naa a22 4500 510772536 CHVBK 20180411083219.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1007/s11837-013-0734-9 doi (NATIONALLICENCE)springer-10.1007/s11837-013-0734-9 Microstructure Investigation of Directionally Solidified NiAl-Cr(Mo)- x Dy ( x =0, 0.1wt.%) Hypereutectic Alloys at Different Withdrawal Rates [Elektronische Daten] [Lei Wang, Jun Shen, Zhao Shang, Jian-Fei Zhang, Yu-Jun Du, Heng-Zhi Fu] The microstructures of directionally solidified Ni-31Al-32Cr-6Mo (at.%)-xDy (x=0, 0.1wt.%) hypereutectic alloys were studied at different withdrawal rates. The results show that the microstructure changes from the planar eutectic to the cellular eutectic and the volume fraction of the primary Cr(Mo) dendrites decreases for the Dy-free alloy with the withdrawal rate varying from 6μm/s to 30μm/s. The addition of 0.1wt.% Dy promotes the planar-to-cellular transition. Moreover, the white Dy-containing phase does not form in the alloy for the planar interface growth (6μm/s), but it can occur in the boundary of eutectic cells for the cellular interface growth (30μm/s). A sketchy model of the planar and cellular growth is supposed to interpret it. TMS, 2013 Wang Lei State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, 710072, Xi'an, People's Republic of China aut Shen Jun State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, 710072, Xi'an, People's Republic of China aut Shang Zhao State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, 710072, Xi'an, People's Republic of China aut Zhang Jian-Fei State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, 710072, Xi'an, People's Republic of China aut Du Yu-Jun State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, 710072, Xi'an, People's Republic of China aut Fu Heng-Zhi State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, 710072, Xi'an, People's Republic of China aut JOM Springer US; http://www.springer-ny.com 65/11(2013-11-01), 1419-1425 1047-4838 65:11<1419 2013 65 11837 https://doi.org/10.1007/s11837-013-0734-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11837-013-0734-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wang Lei State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, 710072, Xi'an, People's Republic of China aut NATIONALLICENCE 700 1- Shen Jun State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, 710072, Xi'an, People's Republic of China aut NATIONALLICENCE 700 1- Shang Zhao State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, 710072, Xi'an, People's Republic of China aut NATIONALLICENCE 700 1- Zhang Jian-Fei State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, 710072, Xi'an, People's Republic of China aut NATIONALLICENCE 700 1- Du Yu-Jun State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, 710072, Xi'an, People's Republic of China aut NATIONALLICENCE 700 1- Fu Heng-Zhi State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, 710072, Xi'an, People's Republic of China aut NATIONALLICENCE 773 0- JOM Springer US; http://www.springer-ny.com 65/11(2013-11-01), 1419-1425 1047-4838 65:11<1419 2013 65 11837 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer