One of the primary focus of the group is to correlate microstructure with small scale mechanical properties of NiTi based shape memory alloys. SMAs with a large extent of strain recoverability, termed as pseudoelasticity is increasingly used for miniaturized devices as cardio-vascular stents, sensors, micro-actuators, MEMS etc. Orientation of the grains significantly affect and control the extent of pseudoelasticity. Small scale mechanical performances of such SMAs with a special emphasis on determining the best possible orientations that yield best pseudoelasticity are characterized by the group by implementing indentation.
Mechanical performance and especially fatigue behavior of metallic alloys used for biomedical applications are of serious concern. One of the primary focus of the group is to characterize the in-vitro tensile and fatigue performances of such alloys such as Steels, NiTi and Ti alloys. Biomedical implants including cardiovascular stents, orthodontic braces etc. are used in the form of wires. Such implants tend to withstand corrosive atmosphere inside the body along with substantial stresses and their fluctuations for prolonged periods. To characterize their performance, tensile and fatigue properties of wires are studied by the group by immersing the wires in body like atmosphere in simulated body fluids along with the application of fluctuating loads. Moreover, studies are also performed on alloys used for marine applications, for example Steels with the application of saline water along with monotonic and fluctuating loads.
High temperature alloys such as newly developed third generation TiAl based intermetallic alloys are increasingly used in aerospace applications owing to their outstanding high temperature strength. Performance of such alloys with the simultaneous application of higher temperatures and fluctuating loads are aimed to be investigated by the group. The objective is to characterize the high temperature mechanical performances of indigenously produced alloys which would be beneficial for aerospace and defense applications.
Fatigue in Ti-6Al-4V-B alloys by Indrani Sen, K. Gopinath, R. Datta and U. Ramamurty Acta Materialia 58 - (2010)
Elastic Modulus of Ti-6Al-4V-xB alloys with B up to 0.55 wt.% by Indrani Sen and U. Ramamurty Scripta Materialia 62 - (2010)
Microstructural effects on the mechanical behavior of B-modified Ti-6Al-4V alloys by Indrani Sen, S. Tamirisakandala, D.B. Miracle and U. Ramamurty Acta Materialia 55 - (2007)
Microstructure and mechanical behavior of a mini-thixoformed tool steel by Indrani Sen, Hana Jirková, Bohuslav Ma ek, Marcus Böhme and Martin F.-X. Wagner Metallurgical and Materials Transactions A 43 - (2012)
High temperature (1023 K to 1273 K [750 °C to 1000 °C]) plastic deformation behaviour of B-modified Ti-6Al-4V alloys by Indrani Sen and U. Ramamurty Metallurgical and Materials Transactions A 41 - (2010)
High temperature deformation processing maps for boron modified Ti-6Al-4V alloys by Indrani Sen, R.S. Kottada and U. Ramamurty Materials Science and Engineering A 527 - (2010)
Micromechanisms of damage in a hypereutectic Ti-6Al-4V-B alloy by Indrani Sen, L. Maheswari, S. Tamirisakandala, D.B. Miracle and U. Ramamurty Materials Science and Engineering A 518 - (2009)
Microstructures and mechanical properties of annealed SUS 304H austenitic stainless steel with copper by Indrani Sen, K. E. Amankwah, N. Santosh Kumar, E. Fleury, K. Oh-ishi, K. Hono, U. Ramamurty Materials Science and Engineering A 528 - (2011)
R.L. Narayan, K. Boopathy, Indrani Sen, D.C. Hofmann and U. Ramamurty by On the hardness and elastic modulus of BMG matrix composites Scripta Materialia 63 - (2010)
Mechanical behavior of steel wire in corrosive atmosphere and fatigue studies by Lakhindra Marandi and Indrani Sen Proceedings of 7th International Conference on Creep, Fatigue and Creep-Fatigue interaction - (2016)
Development of High Performance Materials for Various Defence Related Applications Directorate of extramural research & intellectual property rights (ER&IPR), DRDO
Area of Research: Mechanical behavior of Ti-based alloys
Sujith Kumar S
Area of Research: Deformation Characteristics of NiTi alloys
Sk Wasim Haidar
Area of Research: High temperature mechanical properties of materials
Area of Research: High temperature mechanical behavior of Ti alloys
Adya Charan Arohi
Area of Research: Fatigue of Titanium alloys
Area of Research: Design and development of high temperature high strength Aluminum alloys by nanostructural engineering