Analysis of the initial cavitation erosion period of selected nickel alloys

5th International Conference Recent Trends in Structural Materials

Jasionowski, R.^1 ; Depczyski, W.^2 ; Zasada, D.^3

Faculty of Marine Engineering, Institute of Basic Technical Sciences, MaritimeUniversity of Szczecin, 2-4 Willowa Str, Szczecin

71-650, Poland^1

Faculty of Mechatronics and Mechanical Engineering, Kielce University OfTechnology, 7 Tysiaclecia Panstwa Polskiego Ave., Kielce

25-314, Poland^2

Faculty of Advanced Technology and Chemistry, Military University of Technology, 2 Gen. W. Urbanowicza Str., Warsaw

00-908, Poland^3

关键词: Cavitation damage;    Cavitation wear;    Contact points;    Incubation periods;    Mechanism of formation;    Nickel based alloy;    Surface layers;    Working liquid;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/461/1/012032/pdf
DOI  :  10.1088/1757-899X/461/1/012032

来源: IOP

【 摘 要 】

Cavitation wear resistance, of four different nickel-based alloy during the incubation period was investigated with the use of stream-impact device and results are presented in this paper. Four nickel alloys with excellent resistance corrosion very high corrosion resistance and very good mechanical properties were selected for the tests: Monel 400, Inconel 600, Incoloy 800H and Hasteloy C22. Nickel alloys examined for the period of 600 minutes. Mechanism of formation and destruction of the surface layer under working liquid influence is described. It was noticed, that first microcracks are formed on the grain boundaries, especially in the triple contact points. Effects of plastic strain were also noted on the surface of samples as a uplifting and collapsing in boundary area. It was stated, that among nickel alloys examined, a better resistance to cavitational erosion in initial period of cavitation damage has the alloys: Hasteloy C22 and Incoloy 800H.