Shot Peening Using Wet Blasting Machine with a Wide Nozzle

Seiki Sakoda; Katsuji Tosha

doi:10.4028/www.scientific.net/MSF.614.163

Paper Titles

A Method for Improving Compressive Residual Stress of Small Holes Surface by Water-Jet Cavitation Peening
p.137

Thermal Mechanical Behaviors and Microstructure Characteristics in Twin-Roll-Casting Process of Magnesium Alloy AZ31
p.143

Inside Residual Stress Analysis of Carburizing-Nitriding Quenching Spur Gear by Neutron Diffraction Method
p.149

Strain Rate Evolution in Aluminium Alloy Measured by ESPI during Tensile Test
p.155

Shot Peening Using Wet Blasting Machine with a Wide Nozzle
p.163

Visualization of Stress Distribution Using Smart Mechanoluminescence Sensor
p.169

Snoek Relaxation in bcc Metals and High Damping β-Ti Alloys
p.175

Abrupt Softening Phenomenon in a Shape Memory CuAlNi Single Crystal under Uniaxial Compression
p.181

Comparison of Surface Nanostructured Electrodeposited Cu Produced from Different Power Types: Microstructure and Tensile Properties
p.189

HomeMaterials Science ForumMaterials Science Forum Vol. 614Shot Peening Using Wet Blasting Machine with a...

Shot Peening Using Wet Blasting Machine with a Wide Nozzle

Abstract:

This paper describes the influence of shot peening on of the peened surface and fatigue strength. Shot peening was performed by a wet blasting machine with a wide nozzle. At first, influences of particle size and geometry on characteristic values such as surface roughness, residual stress, FWHM, and Vickers hardness were examined, and then fatigue strength was studied on the peened materials. The material is a medium carbon steel (C:0.45%, 180HV) and the peening particles are alumina and glass beads. The following results are shown in this paper: (1) On the specimen a width of 83% of the wide nozzle is peened uniformly judging from chatterings of FWHM, compressive residual stresses and surface roughness. (2) Surface roughness, compression residual stress, FWHM and the maximum hardness increase with increasing particle size except for the case of 57μm particles; the maximum values are 0.52μm, 390MPa, 2.15deg, 205.6HV respectively. (3) Fatigue strength is improved using alumina and glass beads by 20% and 15%. (4) The peening process using a wide nozzle can effectively improve fatigue strength.