Use of Cavitating Jet for Introducing Compressive Residual StressSource: Journal of Manufacturing Science and Engineering:;2000:;volume( 122 ):;issue: 001::page 83DOI: 10.1115/1.538911Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In an attempt to strengthen the surface of materials, the potential of using a cavitating jet to form compressive residual stress has been investigated. Introducing compressive residual stress to a material surface provides improvement of the fatigue strength and resistance to stress corrosion cracking. In general, cavitation causes damage to hydraulic machinery. However, cavitation impact can be used to form compressive residual stress in the same way as shot peening. In the initial stage, when cavitation erosion progresses, only plastic deformation, without mass loss, takes place on the material surface. Thus, it is possible to form compressive residual stress without any damage by considering the intensity and exposure time of the cavitation attack. Cavitation is also induced by ultrasonic, high-speed water tunnel and high-speed submerged water jet, i.e., a cavitating jet. The great advantage of a cavitating jet is that the jet causes the cavitation wherever the cavitation impact is required. To obtain the optimum condition for the formation of compressive residual stress by using a cavitating jet, the residual stresses on stainless steel (JIS SUS304 and SUS316) and also copper (JIS C1100) have been examined by changing the exposure time of the cavitating jet. The in-plane normal stresses were measured in three different directions on the surface plane using the X-ray diffraction method, allowing for the principal stresses to be calculated. Both of the principal stresses are found changing from tension to compression within a 10 s exposure to the cavitating jet. The compressive residual stress as a result of the cavitating jet was found to be saturated after a certain time, but it starts decreasing, and finally, it approaches zero asymptotically. It could be verified in the present study that it was possible to form compressive residual stress by using a cavitating jet, and the optimum processing time could also be realized. The great difference between the water jet in water and air has also been shown in this regard. [S1087-1357(00)00501-3]
keyword(s): Stress , Cavitation , Water , Shot peening , Surfaces (Materials) , Pressure , Residual stresses , Cavitation erosion AND X-ray diffraction ,
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contributor author | H. Soyama | |
contributor author | J. D. Park | |
contributor author | M. Saka | |
date accessioned | 2017-05-09T00:02:57Z | |
date available | 2017-05-09T00:02:57Z | |
date copyright | February, 2000 | |
date issued | 2000 | |
identifier issn | 1087-1357 | |
identifier other | JMSEFK-27355#83_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/124010 | |
description abstract | In an attempt to strengthen the surface of materials, the potential of using a cavitating jet to form compressive residual stress has been investigated. Introducing compressive residual stress to a material surface provides improvement of the fatigue strength and resistance to stress corrosion cracking. In general, cavitation causes damage to hydraulic machinery. However, cavitation impact can be used to form compressive residual stress in the same way as shot peening. In the initial stage, when cavitation erosion progresses, only plastic deformation, without mass loss, takes place on the material surface. Thus, it is possible to form compressive residual stress without any damage by considering the intensity and exposure time of the cavitation attack. Cavitation is also induced by ultrasonic, high-speed water tunnel and high-speed submerged water jet, i.e., a cavitating jet. The great advantage of a cavitating jet is that the jet causes the cavitation wherever the cavitation impact is required. To obtain the optimum condition for the formation of compressive residual stress by using a cavitating jet, the residual stresses on stainless steel (JIS SUS304 and SUS316) and also copper (JIS C1100) have been examined by changing the exposure time of the cavitating jet. The in-plane normal stresses were measured in three different directions on the surface plane using the X-ray diffraction method, allowing for the principal stresses to be calculated. Both of the principal stresses are found changing from tension to compression within a 10 s exposure to the cavitating jet. The compressive residual stress as a result of the cavitating jet was found to be saturated after a certain time, but it starts decreasing, and finally, it approaches zero asymptotically. It could be verified in the present study that it was possible to form compressive residual stress by using a cavitating jet, and the optimum processing time could also be realized. The great difference between the water jet in water and air has also been shown in this regard. [S1087-1357(00)00501-3] | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Use of Cavitating Jet for Introducing Compressive Residual Stress | |
type | Journal Paper | |
journal volume | 122 | |
journal issue | 1 | |
journal title | Journal of Manufacturing Science and Engineering | |
identifier doi | 10.1115/1.538911 | |
journal fristpage | 83 | |
journal lastpage | 89 | |
identifier eissn | 1528-8935 | |
keywords | Stress | |
keywords | Cavitation | |
keywords | Water | |
keywords | Shot peening | |
keywords | Surfaces (Materials) | |
keywords | Pressure | |
keywords | Residual stresses | |
keywords | Cavitation erosion AND X-ray diffraction | |
tree | Journal of Manufacturing Science and Engineering:;2000:;volume( 122 ):;issue: 001 | |
contenttype | Fulltext |