Effect of Solution Treatment Temperature upon the Cavitation Erosion Resistance of X5CrNi18-10 Stainless Steel

The specimens subjected to cavitation erosion were quenched from different temperatures (1000°C, 1050°C and 1100°C) but maintained the same time (25 min.) at the high temperature. The cavitation tests were made in the T2 device of the Timisoara Polytechnic University Cavitation Laboratory. This device respects integrally the recommendation of the ASTM G32-2010 Standard. The specimens microstructure and the area subjected to cavitation were examined with optic and SEM microcopies and hardness measurements. The differences arising on cavitation erosion resistance are explained through modifications of the crystalline grains dimensions, the chromium carbides proportion and some intermetallic phases not dissolved in austenite and of resistance to plastic deformation.Keywords: stainless steel, heat treatment, cavitation erosion

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Effect of Solution Treatment on Cavitation Erosion Resistance of Duplex Stainless Steel Surfacing Layers

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.324.21 ◽

2021 ◽

Vol 324 ◽

pp. 21-25

Author(s):

Zi Rui Wang ◽

Ye Feng Bao ◽

Qi Ning Song ◽

Ke Yang ◽

Yong Feng Jiang

Keyword(s):

Stainless Steel ◽

Duplex Stainless Steel ◽

Incubation Period ◽

Stainless Steels ◽

Cavitation Erosion ◽

Erosion Resistance ◽

Solution Treatment ◽

Duplex Stainless Steels ◽

Water Quenching ◽

Cavitation Erosion Resistance

In the present work, the possibility of using solution treatment to improve the cavitation erosion resistance of the duplex stainless steel surfacing layers was discussed. The effect of solution treatment on cavitation erosion resistance of duplex stainless steels was investigated. The results showed that the solution treatment can adjust the ratio of ferrite to austenite, reduce the precipitation content, and make the incubation period longer, leading to an increase in the cavitation erosion resistance of the duplex stainless steel surfacing layers. The sample treated at 900°C and water quenching was shown to have the best resistance to the absorption of the energy produced by cavitation erosion, and hence the best cavitation erosion resistance.

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Effect of heat treatment on corrosion and ultrasonic cavitation erosion resistance of AlSi10MnMg alloy

Materials Testing ◽

10.1515/mt-2020-620910 ◽

2020 ◽

Vol 62 (9) ◽

pp. 921-926

Author(s):

Ion Dragoş Uţu ◽

I. Mitelea ◽

I. Bordeașu ◽

F. Franţ

Keyword(s):

Solid Solution ◽

Solution Structure ◽

Artificial Aging ◽

Cavitation Erosion ◽

Erosion Resistance ◽

Eutectic Silicon ◽

Solution Treatment ◽

Mechanical Tests ◽

Ultrasonic Cavitation ◽

Cavitation Erosion Resistance

Abstract The investigated alloy is modified by casting with Sr in order to finish the eutectic silicon from microstructure and furthermore subjected to solution treatment followed by natural or artificial aging to improve the usage properties. Metallographic investigations and X-ray diffraction analyses showed that the heat treated microstructure consists of α- solid solution crystals with aluminum base, α + Si eutectic and intermetallic Al-Mn-Si phases. Mechanical tests and ultrasonic cavitation measurements showed that the highest mechanical characteristics and cavitation erosion resistance properties are obtained by applying the solution treatment followed by artificial aging. In contrast, electrochemical tests carried out in a saline concentration of 3.5 % NaCl in order to determine the corrosion rate, indicated that although there are no significant differences between the three structural states, a slight improvement was found in the corrosion behavior after applying the solution treatment followed by both natural and artificial aging. The phenomenon was demonstrated by shifting the values of corrosion currents from 2.66 μm/cm2 for the as-cast state, to 1.81 μm/cm2 and 1.52 μm/cm2, respectively, for the aged states. Finally, analysis of the cavitation eroded surface highlights the presence in the areas with α-solid solution structure of some flat-bottomed striped pinches, characteristic of fatigue fracture and of microcraters in the micro-zones where the fragile intermetallic phases were dislocated.

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