Accession Number : ADA256702


Title :   A Correlation of Welding Solidification Parameters to Weld Macrostructure


Descriptive Note : Master's thesis


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Novak, Francis G


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a256702.pdf


Report Date : 18 Jun 1992


Pagination or Media Count : 99


Abstract : A 3-D finite difference model simulating single pass autogenous welds was used to predict the temperature fields in HY-80 steel arc weldments at various powers and torch velocities. From the predicted temperature field, two important solidification parameters were calculated at the solid-liquid interface: temperature gradients and crystal growth velocities. These were correlated with the macrostructures observed in actual weldments. For purposes of model validation, the predicted and actual fusion zone sizes were in agreement, as were the predicted time temperature curves compared to those measured with thermocouples embedded in the plate.


Descriptors :   *TEMPERATURE GRADIENTS , *WELDING , VELOCITY , SIMULATION , TEMPERATURE , VALIDATION , MODELS , INTERFACES , PLATES , CRYSTAL GROWTH , THERMOCOUPLES , LIQUIDS , THESES , SOLIDIFICATION , SOLIDS , STEEL , WELDMENTS


Subject Categories : Fabrication Metallurgy
      Computer Programming and Software


Distribution Statement : APPROVED FOR PUBLIC RELEASE