Environmental Degradation of Multiple Principal Component Materials: Poster Session
Sponsored by: TMS Structural Materials Division, TMS: Corrosion and Environmental Effects Committee, TMS: Nuclear Materials Committee
Program Organizers: Wenjun Cai, Virginia Polytechnic Institute and State University; ShinYoung Kang, Lawrence Livermore National Laboratory; XiaoXiang Yu, Novelis Global Research Center; Vilupanur Ravi, California State Polytechnic University Pomona; Christopher Weinberger, Colorado State University; Elizabeth Opila, University of Virginia; Bai Cui, University of Nebraska-Lincoln; Mark Weaver, University of Alabama; Bronislava Gorr, Karlsruhe Institute of Technology (KIT); Srujan Rokkam, Advanced Cooling Technologies, Inc.

Monday 5:30 PM
February 28, 2022
Room: Exhibit Hall C
Location: Anaheim Convention Center

B-1: Evaluating the Influences of Microstructural Attributes on the High Temperature Oxidation of a AlCoCrFeNi High Entropy Alloy: Michael Pavel1; Mark Weaver1; 1Univ of Alabama Tuscaloosa
    The oxidation behavior of an equiatomic AlCoCrFeNi high-entropy alloy (HEA) has been studied at 1050C to assess the influence of chemical ordering and ordered phase content on the alloy’s oxidation behavior. Annealing times of 120 and 1000 hours were investigated. TGA studies revealed a 40% decrease in specific mass gain following the 1000 h anneal. The results suggest that this decrease is caused by a reduction in the concentration of vacancies and anti-site defects after annealing, which favors reduced aluminum diffusivity and oxygen penetration, along with increasing alumina growth. The results of these oxidation studies are discussed relative to traditional oxidation theory.