Archive for January, 2014

Barr, Vetterick, Taheri, and colleagues publish in Acta Materialia

Posted in News on January 27th, 2014 by admin – Comments Off on Barr, Vetterick, Taheri, and colleagues publish in Acta Materialia

Christopher Barr, Greg Vetterick, Dr. Taheri, and colleagues’ latest paper, titled “Anisotropic radiation-induced segregation in 316L austenitic stainless steel with grain boundary character” has been published online in the Acta Materialia.

From the abstract: “Radiation-induced segregation (RIS) and subsequent depletion of chromium along grain boundaries has been shown to be an important factor in irradiation-assisted stress corrosion cracking in austenitic face-centered cubic (fcc)-based alloys used for nuclear energy systems. A full understanding of RIS requires examination of the effect of the grain boundary character on the segregation process. Understanding how specific grain boundary structures respond under irradiation would assist in developing or designing alloys that are more efficient at removing point defects, or reducing the overall rate of deleterious Cr segregation. This study shows that solute segregation is dependent not only on grain boundary misorientation, but also on the grain boundary plane, as highlighted by markedly different segregation behavior for the Σ3 incoherent and coherent grain boundaries. . .”

The accepted proof of the paper can be accessed here.

More information is available on the Springer website.

Scotto D’Antuono, Taheri, and colleagues publish in Scripta Materialia

Posted in News on January 13th, 2014 by admin – Comments Off on Scotto D’Antuono, Taheri, and colleagues publish in Scripta Materialia

Daniel Scotto D’Antuono, Dr. Taheri, and colleagues’ latest paper, titled “Grain Boundary Misorientation Dependence of β Phase Precipitation in an Al-Mg Alloy” has been published online in the Scripta Materialia.

From the abstract: “Precipitation of β phase (Al3Mg2) in an Al-Mg alloy is investigated by in situ heating and precession diffraction-based orientation imaging in a transmission electron microscope. Initial β formation occurs more readily at low angle grain boundaries rather than at high angle boundaries, however larger precipitates are found at high angle boundaries. We propose a mechanism for β formation based on boundary energy and grain boundary free volume. These results advance the understanding of Β phase formation, aiding future corrosion prevention.”

The accepted proof of the paper can be accessed here.

More information is available on the Elsevier website.