Abstract
An experimental strategy was developed to obtain Si-Ti-Ni transparent sols via the sol-gel process. The sol was prepared from Si(OEt)4, Ti(OBu)4 and Nickel(II) acetylacetonate. The chelating agent (2,4 pentanedione, acacH) was employed to stabilize Ti precursor in order to control their chemical reactivity, avoiding precipitation.
Highlights
A days, the objective of the manufacturing industries is to achieve the economical welding condition
Micro structural and mechanical details of the heat affected zone of the real welded joint realized by Tungsten Inert Gas (TIG) welding process were compared to the simulated heat affected zone by the thermal cycle simulation in specific equipment
In our previous contribution to the understanding of the different microstructures in welded joints of Inc 738 LC super alloy using the thermal cycle simulation [9], we found that the obtained microstructures by thermal cycle simulation of welding correspond to those observed in the same zone of the real welded joint realized by TIG welding
Summary
The objective of the manufacturing industries is to achieve the economical welding condition. The mechanical properties of the welded metal and the HAZ are closely related to their microstructures, which are dependent on the chemical composition of the material and the thermal history (cycles) due to the welding processes [3,4]. The effect of HAZ has on the strength of the welded materials can be crucial, because HAZ is often the cause of future damage of many devices in which welding technology was used for their repair [5] For these reasons, it is necessary to investigate this narrow zone in welded metal. We studied the effect of heat treatment obtained by a thermal cycle simulation on AA2014 alloys microstructure, and we compared our observations to the real welded joint by TIG welding process
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