By H. Cerjak
This 6th quantity within the Mathematical Modelling of Weld Phenomena sequence files the complaints of the 6th foreign Seminar at the Numerical research of Weldability, held in October 2001, Austria
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Additional info for B0784 Mathematical modelling of weld phenomena 6
As a result, in various cross sections of the same welded sample, the weld pool shapes characteristic of either conduction or keyhole mode were observed. -. -. 085 m S-l Fig. 8 Comparison of the experimentally obtained weld pool cross-sections at two welding speeds with the calculated results. 66 m" h-l of helium. Temperatures on the contour lines are in K. c ..... 2 .. 5 (IDID) Set 3 --Model Fig. 0 mm-thick aluminium alloy 5182 plates at several beam defocus values. 66 m'' h-1 of helium. It is observed in Fig.
A. SCHAUERand W. H. 57(7), pp. 189s-195s. 52. A. MATSUNAWA and V. SEMAK: Journal of Physics D: Applied Physics, 1997, 30 (5), pp. 798-809. 53. A. ROBERTand T. DEBRoy: Metallurgical and Materials Transactions, 2001, 32B. 54. R. L. KETTER,S. P. : Modern Methods of Engineering Computation, McGraw-Hill, 1969, p. 492. 55. P. KRUGER:Journal of Physical Chemistry in Solids, 1993, 54, p. 1549. 56. S. K. NATH, S. RAyand V. N. S. MATHUR:lSI] International, 1994,34, p. 191. 57. J. W. CHRISTIAN:The Theory of Transformations in Metals and Alloys, 2nd Edition, Part I, Pergamon, 1975.
3 that different ranges of dimensionless heat input and dimensionless area were obtained for different materials. Sodium nitrate (NaN03)' which has a very low thermal diffusivity,has high values of dimensionless heat input and dimensionless area. Aluminum, with its high thermal diffusivity, takes up the lower range of dimensionless heat input and dimensionless area and the other materials fall between NaN03 and aluminum. Using the correlation in equation (6), the weld pool cross sectional area can be predicted for low speed and spot welds without using any heat transfer and fluid flow model.