Twins in magnesium deformed at high strain rates for ~60 micro seconds.

1. Deformation Twinning at High Strain RatesMWNKaliat T. Ramesh, Johns Hopkins University, DMR 1008144 Among the structural metals, magnesium has one of the lowest densities. It has therefore become a material with great potential in a wide range of industries where low weight is important (for example, in the automobile industry, where the increased use of magnesium could lead to significant energy savings). Stronger Mg-based materials can thus have great impact on our way of life. One of the key mechanisms that affects the strength of magnesium is that of deformation twinning. We are experimentally determining the mobility of twin boundaries, so that we can build a model for deformation twinning that can guide the development of stronger magnesium-based materials. Twins in magnesium deformed at high strain rates for ~60 microseconds.

2. Deformation Twinning at High Strain RatesMWNKaliat T. Ramesh, Johns Hopkins University, DMR 1008144 This research program is part of the Materials World Network, and ties together research groups at Johns Hopkins and the National University of Singapore. We run periodic videoconferences that bring the two groups together to discuss the progress of our collaborative research. In addition, Prof. Ramesh spent 2 weeks in Singapore and Prof. Joshi of NUS spent a week at Hopkins. We currently have an undergraduate student (Chi Huan Nguyen) visiting us from NUS, and one of our students will be visiting NUS shortly. We have established strong international research exchanges with a strong educational component. Prof. Joshi & graduate student Ramin (both from NUS) together with Prof. Ramesh & Hopkins graduate students at the US National Congress at Penn State, 2010. Visiting NUS undergraduate student Chi Huan Nguyen with Hopkins graduate student GuangliHu in Baltimore, 2011