ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
The paper presents original methodology for assessment of heterogeneity of welded jointby measurement of concentration profiles of substitution elements in three straight lines in a planeperpendicular to the weld interface. The weld joint is formed by low-alloyed CrNiMoV steel andlow-alloy silicon steel. Three concentration profiles are evaluated by modeling of diffusion based onsolution of the 2nd Fick’s law. Primary goal of evaluation consists in assessment of chemicalheterogeneity in the narrow area on both sides of the weld joint on the basis of their mutual position.Experimental data are optimized by original adaptation of the Levenberg–Marquardt’s algorithm ofnon-linear regression. Modeling comprises also determination of diffusivities and graphicalrepresentation of their temperature dependencies. The paper deals with diffusion of silicon as anexample of many other investigated elements
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.138.193.pdf