فهرس المقالات CK45 Steel

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  1 - Energy-Based Prediction of Low-Cycle Fatigue Life of CK45 Steel and SS316 Stainless Steel
  M Shariati H Mehrabi
  In this paper, low cycle fatigue life of CK45 steel and SS316 stainless steel under strain-controlled loading are experimentally investigated. In addition, the impact of mean strain and strain amplitude on the fatigue life and cyclic behavior of the materials are studie أکثر

  In this paper, low cycle fatigue life of CK45 steel and SS316 stainless steel under strain-controlled loading are experimentally investigated. In addition, the impact of mean strain and strain amplitude on the fatigue life and cyclic behavior of the materials are studied. Furthermore, it is attempted to predict fatigue life using energy and SWT damage parameters. The experimental results demonstrate that increase in strain amplitude decreases fatigue life for both materials, strain amplitude has a remarkable effect on fatigue life, and the impact of mean strain is approximately negligible. Furthermore, the energy damage parameter provides more accurate prediction of fatigue life for both materials. تفاصيل المقالة
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  2 - Predicting the Influence of Electrical Discharge Machining (EDM) Parameters on the Finished Work Surface in CK45 Steel
  Esmaeil Jafari Ahmad Afsari Sina Abedpour
  CK45 steel is a suitable material for the manufacturing of forging dies. This paper investigates the influence of electrical discharge machining (EDM) parameters including voltage, current, on-time and off-time on the microstructure of the machined surface of this mater أکثر

  CK45 steel is a suitable material for the manufacturing of forging dies. This paper investigates the influence of electrical discharge machining (EDM) parameters including voltage, current, on-time and off-time on the microstructure of the machined surface of this material. The process induces thermal stresses that in turn result in the generation of widespread micro-cracks on the surface of the part subjected to spark EDM. The influence of EDM parameters on the quality of the machined surface is explored by performing an extensive experimental program. The impact of EDM parameters on the surface roughness and the intensity of micro-cracks have been evaluated quantitatively using the test results and regression analysis. Predicting the relationship between EMD parameters and the surface quality provides practical means to appropriately decide on the adjustment of process control parameters to their optimum values and hence to achieve the desired surface quality at reasonable manufacturing times and cost. تفاصيل المقالة
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  3 - Characterization of Oxide Film Formed on Ck45 Steel by Plasma Electrolytic Oxidation Method
  S. Abuali Galedari م. موسوی خوئی
  Plasma electrolytic oxidation (PEO) is the new, environmentally and cost-effective method for coating the metals. This method vastly has been studied for coating Aluminum, Titanium and Magnesium and their alloys and recently for steel. In present study, Ck45 steel sampl أکثر

  Plasma electrolytic oxidation (PEO) is the new, environmentally and cost-effective method for coating the metals. This method vastly has been studied for coating Aluminum, Titanium and Magnesium and their alloys and recently for steel. In present study, Ck45 steel samples were coated by PEO method in order to improve corrosion resistance. During this process specimens were immerged in carbonate solution contains sodium dehydrogen phosphate (NaH2PO4) and sodium carbonate (Na2CO3) with PH equaled 8.3. Composition and microstructure of the coating were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The electrochemical corrosion behavior of coated and uncoated species was verified in 3.5% NaCl solution by potentiodynamic polarization technique. The result of XRD and SEM test showed that nanocrystale particles of Fe3O4 were successfully formed on the surface of samples while the average size of particles and phase were less than 800nm. Grain size was estimated about less than 80 nm. Corrosion test exhibited the remarkable improvement (about three times) in corrosion resistance of coated samples (16023 Ω) compared with those without coating (5200.4 Ω). تفاصيل المقالة
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  4 - Influence of EDM Characteristic Parameters on the Surface Microstructure in CK45 Alloy Steel
  سینا عابدپور اسماعیل جعفری احمد افسری سعید حدیدی مود
  Electro Discharge Machining (EDM) is a very efficient machining process widely used in manufacturing components of complicated geometry. Based on its nature, i.e. material removal by electric discharge, the process induces thermal stresses that in turn result in generat أکثر

  Electro Discharge Machining (EDM) is a very efficient machining process widely used in manufacturing components of complicated geometry. Based on its nature, i.e. material removal by electric discharge, the process induces thermal stresses that in turn result in generation of wide spread micro-cracks on the surface of the machined part. In this paper the influence of EDM characteristic parameters on the surface microstructure in CK45 alloy steel which is suitable for manufacturing of forging dies has been extensively investigated. An extensive experimental programme has been carried out to explore the role of various EDM parameters on the quality of the machined surface. The relation of EDM parameters has been evaluated quantitatively using the test results and regression analysis. Predicting the impact of EDM parameters on the surface quality as the outcome of this study provides means to appropriately decide on the adjustment of parameters to their optimum values and achieve the desired die surface quality at reasonable manufacturing time and cost. تفاصيل المقالة