Based on the generality, these interpretations are discussed through the representative investigations on intermediate temperature embrittlement. The existing interpretations of the mechanism are then outlined. To clarify this situation, the present article first confirms the generality of intermediate temperature embrittlement of Ni and Ni-based alloys by the experimental results reported in the literature. A comparison of published papers by various authors reveals considerable differences in understanding the mechanism of intermediate temperature embrittlement. However, many experiments demonstrated that these alloys as well as Ni always show ductility loss at intermediate temperature, which constrains further development. Ni-based superalloys play an important role in aircraft engine propulsion. In parallel, hot tensile tests following fast heating were performed to determine the DDC temperature range, to try and correlate DDC to the thermomechanical behavior. This test clearly demonstrates the effect of multiple passes on the occurrence of DDC.
This test is based on multiple welding beads on a cuboidal mockup. To do this, we designed a simple hot crack susceptibility test. This work is undertaken to determine more precisely the thermomechanical conditions of the occurrence of DDC in two types of materials: filler metals 52M and 152. However 690 alloy, and the corresponding welding filler metals (types 52 and 152), can be sensitive to a solid state hot cracking phenomenon during welding, called “ductility dip cracking” (DDC) associated to grain boundary cracking. Labs supporting Ukrainian Scientists is an expansive list of labs and PIs offering support at this time.Inconel® alloy 690 is nowadays commonly used instead of 600 for the manufacturing of certain components of the primary circuit of pressurized water reactor (PWR) nuclear power plants, due to its superior resistance to corrosion and stress corrosion cracking.Science for Ukraine provides an overview of labs offering a place for researchers and students who are affected to work from, as well as offers of employment, funding, and accommodation:.Personally, I have found the messages of support from scientists everywhere to be truly heartfelt, and I would like to highlight some of the community initiatives I’ve seen here: We also want to use our platform to highlight the response from the scientific community.
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