Next Article in Journal
Probing Trace Elements in Human Tissues with Synchrotron Radiation
Previous Article in Journal
Inclusion Complexes of Naringenin in Dimethylated and Permethylated β-Cyclodextrins: Crystal Structures and Molecular Dynamics Studies
Previous Article in Special Issue
Dissimilar Infrared Brazing of CoCrFe(Mn)Ni Equiatomic High Entropy Alloys and 316 Stainless Steel
Open AccessArticle

Control of Microstructure for Co-Cr-Mo Fibers Fabricated by Unidirectional Solidification

1
Institute for Material Research, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
2
New Industry Creation Hatchery Center (NICHe), Tohoku University, 6-6-10, Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
3
C&A Corporation, 6-6-40, Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
*
Author to whom correspondence should be addressed.
Crystals 2020, 10(1), 11; https://doi.org/10.3390/cryst10010011
Received: 28 November 2019 / Revised: 22 December 2019 / Accepted: 24 December 2019 / Published: 26 December 2019
(This article belongs to the Special Issue Mechanical and Microstructural Characterization of Metals and Alloys)
Co-Cr-Mo alloy fibers of 2 mm in diameter were fabricated from the melt at 1, 2, and 5 mm/min growth rates by unidirectional solidification using an alloy-micro-pulling-down (A-µ-PD) method to control the microstructure. All elements, Co, Cr, and Mo, were distributed in stripes elongated along the growth direction due to constitutional undercooling. Both Co-Cr-Mo fibers fabricated at 2 and 5 mm/min growth rates were composed of the γ phase with a face-centered cubic structure (fcc-γ phase) and ε-phase with a hexagonal close-packed structure (hcp-ε phase), and the ratio of the fcc-γ phase in the fiber fabricated at 5 mm/min growth rate was higher than that in the fiber fabricated at 2 mm/min. The results suggest that a faster growth rate increases the ratio of the fcc-γ phase in the Co-Cr-Mo fiber fabricated by unidirectional solidification. View Full-Text
Keywords: growth from melt; solidification; alloys growth from melt; solidification; alloys
Show Figures

Figure 1

MDPI and ACS Style

Abe, S.; Yokota, Y.; Nihei, T.; Yoshino, M.; Yamaji, A.; Toyoda, S.; Sato, H.; Ohashi, Y.; Kurosawa, S.; Kamada, K.; Yoshikawa, A. Control of Microstructure for Co-Cr-Mo Fibers Fabricated by Unidirectional Solidification. Crystals 2020, 10, 11.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop