Incorporating the principles of shot peening for a better understanding of surface mechanical attrition treatment (SMAT) by simulations and experiments

2017 ◽  
Vol 116 ◽  
pp. 365-373 ◽  
Author(s):  
Asghar Heydari Astaraee ◽  
Reza Miresmaeili ◽  
Sara Bagherifard ◽  
Mario Guagliano ◽  
Mahmood Aliofkhazraei
Keyword(s):  
Shot Peening ◽  
Surface Mechanical Attrition Treatment ◽  
Mechanical Attrition

scholarly journals Comparison between Conventional Shot Peening (SP) and Surface Mechanical Attrition Treatment (SMAT) on a Titanium Alloy

2014 ◽  
Vol 996 ◽  
pp. 964-968 ◽  
Author(s):  
Donaro Gallitelli ◽  
Delphine Retraint ◽  
Emmanuelle Rouhaud
Keyword(s):  
Experimental Data ◽  
Residual Stress ◽  
Titanium Alloy ◽  
Shot Peening ◽  
Surface Characteristics ◽  
Surface Mechanical Attrition Treatment ◽  
Mechanical Attrition ◽  
Stress Profiles ◽  
Stress States ◽  
Analytical Approaches

In this paper the residual stress states induced by conventional shot peening (SP) and surface mechanical attrition treatment (SMAT) are compared. The treated part correspond to plates made of a titanium alloy. Different intensities of these two mechanical treatments are first considered: their influence on the surface characteristics (roughness, hardness...) is studied. These experimental data are then used to develop a model for the residual stress profiles with dimensional analysis, Experimental and analytical approaches are then discussed.

scholarly journals EXPERIMENTAL INVESTIGATION ON THE EFFECTS OF SURFACE MECHANICAL ATTRITION TREATMENT ON THE SURFACE OF THE ALUMINUM ALLOY

2021 ◽  
Vol 10 (1) ◽  
pp. 101-108
Author(s):  
Pham Quang Trung ◽  
To Dinh Kha
Keyword(s):  
Plastic Deformation ◽  
Shot Peening ◽  
Optical Microscope ◽  
Surface Mechanical Attrition Treatment ◽  
Mechanical Attrition ◽  
Experimental Parameters ◽  
Aluminum Sample ◽  
Ultrasonic Shot Peening ◽  
The Mean ◽  
Steel Balls

Surface mechanical attrition treatment (SMAT) or ultrasonic shot peening method improves mechanical properties of metallic materials by causing the plastic deformation on their surface layer of the workpiece. In this research, an ultrasonic generator, an ultrasonic booster, a sonotrode, one hundred steel balls with the mean diameter of 1 mm, an optical microscope, an automatic roughness meter, and other supporting accessories are employed to conduct the experiment. The effect of shot peening time of the ultrasonic shot peening method on the surface coverage and the roughness of the treated aluminum sample A7075 is systematically investigated. The study reveals that shot peening time has a significant effect on the coverage and the surface roughness of the treated samples. The surface of sample is rougher with the increasing of shot peening time and the surface is full coverage after shot peening in 35s. The results of this study indicate that the method of surface mechanical attrition (SMAT) or ultrasonic shot peening is an effective method to induce the plastic deformation on the material. It also shows that this is a promising method to investigate the effects of experimental parameters on the microstructure, properties, and fatigue life of the material.

Ultrasonic Evaluation of Compressive Residual Stress of Surface Treated Metals

2005 ◽  
Vol 490-491 ◽  
pp. 184-189 ◽  
Author(s):  
Farid Belahcene ◽  
Xiaolai Zhou ◽  
Jian Lu
Keyword(s):  
Experimental Data ◽  
Residual Stresses ◽  
Nondestructive Evaluation ◽  
Subsurface Layer ◽  
Surface Mechanical Attrition Treatment ◽  
Shallow Subsurface ◽  
Ultrasonic Evaluation ◽  
Mechanical Attrition ◽  
Machine Parts ◽  
Compressive Residual Stresses

Shot peening is an effective method of improving fatigue performance of machine parts in the industry by producing a thin surface layer of compressive residual stresses that prevents crack initiation and retards crack growth during service. Nondestructive evaluation of the prevailing compressive residual stresses in the shallow subsurface layer is realized by the critically refracted longitudinal (Lcr) waves. This paper presents experimental data obtained on SMAT (surface mechanical attrition treatment) steel alloy S355 sample. Comparative travel-time shows that there are statistically significant differences in treated and untreated specimen. With knowledge of the acoustoelastic constants which are obtained by a test calibration, the experimental data indicates that compressive residual stresses are distributed near subsurface (hundreds of micron). These stress results show that the Lcr technique is efficient for evaluation of residual stresses after the surface treatment.

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