• Aucun résultat trouvé

Characterization of a welded joint in steelAPI.5L.X70 having undergone successive repairs

N/A
N/A
Protected

Academic year: 2021

Partager "Characterization of a welded joint in steelAPI.5L.X70 having undergone successive repairs"

Copied!
1
0
0

Texte intégral

(1)

Materials science engineering MSE 2012

Characterization of a welded joint in steel

API.5L.X70 having undergone successive repairs

B. MAAMACHE, M.BOUABDALLAH, H.BRAHIMI, Y. YAHMI, M.

NOUREDDINE

Abstract : The object of this paper is to study the effect of the successive repairs on the weldment quality, knowing that these repairs constitute a main problem in the hydrocarbons transportation industry. We study the effect of several thermal cycles welding on the microstructural welding joints evolution, particularly the heat affected zones and its extend. We weld and repair many times a steel sample used in the hydrocarbons transportation. The metallographic analysis and mechanical tests results show the harmful effect of repairs that cause a prejudice on the life of weldment

Keywords : welding, Repair, Thermal cycle, Heat affected zone

Centre de Recherche en Technologies Industrielles - CRTI - www.crti.dz

Powered by TCPDF (www.tcpdf.org)

Références

Documents relatifs

The unitary maps ϕ 12 will be very useful in the study of the diagonal action of U(2) on triples of Lagrangian subspaces of C 2 (see section 3).. 2.4

- The higher the welding energy, the larger the extent of HAZ; so, repairs have a small influence on the width of the HAZ, when the factors that affect the grain

The results show that the succession of repairs in the same area has a direct influence on the microstructure morphology for all the welded joints samples when the mechanical

Four conditions of shielded metal arcwelding repairs and one aswelded specimen of the girth weld were characterized to determine changes in the microstructure, grain size

Abstract : The effect of successive repairs on the weldment quality of API 5L X-70 pipeline steel H.S.L.A. Keywords : welding, Heat affected zone, Thermal cycles,

The obtained values of the tensile strength of the various welded pipes are acceptable by the standards which imply the qualification of the welding process for all the

As we have seen in this section, due to the exponential problem of computing concrete repairs, our approach explores all combinations of values and tests whether they fix

We show that, under certain restrictions on this relation (well-founded, one-step gen- erated, effectively finitely branching), maximally strong weakenings w.r.t4. it can effectively