A Quest for a New Hot Tearing Criterion
By D. Eskin, L. Katgerman. 2007
258 citations recorded by the source corpus.
Hot tearing remains a major problem of casting technology despite decades-long efforts to develop working hot tearing criteria and to implement those into casting process computer simulation. Existing models allow one to calculate the stress-strain and temperature situation in a casting (ingot, billet) and to compare those with the chosen hot tearing criterion. In most successful cases, the simulation shows the relative probability of hot tearing and the sensitivity of this probability to such process parameters as casting speed, casting dimensions, and casting recipe. None of the existing criteria, however, can give the answer on whether the hot crack will appear or not and what will be the extent of hot cracking (position, length, shape). This article outlines the requirements for a modern hot tearing model and a criterion based on this model as well as the future development of hot tearing research in terms of mechanisms of hot crack nucleation and propagation. It is suggested that the new model and criterion should take into account different mechanisms of hot tearing that are operational at different stages of solidification and be based on fracture mechanics, i.e., include the mechanisms of nucleation and propagation of a crack.
Subfields: Aerospace Engineering, Mechanical Engineering, Mechanics of Materials
View Paper: https://www.semanticscholar.org/paper/79195b894bf2752d342760c89d79211d4574f663
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In Aerospace Engineering
In Mechanical Engineering
In Mechanics of Materials
Citations in the corpus
- Recent advances in hot tearing during casting of aluminium alloys (2020, background): “The criteria of Feurer, Clyne and Davies, and Katgerman were based on the consideration that hot tearing does not occur under sufficient feeding during solidification.”