The Charpy Impact Transition Temperature for some Ferritic Steel Welds

S. H. Lalam, H. K. D. H. Bhadeshia and D. J. C. MacKay

Abstract

Body-centered cubic iron undergoes a ductile-brittle fracture transition as a function of temperature. A common way of describing the Charpy toughness is to measure the temperature T_27J corresponding to a particular value of absorbed energy. Extensive data on variations in T_27J as a function of the microstructure and weld metal composition have recently been published along with a linear regression analysis. In the present work we show that it is possible to infer more meaning from the data by using a neural network (non-linear regression) analysis. The software associated with this work is available on the world-wide-web.

Australasian Welding Journal, Vol. 45, 2000, pp. 33-37.

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	Science and Technology of Welding and Joining A journal founded and edited by S. A. David, T. Debroy and H.K.D.H. Bhadeshia Published by The Institute of Materials, London, since 1996
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