Different Aspects of Cavitation Damages in Some Stainless Steels

Cavitation is an important factor in many areas of science and engineering, including acoustics, chemistry and hydraulics. In this paper the authors analyze the manner of cavitation damages in different samples of stainless steels. Cavitation destruction was performed in a magnetostrictive vibrating apparatus in Laboratory of Polytechnic University of Timisoara, Romania. Cavitation erosion behaviour was appreciated considering macrostructural analysis (both quantitative and qualitative) made at stereomicroscope type OLYMPUS equipped with QuickMicrophoto 2.2 software and structural analysis at scaning electron microscope (SEM) at Philips SEM microscope. Finally conclusions regarding specific structural features of cavitation at stainless steels were revealed

Stereomicroscopic Analysis of ECAE Processed Mg-Zn-Zr alloy

Lately, a growing volume of research has been conducted on studying the effects of equal channel angular extrusion processing. Equal channel angular extrusion (ECAE) or equal channel angular pressing (ECAP) is a severe plastic deformation (SPD) technique, which presses the test materials through a die with two channels which are equal in cross section and intersecting at a certain angle. After the deformation, the test materials will still retain its original cross-section being able to repeat the process to many cycles. This method improves the mechanical properties of the processed materials because of the ultrafine grained structures resulted. Present paper intends to make a qualitative investigation of the Mg-Zn-Zr samples processed through ECAE

Structural Analysis of Cavitation for Different Stainless Steels

The cavitation phenomenon is currently approaching all areas of technology and modern industry, where are fluid in motion. In this paper cavitational erosion was conducted on different samples of stainless steels. The cavitation were performed in magnetostrictive vibrating apparatus at Cavitation Laboratory (Polytechnic University of Timisoara). The present paper intends to identify specific structural features in stainless steels. Several investigations were done: macrostructural analysis (Olympus SZX57), scaning electron microscope (Philips SEM) and X-ray diffraction (D8 ADVANCE). After quantitative and qualitative investigations structural features were put in evidence on experimental stainless steels

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Microstructural and calorimetric analysis of ZK60 alloy processed by ECAP

In the last years many research efforts have been made in order to extend the application of wrought magnesium to structural components. One of the methods to improve the mechanical properties of the processed materials is through severe plastic deformation (SPD). ZK60 magnesium alloy samples were subjected to 6 passes of equal-channel angular pressing (ECAP) decreasing the temperature after the fourth pass, following an alternative route A. The structural characterization was realized by microstructural evolution using Oriented Image Microscopy (OIM) and XRD analysis. Differential Scanning Calorimetry (DSC) was used to estimate the stored energy and the recrystallization temperature after each ECAP pass.Postprint (published version

Microstructural, thermical and mechanical characterization of ZK60 alloy processed through ECAP

Postprint (published version

Calorimetric analysis of a Mg-Zn-Zr alloy processed by equal channel angular pressing via route A

Being the lightest structural element, magnesium a nd its alloys has attracted significant interest in the last years, but because of its hexa gonal close packed structure, magnesium presents relatively low strength and ductility. One of the m ethods to improve the mechanical properties of the processed materials is through Severe Plastic D eformation (SPD). ZK60 magnesium alloy samples were subjected to 4 passes of equal-channel angular pressing (ECAP) at a processing temperature of 250°C, following route A. The micros tructure was determined with an Olympus BX51 optical microscope. Differential Scanning Calo rimetry (DSC) was used to estimate the stored energy and the recrystallization temperature after each ECAP passPeer Reviewe

Microstructural and calorimetric analysis of ZK60 alloy processed by ECAP

In the last years many research efforts have been made in order to extend the application of wrought magnesium to structural components. One of the methods to improve the mechanical properties of the processed materials is through severe plastic deformation (SPD). ZK60 magnesium alloy samples were subjected to 6 passes of equal-channel angular pressing (ECAP) decreasing the temperature after the fourth pass, following an alternative route A. The structural characterization was realized by microstructural evolution using Oriented Image Microscopy (OIM) and XRD analysis. Differential Scanning Calorimetry (DSC) was used to estimate the stored energy and the recrystallization temperature after each ECAP pass