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Computational and experimental investigations of Mg alloys

Computational and experimental investigations of Mg alloys. Zi-Kui Liu, The P ennsylvania State University, DMR 0510180.

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Computational and experimental investigations of Mg alloys

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  1. Computational and experimental investigations of Mg alloys Zi-Kui Liu, The Pennsylvania State University, DMR 0510180 The reduction of vehicle weight through material innovations is of growing importance to improve vehicle fuel economy and reduce emissions. This initiative is an especially high priority in light of rising oil prices and also global climate change due to greenhouse gases. With a density that is two-thirds aluminum and one-quarter steel, magnesium (Mg) alloys hold great promise as future vehicle structural materials. Herein, Cerium (Ce) serves a crucial role in the development of Mg alloys. As part of mish metals (e.g., 51.7% Ce, 23.1% La, 18.6%, Nd, and 6.5% Pr, in mass %), Ce is often added to improve Mg alloy formability and enhance corrosion resistance. Here, we present the study of Ce - isostructural phase transition by using the proposed first-principles thermodynamic framework for magnetic materials that exhibit itinerant-electron magnetism [see physics in right figures and J. Phys.: Condens. Matter 21 (2009) 326003]. Itinerant-electron magnetism model (top) and the free-energy evolution (bottom).

  2. Computational and experimental investigations of Mg alloys Zi-Kui Liu, The Pennsylvania State University, DMR-0510180 • Education and Outreach • Mentoring undergraduate (four females), graduate students (three females) and postdoctoral fellows (see the photo right), with two female undergraduate students, Laura Jean Lucca (Junior) and Laura Shell (Sophomore) from the WISER program (Women in Science and Engineering Research), and three REU students (Research Experience for Undergraduates) Yang Ling (female), Kacie Stewart (female, not in the photo), and Brad Hasek. • Teaching four talented, under-represented high school students in the SEEMS program (Summer Experience in Earth and Mineral Science) at Penn State in cooperation with the Upward Bound Math and Science Center at Penn State (see the photo right and below). These students were mentored by graduate student, SungHoon Lee, and they won the first place this year. Current members in Dr. Liu’s group. Our team H of SEEMS group won the first place for the year 2009.

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