Influence of water cavitation peening with aeration on fatigue behaviour of SAE1045 steel

Abstract Water cavitation peening (WCP) with aeration is a recent potential method in the surface enhancement techniques. In this method, a ventilation nozzle is adopted to improve the process capability of WCP by increasing the impact pressure, which is induced by the bubble collapse on the surface of components in the similar way as conventional shot peening. In this paper, fatigue tests were conducted on the both-edge-notched flat tensile specimens to assess the influences of WCP on fatigue behaviour of SAE1045 steel. The notched specimens were treated by WCP, and the compressive residual stress distributions in the superficial layer were measured by X-ray diffraction method. The tension–tension (R = Smin/Smax = 0.1, f = 10 Hz) fatigue tests and the fracture surfaces observation by scan electron microscopy (SEM) were conducted. The experimental results show that WCP can improve the fatigue life by inducing the residual compressive stress in the superficial layer of mechanical components.

[1]  H. Soyama.  Introduction of Compressive Residual Stress Using a Cavitating Jet in Air , 2004 .

[2]  M. Ramulu,et al.  Fatigue performance of high-pressure waterjet-peened aluminum alloy , 2002 .

[3]  R. Oba,et al.  Effect of aeration on superficial residual stress level of carburised and quenched gears treated by water cavitation peening , 2006 .

[4]  Hitoshi Soyama,et al.  Cavitation shotless peening for improvement of fatigue strength of carbonized steel , 2003 .

[5]  R. Oba,et al.  Improvement on the process capability of water cavitation peening by aeration , 2006 .

[6]  Masumi Saka,et al.  Improvement of Fatigue Strength of Aluminum Alloy by Cavitation Shotless Peening , 2002 .

[7]  Masumi Saka,et al.  Use of Cavitating Jet for Introducing Compressive Residual Stress , 2000 .

[8]  Hitoshi Soyama,et al.  High-Speed Observation of a Cavitating Jet in Air , 2005 .

[9]  T. Shih,et al.  Diagnosis of Oxide Films by Cavitation Micro-Jet Impact , 2003 .

[10]  R. Gnanamoorthy,et al.  Surface modification by oil jet peening in Al alloys, AA6063-T6 and AA6061-T4: Part 2: Surface morphology, erosion, and mass loss , 2006 .

[11]  R. Gnanamoorthy,et al.  Surface modification by oil jet peening in Al alloys, AA6063-T6 and AA6061-T4: Residual stress and hardness , 2006 .

[12]  Jenn‐Ming Yang,et al.  Laser shock peening on fatigue crack growth behaviour of aluminium alloy , 2004 .

[13]  S. Kim,et al.  Study on the cavitation erosion behavior of hardfacing alloys for nuclear power industry , 2003 .

[14]  R. Oba,et al.  Investigation of the influence of incidence angle on the process capability of water cavitation peening , 2006 .

[15]  H. Machida,et al.  Improvement of Residual Stress in Gear Using Water Peening by a Cavitation Jet Technique , 2002 .

[16]  Masumi Saka,et al.  Peening by the use of cavitation impacts for the improvement of fatigue strength , 2001 .