The residual stress, texture and surface changes in steel induced by cavitation

Mathias, Mark F.; Göcke, Annette; Pohl, M.

doi:10.1016/0043-1648(91)90302-b

Cited by 41 publications

(12 citation statements)

References 3 publications

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“…Because the dislocation structure having arisen in a cavitionally eroded austenitic steel is similar to that initiated as a result of shock loading, the degradation mechanism of materials under cavitation attack seems similar to the degradation mechanism under shock loading. Moreover, the results of residual stress, as well as lattice distortion, microhardness, topography and plastic deformation arising in the surface layer of steel during cavitation attack are similar to those produced by shot peening [1]. Thus, the phenomenon of cavitation can be used also to investigate and understand shock loading.…”

Section: Discussionmentioning

confidence: 72%

“…Hence, the dynamic load degradation resistance should be closely examined. The investigations of Mathias et al [1] have shown that the changes in mechanical properties, texture, topography and residual stress developing in the surface layer of examined material during a cavitation attack are comparable to those due to shot peening. Thus, cavitation degradation seems to be the method suitable for simulation of local dynamic degradation and for evaluation of material resistance to dynamic loading.…”

Section: Introductionmentioning

confidence: 89%

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An approach to evaluate the resistance of hard coatings to shock loading

Krella

2010

Surface and Coatings Technology

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Section: Discussionmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 89%

An approach to evaluate the resistance of hard coatings to shock loading

Krella

2010

Surface and Coatings Technology

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“…A peening process is typically to improve metal mechanical properties by generating surface compressive residual stresses, and ultrasonic cavitation peening is a metal peening process that utilizes the high pressure due to the cavitation process (bubble generation, growth, and collapse) induced by ultrasonic waves in liquids (typically water) [1][2][3][4][5][6], However, the previous investigations in the literature on ultrasonic cavitation peening have been limited, among which are those in Refs. [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…It has been found that residual stresses with appreciable values can be generated by ultrasonic cavitation peening on the workpiece surface under the investigated conditions [2]. [5], the effects of ultrasonic cavitation on residual stress, texture, material loss, lattice distortion, and microhardness for AISI 4140 and AISI 1045 steels have been studied. In Ref.…”

Section: Introductionmentioning

confidence: 99%

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Ultrasonic Cavitation Peening of Stainless Steel and Nickel Alloy

Gao

Wu²,

Liu

et al. 2013

Journal of Manufacturing Science and Engineering

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Ultrasonic cavitation peening is a peening process utilizing the high pressure induced by ultrasonic cavitation in liquids (typically water). In this paper, ultrasonic cavitation peening on stainless steel and nickel alloy has been studied. The workpiece surface microhardness, the microhardness variation at different depths, the workpiece surface profile, roughness, and morphology have been measured or obsen'ed. It has been found that for the studied situations, ultrasonic cavitation peening {at a sufficiently high horn vibration amplitude) can obviously enhance the workpiece surface hardness without significantly increasing the surface roughness. Under the investigated conditions, a suiface layer of more than around 50 ¡.im has been hardened under a horn vibration amplitude of~20nm.

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Comparative Study on CuZnAl and CuMnZnAlNiFe Shape Memdory Alloys Subjected to Cavitation–Erosion

2003

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After initial observations indicated that IIT using the Berkovich indenter was unable to produce any cracks in the laser-modified region, a cube corner indenter was used. Indentation was carried out for 5 different loads (400 mN, 200 mN, 100 mN, 50 mN, and 20 mN) in load-control mode, intended to determine the threshold load for cracking and resistance to fracture. Since a cube corner indenter is of much sharper geometry, the threshold load for cracking is much less and can be used for determining resistance to fracture of materials with toughness outside the regime of Berkovich or Vickers diamond [10,11]. Results were analyzed for maximum load-displacement during unloading.Both Berkovich and cube corner indentation impressions were analyzed by optical and scanning electron microscopy to determine cracking and/or separation of microstructural constituents and other features such as pile-up, sinkin, etc.The behavior of Cu-based shape memory alloys (SMA) subjected to cavitation±erosion has been studied at 22 and 5 C. CuZnAl alloys and Mn bronzes (CuMnZnAlNiFe) were tested by ultrasonic cavitation. The exposed samples were characterized through weight loss measures, scanning electron microscopy (SEM) and light microscopy (LM). The results of the tests at 22 C showed a higher resistance of CuZnAl alloys, particularly for the austenitic alloy (martensite start temperature (Ms) = -25 C), with a high reversibility of the martensitic transformation. In pseudoelastic Mn bronzes early martensite stabilisation was observed during the test, which is mainly attributed to the presence of precipitates. At 5 C the CuZnAl austenitic alloy showed a severe damage by intergranular cracking, while the rest of the alloys showed similar damage mechanisms.The term ªcavitationº derives from the latin word ªcavusº (hole), which means ªvoid formationº in fluid media. The formation of bubbles occurs as a result of the pressure reduction in a fluid below a critical value. As soon as the formed bubbles reach a condition of higher pressure, their implosion takes place. If the collapse of such bubbles occurs close to a solid surface, the material surface will be subjected to the local dissipation of a large energy amount. By the repeated occurrence of this process depending on the nature of the material, damage on the surface will eventually take place producing plastic deformation and volume loss. This removal of material caused by cavitation is called cavitation±erosion. The damage caused by cavitation±erosion can be observed in a large number of hydraulic components such as valves, propellers, hydraulic pumps, diesel engines, etc. SMA, principally from NiTi group, have showed high resistance to wear as well as to cavitation±erosion with exceptional long incubation periods (elapsed cavitation time without measurable weight loss). [1±6] This phenomenon has been understood by the capacity of these materials to absorb energy by a shape memory effect during bubble collapses. For

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The residual stress, texture and surface changes in steel induced by cavitation

Cited by 41 publications

References 3 publications

An approach to evaluate the resistance of hard coatings to shock loading

An approach to evaluate the resistance of hard coatings to shock loading

Ultrasonic Cavitation Peening of Stainless Steel and Nickel Alloy

Comparative Study on CuZnAl and CuMnZnAlNiFe Shape Memdory Alloys Subjected to Cavitation–Erosion

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