Computer model for prediction of heat-affectedzone microstructures in multipass weldments
Authors: Alberry, P. J.; Jones, W. K. C.
Source: Metals Technology, Volume 9, 1982 , pp. 419-426(8)
Publisher: Maney Publishing
Abstract:The basis for a computer model for heat-affected zones (HAZs) in multipass weldments is described in terms of: (i) classical heat flow to define the weld thermal cycle appropriate to the welding conditions and component geometry; (ii) basic metallurgy which includes phase transformations, grain growth, and precipitate dissolution kinetics; and (iii) semi-empirical correlations to describe the effects of welding variables on the weld-bead dimensions. A computer program has been developed to simulate the fabrication of thick-section weldments. Basic welding-process information and material-property data are accepted and the spatial distribution of an HAZ structure is produced as a graphic display. This technique can be used to examine the effects of welding variables on an HAZ structure so that optimum conditions can be established for a given welding situation. A two-layer refinement technique for 0·5Cr-Mo-V weldments is used as an example.
Document Type: Research Article
Publication date: 1982-01-01
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