Columnar to equiaxed transition in solidification processing
By W. Kurz, C. Bezençon, M. Gäumann. 2001
431 citations recorded by the source corpus.
Abstract The columnar to equiaxed transition (CET) is a microstructural transition that has to be controlled during certain solidification processes. CET models and microstructure selection maps, based on nucleation and dendritic growth models, are briefly described. Processing maps can be established by combining a CET model with numerical calculations of local solidification conditions. Such processing maps are helpful for the control of the solidification microstructure. As examples, two processes are discussed: the epitaxial laser metal forming (E-LMF) process where a single crystalline superalloy part is repaired in single crystal form and equiaxed grains have to be avoided; and the arc welding of aluminium alloys where equiaxed grains are the preferred solidification structure.
Subfields: Aerospace Engineering, Materials Chemistry, Mechanics of Materials
View Paper: https://www.semanticscholar.org/paper/ccb2d5bda96cee720531882ae42f053e53df379b
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Citations in the corpus
- A comparative study of additive manufacturing techniques: Residual stress and microstructural analysis of CLAD and WAAM printed Ti–6Al–4V components (2016, neutral): “Indeed, with the local decrease of liquid fraction the ratio G/V (where G is the thermal Gradient and V the growth velocity) tends to decrease which drives the solidification path towards the equiaxed growth domain [23].”
- Progress in modelling solidification microstructures in metals and alloys. Part II: dendrites from 2001 to 2018 (2020, methodology): “This model was adapted with a more realistic dendrite growth model, thus changing the limits for this transition [229,230].”