Abstract
In this paper, the failure mechanism and phase transformation process of 304 stainless steel during the erosion wear process were studied with a rotary erosion wear test device. The surface morphologies of the worn 304 stainless steel were investigated by scanning electron microscopy (SEM). The metallographic structures of the nonworn and worn 304 stainless steel were analyzed by optical microscope (OM) and transmission electron microscopy (TEM). In addition, the surface hardness on different areas of the sample was also measured. The results demonstrated that the failure mechanism of 304 stainless steel during the process of erosion wear was cutting and spalling caused by plastic deformation. The high-density dislocations move along the slip planes between slip lines, which resulted in the formation of martensite phase between the slip lines. Meanwhile, the martensitic transformation on the worn surface caused by severe plastic deformation was the coordination of dislocation martensite and twin martensite.
Highlights
Due to its excellent mechanical properties such as corrosion resistance, heat resistance and low-temperature strength, 304 stainless steel has been widely used in aerospace, ship and marine engineering, chemical and other fields [1,2]
The failure mechanism and phase transformation of 304 stainless steel during erosion wear were investigated in this study
(1) The erosion wear of 304 stainless steel was caused by the relative movement of 304 stainless steel and slurry
Summary
Due to its excellent mechanical properties such as corrosion resistance, heat resistance and low-temperature strength, 304 stainless steel has been widely used in aerospace, ship and marine engineering, chemical and other fields [1,2]. It is of great significance to study the failure process of erosion wear on 304 stainless steel for revealing the failure mechanism, proposing the improvement measures and improving the enterprise efficiency. Erosion wear failure of 304 stainless steel has brought serious economic losses. Huttunen-Saarivirta et al studied the erosion wear mechanism of 304 L stainless steel in the condition with sand and ash [10]. Their results showed that the loss of 304 L stainless steel was mainly caused. The surface morphologies of stainless steel was conducted using a rotary erosion wear test device. The failure mechanism and microstructure transformation mechanism mechanism of 304 stainless steel during erosion wear were revealed.
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