By W. Sudnik
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Extra info for Arc Welding
Roughly, it can be seen the larger thermal affection in the single V groove joint as compared to the IEA and MIEA welds. 3. Applications of the IEA welding process In this section, an overview of the findings and benefits observed in different materials are provided. Between these materials are the MMCs, aluminium and its alloys and carbon steels. 1 Composites The development of MMCs was a breakthrough in materials technology in the 80´s. Acceptation and use of new materials rely on their readiness to be joined.
Fig. , 2008). Fig. 16b, shows the FCG for base metal in both directions. This graph shows that the microstructure aspect (anisotropy) does not have an important influence in terms of FCG as could be expected, taking into consideration that yield strength in the base metal parallel to rolling direction is higher than transverse direction. However this is not the case for the weld metal and HAZ (Figs. 16c-d), in which the crack tend to propagate faster than base metal. Under this scenario, the FCG behavior for base metal (L-T) was taken as a basis to perform a comparative table between the weld metal and HAZ of MIEA and FSW.
5% acetic acid, saturated with hydrogen sulphide (H2S)) at a strain rate of 1x10-6 s-1 at room temperature (25°C) and at 37°C and 50°C. All of the tests were performed at the open circuit potential (OCP). The loss in ductility was assessed in terms of the percentage reduction in cross-sectional area (% RA), as follows %RA A1 A f Af x 100 (2) where Ai and Af are the initial and final cross-sectional areas, respectively. The index of susceptibility to SSC (ISSC) was calculated as follows I SSC %RAAIR %RANACE %RAAIR (3) where % RAAIR and % RANACE are the percentage reduction in area values in air and in the H2S-saturated NACE solution, respectively.
Arc Welding by W. Sudnik