Influence of Heat Treatments on the Impact Strength for Welded Constructions


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Abstract


The welded joints are the seat of high residual stresses, localized in the vicinity of the cracks of the weld cord. Their presence has a major part with respect to certain damaging modes such as stress corrosion, tiredness, the brutal rupture and the increase in the temperature of ductile-brittle transition. The welding operation can be comparable, from the point of view of the heating effect, with a process of nonuniform heating. Where cooling, at room temperature, the welding cord and the close zones towards the base metal are partially obstructed by the little overheated zone during welding. Tensile residual stresses will then occur in the cord and in adjacent zones.  These stresses which are balanced by residual stresses of compression will be developped in the zones further away from the cord. Welding is generally followed by a heat treatment after in order to reduct the residual stresses and secondly to obtain the desired nuance of the molten zone and the thermically affected zone. The discussion is based on observations and analyzes of the phenomenon resulting from the various tests carried out under various conditions by using recent techniques
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Keywords


Welding; Heat Treatments; Residual Stresses; Brittle Fracture; Impact Strength

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References


H. GRANJON, Metallurgical bases of welding, publications of welding and its applications (1995).

NR. CAVALLO, Contribution to the experimental validation of models describing the ZAT at the time of an operation of welding, thesis of doctorate, INSA, April, 1998.

C. LEYMONIE, R. BOUVEROT. Contribution to the study of the heat treatments after welding of steels slightly allied, Welding and techniques related N°1/2, 1970, pp. 38– 46.

L. Primot and J. Attimont, Of the heat treatment after welding, Technical Note, CETIM, 1990, N° 118, pp. 16– 29.

BENOIT Tanguy, modeling of the Charpy test by the local approach of the rupture, application to the case of steel 16MND5 in the field of transition, 2001.

Quentin AUZOUX, cracking in relieving of the austenitic stainless steels influences work hardening on intergranular damage, thesis of doctorate, ENSM of Paris, 2004.

LAMBERD, P. Astrid, Rupture by cleavage of microstructure of bainitic steels obtained in conditions of welding, thesis of doctorate, ENS of the Mines of Paris, May 2001.

P. HAUSILD. Ductile-brittle transition in a low alloy steel, thesis of doctorate, central School of bets, September 2002.


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