Journal
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
Volume 149, Issue -, Pages 55-65Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijpvp.2016.12.004
Keywords
6061 Aluminium Alloy; Thermomechanical properties; Electron beam welding; Stress-strain curves; Yield strength; Finite element modeling
Funding
- CNRS through FEDERAMS [FR2145]
- AREVA
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Thermal loadings representative of a welding cycle at a point in the Heat Affected Zone (HAZ) of an Electron Beam Welding (EBW) have been reproduced experimentally. It means that the temperature is continuously varying, first increasing (during heating) and then decreasing (during cooling) without dwell-time at the highest temperature. Tensile tests have been carried out either during heating or during cooling of the specimen. The mechanical properties of two idealized phases - T6 temper and 0 temper- have been estimated as a function of temperature. To validate the accuracy of this thermo-mechanical database, a comparison between measured and calculated stress-strain curve is then presented which shows that this approach may be useful to predict the tensile behaviour of this alloy at high temperature whatever the experienced temperature history representative of EBW. Finally, a comparison between numerical and experimental residual stresses is presented for a beam girth weld application. (C) 2016 Elsevier Ltd. All rights reserved.
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