naa a22 4500 510770754 CHVBK 20180411083212.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s11837-013-0753-6 doi (NATIONALLICENCE)springer-10.1007/s11837-013-0753-6 Effect of Aluminum Content on Microstructure and Mechanical Properties of Al x CoCrFeMo0.5Ni High-Entropy Alloys [Elektronische Daten] [Chin-You Hsu, Chien-Chang Juan, Tsing-Shien Sheu, Swe-Kai Chen, Jien-Wei Yeh] High-entropy alloys Al x CoCrFeMo0.5Ni with varied Al contents (x=0, 0.5, 1.0, 1.5, and 2.0) have been designed based on the Al x CoCrCuFeNi system to improve mechanical properties for room and elevated temperatures. They have been investigated for microstructure and mechanical properties. As the aluminum content increases, the as-cast structure evolves from face-centered cubic dendrite+minor σ-phase interdendrite at x=0 to B2 dendrite with body-centered cubic (bcc)precipitates +bcc interdendrite with B2 precipitates at x=2.0. This confirms the strong bcc-forming tendency of Al. The room-temperature Vickers hardness starts from the lowest, HV 220, at x=0, attains to the maximum, HV 720, at x=1.0, and then decreases to HV 615 at x=2.0. Compared with the base alloy system, the current alloy system has a superior combination of hardness and fracture toughness. In addition, Al x CoCrFeMo0.5Ni alloys except x=0 display a higher hot hardness level than those of Ni-based superalloys, including In 718 and In 718 H, up to 1273K and show great potential in high-temperature applications. The Minerals, Metals & Materials Society, 2013 Hsu Chin-You Department of Materials Science and Engineering, National Tsing Hua University, 300, Hsinchu, Taiwan aut Juan Chien-Chang Department of Materials Science and Engineering, National Tsing Hua University, 300, Hsinchu, Taiwan aut Sheu Tsing-Shien Department of Air Transportation, Kainan University, 338, Luzhu, Taoyuan, Taiwan aut Chen Swe-Kai Center for Nanotechnology, Materials Science, and Microsystems, National Tsing Hua University, 300, Hsinchu, Taiwan aut Yeh Jien-Wei Department of Materials Science and Engineering, National Tsing Hua University, 300, Hsinchu, Taiwan aut JOM Springer US; http://www.springer-ny.com 65/12(2013-12-01), 1840-1847 1047-4838 65:12<1840 2013 65 11837 https://doi.org/10.1007/s11837-013-0753-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11837-013-0753-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hsu Chin-You Department of Materials Science and Engineering, National Tsing Hua University, 300, Hsinchu, Taiwan aut NATIONALLICENCE 700 1- Juan Chien-Chang Department of Materials Science and Engineering, National Tsing Hua University, 300, Hsinchu, Taiwan aut NATIONALLICENCE 700 1- Sheu Tsing-Shien Department of Air Transportation, Kainan University, 338, Luzhu, Taoyuan, Taiwan aut NATIONALLICENCE 700 1- Chen Swe-Kai Center for Nanotechnology, Materials Science, and Microsystems, National Tsing Hua University, 300, Hsinchu, Taiwan aut NATIONALLICENCE 700 1- Yeh Jien-Wei Department of Materials Science and Engineering, National Tsing Hua University, 300, Hsinchu, Taiwan aut NATIONALLICENCE 773 0- JOM Springer US; http://www.springer-ny.com 65/12(2013-12-01), 1840-1847 1047-4838 65:12<1840 2013 65 11837 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer