A mathematical programming technique developed recently that optimizes multiple correlated characteristics is the Multivariate Mean Square Error (MMSE). The MMSE approach has obtained noteworthy results, by avoiding the production of inappropriate optimal points that can occur when a method fails to take into account a correlation structure. Where the MMSE approach is deficient, however, is in ...

A group of stainless steel arc welding processes was compared for emission rates of fume and hexavalent chromium, and costs per meter length of weld. The objective was to identify those with minimal emissions and also compare relative labor and consumables costs. The selection included flux-cored arc welding (FCAW), shielded-metal arc welding (SMAW), and multiple gas metal arc welding (GMAW) pr...

Flux-cored wires are commonly used in structural and pipeline welding, shipbuilding, offshore constructions, petrochemical power generation industries. The higher heat inputs the multi-pass welding result shorter production time while considerably changing properties of welded joint. In this study, robotic flux cored arc with varying (between 0.56-2.52 kJ/mm) was performed to determine effect i...

This paper presents the results of a project aimed at evaluating performance ultrasonic techniques for detecting flaws in Francis turbine runners. work is first phase more ambitious program improving reliability inspection critical areas runners may be utilized to supply power during peak periods, which means that they experience additional load stress associated with start and stop sequences. ...