Issues in thermal contact and phase change in porosity prediction
Article Abstract:
The thermal contact and latent heat evolution involved in solidification modeling are studied for the identification of important criteria functions. These criteria functions are very important for determining the porosity level of thematerial being modeled. Experimental and computational analyses are carried outon a horizontally cast bar to investigate how its criteria functions are distributed. Results indicate that the treatment of thermal contact and phase change in solidification affects the values of the criteria functions.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1993
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Flow effects on the solidification environment in a GTA spot weld
Article Abstract:
The solidification structure of a gas-tungsten arc spot weld is studied through numerical simulations. An algorithm is used to simulate the macrograph of the spot weld. The melting phase involved in the welding process is also investigated with respect to the thermal gradient and solidification rate. Results reveal that the solidification phase is characterized by a flow dominated process of boundary smoothing and superheat reduction.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1993
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A new perspective on the influence of thickness and post-weld heat treatment for large scale welded joints
Article Abstract:
The influence of post-weld heat treatment (PWHT) on the fracture behavior of the weldments of welded constructional steel was investigated using data from nine companies. Results show that PWHT has beneficial effects on the fracture toughness of the weldments at all thicknesses. However, weldments with thicknesses of more than 100 mm were observed to react differently to PWHT.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1995
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