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The Evaluation of Residual Stresses in the Welded Joint of Steel Materials by the Optimum Selection of the Advanced Indentation Technique  

Yu, Seung-Jong (일진경금속(주) 소재기술연구소)
Kim, Joo-Hyun (국민대학교 기계자동차공학부)
Publication Information
Journal of the Korean Society for Precision Engineering / v.24, no.2, 2007 , pp. 118-126 More about this Journal
Abstract
Most of materials receive forces in use so that the characteristics of materials must be considered in system design to prevent deformation or destruction. Mechanical properties of materials can be expressed as responsible level of material itself under the exterior operation. Main mechanical properties are strength, hardness, ductility and stiffness. Currently, among major measure facilities to measure the mechanical properties, advanced indentation technique has important use in industrial areas due to nondestructive and easy applications for mechanical tensile properties and evaluation of residual stress of materials. This study is to find the optimum experimental condition about residual stress advanced indentation technique for accurate analysis of the welded joint of steel materials through indentation load-depth curve obtained from cruciform specimen experiment. Optimum selection was applied to the welded joint of real steel materials to find out non-equi-biaxial stress state and the results were compared with general residual stress analyzing method fur verification.
Keywords
advanced indentation technique; cruciform specimen; residual stress; welded joint; Optimum selection;
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