5. ConclusionsOur study is concerned with the possibility to use melt spinning or casting onto copper substrate techniques to simulate1002 D. Baldissin et al. / Materials Science and Engineering A 449–451 (2007) 999–1002industrial processes for 304 stainless steel where high undercoolings are required. Melt spinning seems to be more suited toreproduce microstructures obtained with strip casting [12] whilecasting into copper mould well reproduces morphologies typicalfor weldings. Both calculations based upon a multicomponentmodel of the phase selection and the microstructures found con-firm that there is no → transition for the composition ofthe steel considered as a function of undercooling in dendriticgrowth. High undercoolings typical of melt spinning techniquelead to the formation of primary austenite directly from the liquid. The dendritic growth model is not valid at these high growthrate where the planar front becomes again stable.