Add to Calendar
A far from average talk: Distributions and the non-steady state in predicting alloy response
Materials Science and Engineering has been very successful in codifying the relationship between “structure” and “properties”. The Hall-Petch Law and Taylor equation are illustrative examples core to our understanding of crystalline plasticity. These expressions, like many others in our field, correlate an “average” structure (average grain size, average dislocation density) to a property (the macroscopic flow stress). The fact that these, along with many other descriptions of structure-property relationships in physical metallurgy, succeed to correlate “averaged” properties of statistically distributed structures is remarkable considering that in many cases (e.g. plasticity) there should be no expectation that the “average” should dominate. In this talk I will review some of our group’s work (experiments, numerical simulations and modelling) with the aim of including structural inhomogeneity and transient behaviour in structure-property relationships for crystal plasticity. In particular, the role that solute atoms may play in structure-property relationships is considered. Thoughts on how such temporally and spatially heterogeneous materials might aid in alloy design will be discussed.