Frontiers in Materials
Frontiers Media S.A.
School of Engineering
In comparison with face-centered cubic (FCC) and body-centered cubic (BCC) metals and alloys, hexagonal close-packed (HCP) metals and alloys show distinct characteristics, such as atomic site occupation, anisotropic microstructure, and fewer slip systems, owing to their HCP lattice structure. Therefore, HCP metals and alloys have distinguished processing, microstructure, and properties. Several types of HCP metals and alloys, involving titanium, zirconium, magnesium, and so on, are extensively used in a variety of industrial and military sectors. Up to date, an increased requirement is still needed to improve the understanding of the relationships among processing, microstructures, and the resultant properties of HCP metals and alloys. In the meantime, surface modification may be conducted on the HCP metals and alloys to obtain better surface properties. However, many challenges are still open for the surface modification of HCP metals and alloys. In the contents of this topic, many endeavors are made to highlight the recent advances related to the processing methods (including surface modification), microstructures, and properties of HCP metals and alloys.
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