stresses in the different phases such as austenite, ferrite if present, and created martensite, along with their evolving volume fractions [35] [36] [37] [38] [39]. For the modeling of shot-peening with phase transformation, Halilovič et al [40] developed a finite element model for laser shock peening on AISI 304 steel by using a material model developed by [34] and implemented in ABAQUS.…”

Experimental Analysis of the Shot Peening Particle Stream Using Particle Tracking and Digital Image Correlation Techniques

“…The information about the velocity of particles and their impact rate on a structure were useful to have predictive information about the initial conditions to apply to a multiimpact Finite Element model such as developed by [37], [38] or [39]. 3D measurements using two synchronized high-speed cameras or by using a mirror from another point of view, would be a perspective to obtain the complete velocity field and to focus on the particles close to the centerline compared to the ones at the edges of the stream.…”

Методика Проведення Експериментальних Досліджень Впливу Ударної Дії Дробинок На Стан Металевих Поверхонь

“…Більшість із них присвячено дослідженню зношуванню поверхонь при терті, наприклад [1,[4][5][6], а також обробці при ударі [7][8][9][10][11] для досягнення регулярних поверхневих мікроструктур [12]. На жаль, результати дослідження, отримані на використанні аналітичної моделі взаємодії окремої дробинки з пружно-пластичним півпростором [13][14][15][16][17][18][19][20][21], зокрема й чисельним моделюванням [22][23][24][25] проведені без глибокого узагальнення на технологічні параметри дії дробоструминного факела. Окрім цього, варто відмітити, що деякі параметри складного процесу дробоструміння взагалі неможливо отримати аналітично, а тільки експериментально.…”