Recrystallization Behavior of CoCrCuFeNi High-Entropy Alloy
- PDF / 3,343,033 Bytes
- 7 Pages / 593.972 x 792 pts Page_size
- 102 Downloads / 260 Views
N
IN metallurgy, it is general to design a new alloy by selecting one major element and considering small amounts of alloying elements to achieve certain properties. Such a traditional way has enlarged our understanding about various effects of small amounts of additional elements in metallic materials. In 2004, on the other hand, Cantor et al. designed new alloys that consisted of 5 to 20 elements with equiatomic percent where there was no longer major element unlike conventional alloys previously designed.[1] Many researchers have studied such multi-elements alloys composed of nearly equiatomic compositions, which NOKEUN PARK, JSPS Postdoctoral Fellow, is with the Department of Materials Science and Engineering, Kyoto University, Yoshida Honmachi, Sakyo-ku, Kyoto 606-8501, Japan, and also with the Department of Microstructure Physics and Alloy Design, MaxPlanck-Institute for Iron, Du¨sseldorf, Germany. IKUTO WATANABE, Graduate Student, is with the Department of Materials Science and Engineering, Kyoto University. DAISUKE TERADA, Associate Professor, is with the Department of Materials Science and Engineering, Kyoto University, and Department of Mechanical Science and Engineering, Chiba Institute of Technology, Tsudanuma, Narashino, Chiba 275-0016, Japan, and also with the Elements Strategy Initiative for Structural Materials (ESISM), Kyoto University, Yoshida Honmachi, Sakyo-ku, Kyoto 606-8501, Japan. YOSHIHIKO YOKOYAMA, Associate Professor, is with the Institute for Materials Research, Tohoku University, Sendai, Miyagi 980-8577, Japan. PETER K. LIAW, Professor, is with the Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996-2100. NOBUHIRO TSUJI, Professor, is with the Department of Materials Science and Engineering, Kyoto University, and also with the Elements Strategy Initiative for Structural Materials (ESISM), Kyoto University. Contact e-mail: [email protected] Manuscript submitted May 30, 2014. Article published online 8 October 2014 METALLURGICAL AND MATERIALS TRANSACTIONS A
often show single-phase solid solution and are named as high-entropy alloys (HEAs).[2–10] HEAs have attracted increasing attention because they often show superior mechanical properties, such as high strength, large strain-hardening capabilities, high fracture toughness, and so on.[5–9] By now, however, most studies on HEAs carried out at the laboratory scale have dealt with as-cast materials or those just after simple homogenization heat treatment. Similar to conventional metals and alloys, there is a great possibility of microstructural control through thermomechanical processing in HEAs for improving their properties. Because low diffusivity is expected in HEAs[3,10] fine and thermally stable grain structures are expected to be achieved. In this study, we have focused on clarifying deformation and recrystallization behaviors of an HEA. One critical issue in the field of HEAs is how to predict which phases exist in a given composition. There are no reliable phase diagrams for mu
Data Loading...
