Designing resettable metallic materials through multi-field mapping

May 15, 2017

MMEC SEMINAR SERIES

Mechanics: Modeling, Experimentation, Computation
Tuesday, May 16th, 2017, 4 pm, Room 3-370
Designing resettable metallic materials through multi-field mapping
Professor C. Cem Tasan
Department of Materials Science and Engineering, Massachusetts Institute of Technology

Metals are poor at self-repair due to the ambient temperature sluggishness of transformations compared to, for example, polymers. On the other hand, they respond well to external repair treatments aimed at macroscopic discontinuities (see, for example, repair of bridge steel cracks, worn turbine blades, forging of casting defects, etc.). This forgiving nature of metals, however, has not been utilized to focus on early stages of microscopic damage nucleation, where preventive healing becomes a more feasible option. The challenge thereof arises due to the complexity of plasticity & damage micro-mechanics, and phase transformation kinetics in multi-phase microstructures. In the Tasan Group, by developing multi-field mapping tools and methods, we improve our understanding of these microstructural processes, and by utilizing this understanding, we design resettable-alloys: alloys where each microstructural constituent has the capability to revert back to its exact pre-deformation state, with feasible resetting treatments. This design-for-reuse approach thus sets the foundations for the introduction of metals that can be used continuously.

Seminar Host: Pedro Reis (preis@mit.edu)  

Please join us for refreshments beforehand, outside Room 3-370

For more information, visit our website at http://web.mit.edu/mmec/

Series Organizers: Ken Kamrin (kkamrin@mit.edu); Pedro Reis (preis@mit.edu); Themis Sapsis (sapsis@mit.edu); Xuanhe Zhao (zhaox@mit.edu) and Ming Guo (guom@mit.edu)

Coordinator: Christina Spinelli (x3-5328, cspinell@mit.edu)

 

Abstract References

Bone-like crack resistance in hierarchical metastable nanolaminate steels, M. Koyama, Z. Zhao, M. Wang, D. Ponge, D. Raabe, K. Tsuzaki, H. Noguchi, C.C. Tasan, Science 355 (2017) 1055-1057.

Complexion-mediated martensitic phase transformation in Titanium, J. Zhang, C.C. Tasan, M.J. Lai, A- C. Dippel, D. Raabe, Nature Communications, 8 (2017) 14210.

Metastable high entropy dual phase alloys overcome the strength-ductility trade-off, Z. Li, K.G. Pradeep, Y. Deng, D. Raabe, C.C. Tasan, Nature, 534 (2016) 227-230.

Self-Healing metals, B. Grabowski and C.C. Tasan, Advances in Polymer Science (1-21). Berlin, Heidelberg: Springer (2016).

Multi-probe microstructure tracking during heat treatment without an in-situ setup: Case studies on martensitic steel, dual phase steel and β-Ti alloy J.-L. Zhang, L. Morsdorf, C.C. Tasan, Materials Characterization, 111 (2016) 137-146.

High resolution in-situ mapping of microstrain and microstructure evolution reveals damage resistance criteria in dual phase steels, D. Yan, C.C. Tasan, D. Raabe, Acta Materialia, 96 (2015) 399-409.

Integrated experimental-simulation analysis of stress and strain partitioning in multi-phase alloys, C.C. Tasan, M. Diehl, D. Yan, C. Zambaldi, P. Shantraj, F. Roters, D. Raabe, Acta Materialia, 81 (2014) 386-400. 

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