Rail grinding is a maintenance task performed in the field to return it profile and/or remove damage, however, can affect surface integrity of rail. In this paper, damage resistance three different ground rails (R260, R350HT and R400HT) was evaluated. samples were using same parameters low-traffic line field. The rail metallurgy then examined, white etching layer (WEL) formation wear rolling co...

This research studied the application of the response surface methodology (RSM) and central composite design (CCD) experiment in mathematical model and optimizes postweld heat treatment (PWHT). The material of study is a pressure vessel steel ASTM A516 grade 70 that is used for gas metal arc welding. PWHT parameters examined in this study included PWHT temperatures and time. The resulting mater...

Grain refinement through severe plastic deformation enables synthesis of ultrahigh-strength nanostructured materials. Two challenges exist in that context: First, deformation-driven grain refinement is limited by dynamic dislocation recovery and crystal coarsening due to capillary driving forces; second, grain boundary sliding and hence softening occur when the grain size approaches several nan...

The aim of the present research is to simulate the heat treatment process of the autogenous grinding (AG) shell liner of Cr-Mo steel in different quenching media (still air, air blowing, oil and water) using ABAQUS software, in order to calculate the cooling curves. In this regard, the microstructure and hardness for each arbitrary point within the mill liner's bulk could be predicted based on ...

In this work, the effects of micro-alloying Mn, Ni, and Si on microstructure mechanical properties high-carbon pearlite steels were investigated. The results indicated that addition solely Ni to pearlitic steel can enhance strength through refinement interlamellar spacing, but work-hardening in ferrite colony may be delayed, leading a reduction area. multiple additions increase Mn contents bene...

Non-uniform cooling conditions within a casting lead to locally differing microstructures, which result in locally differing mechanical properties. These have a tremendous impact on the behavior of the parts under their application load conditions and regarding their life time. The virtual development of castings can, therefore, only be effective when the process simulation is integrated into i...