I have 20 years of experience, and specialize in the field of materials science and engineering with specific knowledge in the areas of metallurgy, electron microscopy and mechanical property evaluation. I have published on such topics as crack propagation by fatigue in Nb-Si alloy, fracture behavior of dual phase sheet steel and deformation of magnesium and aluminum alloys. I have testified 10 times on topics such as fatigue failure of wires, microstructure of welded zone of aluminum and magnesium alloys, and fracture of metallic glasses.