High Cr-Ni Superalloys Welded Joints Microstructure Evolution Submitted to Heat-Treatment




Introduction: It is well known that petrochemical and energy industries require high performance structural alloys in terms of mechanical strength, high-temperature stability and corrosion resistance in order to minimize or prevent premature degradation or failure under environmental and aggressive working conditions. In this industry sector, welding operations are very often required, mainly for the assembly and maintenance of equipment for fuels transportation. However, the properties and performance of structural materials welded joints can be significantly affected due to microstructural degradation, namely by heterogeneous precipitation resulting from high-temperature exposure of the joint [1]. In this sense, the aim of this work is to study the microstructural evolution of a high Cr-Ni superalloy 33 welded joints in the as-welded and post heat-treatment conditions.

Authors: J.C. Spadotto and I.G Solórzano

Keywords: Discontinuous Precipitation, Welded Metal Zone

Additional information

Page Count

3 pages


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