In the production of high speed steel, the rolling a ects the micro-structure of the steel, which in turn in uences the mechanical properties. Speci cally, the distribution of carbide is essential, since cracks propagate within the carbide agglomerations. In current quality control, the properties of the steel are assessed manually by comparison with a standard chart, containing representative ...

objective(s):  titanium oxides are known to be appropriate hemocompatible materials which are suggested as coatings for blood-contacting devices. little is known about the influence of nanometric crystal structure, layer thickness, and semiconducting characteristics of tio2 on blood hemostasis.   materials and methods: having used sol-gel dip coating method in this study, tio2 thin films were d...

The composite of multi-layer steel structure module and frame, as an important design form in Chinese house construction, is widely used the architectural houses. frame building are different from traditional. This kind mechanism adopts prefabricated type, which has advantages fast construction speed few limiting factors, plays a very guiding role modern construction. Based on this, this articl...

In the present study, the Weldability and microstructure of dissimilar welds of AISI 347austenitic stainless steel to ASTM A335 low alloy steel was investigated. For this purpose, gas tungsten arc welding process and two filler metals including ERNICr-3 and ER309L were used. After welding, the microstructure of the different zones of each joint, including weld metals, heat affected zone (HAZ) 1...

The objective of this work is to study the effectiveness of an advanced coating material, polyurea, as a blast mitigation tool for steel components. The response of polyurea coated steel components under blast loading is studied using the explicit LS-DYNA code with appropriate loading time histories supplied using a computational fluid dynamics (CFD) code developed at Penn State University, PUM...

AET (acoustic emission tomography) is a new visualization location method for inspecting and locating the internal damages in the structures. In this paper, the AET is applied to detect and visualize damage source locations in the Q235B steel structure to validate its effectiveness. Firstly, the ABAQUS/Explicit simulation model of the steel structure with one damaged circle in its center is bui...

bullwhip effect phenomenon is what reduces the efficiency of the supply chain. the effect occurs when demand changes in the supply chain face with a lot of volatility. so far, several key factors have been identified as causes of this phenomenon. since the steel industry, is the basic one, its efficiency is of great importance. therefore, in this study influencing factors on bullwhip effect in ...

pullback test has no scrupulous theoretical establishment. it is based on the hypothesis that the response ofthe structure can be related to the response of an equivalent single degree-of-freedom (sdof) system. this implies thatthe response is controlled by a single mode. in fact, the steel frame of each safe room, which is introduced within theunreinforced masonry buildings for protecting the ...

The structure and properties of the passive film formed on the surface of AISI 316 stainless steel in aqueous ethanoic acid have been investigated using EIS. Experiments were carried out at 30 oC in different concentrations of ethanoic acid. Effects on the film properties due to the change of electrode potential, exposure durations and addition of chloride ions to the electrolyte were also stud...