This paper investigates the effects of process parameters on weld bead width of austenitic stainless steel SS-310 in tungsten inert gas welding. The four parameters namely welding current, type of gas, gas flow rate and included angle of weld plates during butt joint were varied at three levels. The DOE approach was used to design experimental conditions. Orthogonal array L9 was used for carryi...

In this study, we developed an algorithm for detecting seam cracks in a steel plate. Seam cracks are generated in the edge region of a steel plate. We used the Gabor filter and an adaptive double threshold method to detect them. To reduce the number of pseudo defects, features based on the shape of seam cracks were used. To evaluate the performance of the proposed algorithm, we tested 989 image...

Model-based non-destructive evaluation proceeds measuring the response after an excitation on an accessible area of the structure. The basis for processing this information has been established in recent years as an iterative scheme that minimizes the discrepancy between this experimental measurement and sequence of measurement trials predicted by a numerical model. The unknown damage that mini...

SUS440 is a high-carbon stainless steel, and its martensite matrix has high heat resistance, high corrosion resistance, and high pressure resistance. It has been widely used in mechanical parts and critical materials. However, the SUS440 martempered matrix has reliability problems in thin plate applications and thus research uses different austempering heat treatments (tempering temperature: 20...

Bipolar plate is one of the key components of proton exchange membrane fuel cells (PEMFC). Since the production costs of traditional graphite bipolar plates are very expensive and need a few millimeters thickness over the space, the resulting metal bipolar plate not only reduces the cost of such a bipolar plate, the thickness can also be reduced to micron range. This study aims to explore the a...

The cutting pattern problem of the surplus steel plates (SPCP problem) is difficult to solve. In this paper, a divide-conquer heuristic search approach (DHSA) is proposed for SPCP. Firstly, the related knowledge is extracted and used in transforming the SPCP problem into the special restricted rectangle packing problem (S2RP problem) for each group of surplus(es) and orders. Afterward, feasible...

This paper is concerned with elastic local buckling of rectangular plates subjected to intermediate and end inplane loads. Since closed form solution for buckling analysis of plates with different end conditions and subjected to intermediate loads is complicated, numerical methods are more useful. Because of restrictions on the two finite strip methods, the longitudinal B3 spline expressions co...

Microalloyed S355N steel plates are extensively used in bridge and high-rise building structures. One of the factors affecting the mechanical properties is the size and morphology of inclusions. In this research, microalloyed S355N steel plates with different sizes of inclusions were examined. One contained long manganese sulfide inclusions (LI material) and the other had short ones (SI materia...

The goal of this study is investigating reduction of residual stresses from welding carbon steel plates through vibrationstress reliefmethod vs. thermal method. In order to carry out the required experimental tests, carbon steel plates were welded together under specific conditions as samples. Some of the samples were vibration stress relieved, some were thermal stress relieved while the rest r...

The performances of the synchronous reluctance motor are essentially dependent on the magnetic dissymetry of the machine, respectively of its rotor, as in [1], [2], [3], [4], [5], [6]. The last one is made from grain-oriented steel laminations, alternating with insulation and non-magnetic material. The fastening is realized with clamping plates and screws made from non-magnetic material (brass ...