Tribute to Professor D. S. Lieberman: On the importance of being invariant

Best known as co-author of the historic 1953 Invariant-Plane Strain (IPS) theory of martensite, Professor David S. Lieberman pioneered the crystal kinematic foundation of the theory of martensitic transformations. An early proponent of the practical potential of thermoelastic alloys, his interdisciplinary studies of a broad range of martensitic systems established mechanistic principles of point defect interactions underlying important mechanical behaviors, while his creative interests spanned diverse areas including materials sustainability and technical education reform. His special mix of strong will and singular humor played a unique role in shaping the martensite tradition.