Strengthening Performance Optimization of Single Ball Impact Treatment by Evaluating Residual Stress

Abstract

Residual stress plays an essential role in affecting the strengthening performance by a surface treatment. Studying the impact of a single ball on a target surface is the basis of shot peening technology in order to obtain the distribution of the residual stress, and to optimize the processing parameters. In this paper, a numerical model has been developed to represent single ball impacts on high manganese steel by considering different processing parameters. It was found that by increasing the ball diameter and impact velocity, the depth of maximum residual compressive stress and the depth of the residual compressive stress layer became significantly enlarged due to increasing kinetic energy of the impacting ball. It was also found from simulation that with an increase in ball impact angle, the maximum residual compressive stress, the depth of maximum residual compressive stress and the depth of the residual compressive stress layer were significantly improved; an exception was the surface residual compressive stress, which showed a decreasing trend. Moreover, by employing quantitative analysis with the entropy method, it was found that within the range of processing parameters considered in the simulation, it is recommended to use a ball with a diameter of 0.6 mm to impact the target, with a velocity of 80 m/s and an angle of 90° for the best strengthening performance.

State of the Art and Perspectives on Surface-Strengthening Process and Associated Mechanisms by Shot Peening

“…Finite Element Method (FEM) is an important technique in computational mechanics; it is a numerical technique that seeks to approximate the solution of partial differential equations by dividing complex problems into smaller elements that can be solved mutually [54]. The method can be used to establish a numerical model that matches the actual shot peening situation, to simulate the dynamic process accurately, to analyze the residual compressive stress field and surface roughness of the target material, and to explore the shot peening enhancement mechanism [8,17]. Through numerical simulation, time and cost can be saved, and the best combination of shot peening process parameters can be quickly determined, providing guidance for further shot peening experiments.…”

“…The machinery industry has seen rapid development in recent years, leading to increased demands for improved performance in mechanical parts in various industries such as defense, transportation, power energy, and engineering machinery [1][2][3][4][5]. Fatigue failure and wear failure, which account for 80% of all mechanical part failures, usually originate from the surface [6][7][8][9][10]. Thus, surface-strengthening technologies are required to improve the quality of mechanical parts and enhance their resistance to fatigue and wear, resulting in a longer service life [11][12][13][14][15].…”

Model Development of Stress Intensity Factor on 7057T6 Aluminum Alloy Using Extended Finite Element Method

“…For the industrial purpose, the quality of the essential parts in related equipment is increasingly needed to be improved [1][2][3][4][5], and with the advancements in information technology, advanced manufacturing engineering, and the new energy industry, enhancing the stability and performance of core parts has become increasingly crucial [6][7][8][9]. The distribution of stress and resulting fractures on the surface and subsurface of these parts can greatly impact their lifespan [10][11][12][13].…”

Formation of Thick Immersion Coatings and Residual Stress Evaluation in the System ZrB2–ZrO2: Experimental and Numerical Investigation

“…Various residual stress measurement methods have been proposed for experimental studies, including optical, X-ray, and other approaches [ 17 , 18 ]. Theoretical studies employ various numerical models [ 19 , 20 , 21 ] and analytical models [ 22 , 23 , 24 , 25 ].…”