An analytical dislocation multiple-pile-up model was proposed in order to relate the yield stress of lamellar materials to the lamellar thickness and grain size. A simple analytical formula was derived which gave a good correlation with experimental results for relatively thick lamellae.

An Analytical Dislocation Multiple Pile-Up Model for the Yield Stress of Fully Lamellar TiAl Alloys. J.Yang, G.Hu, Y.Zhang, J.Su: Modelling and Simulation in Materials Science and Technology, 2003, 11[4], 627-34