Abstract
Microstructure and room temperature tensile properties of pure hexagonal close-packed (HCP) Zirconium (Zr) with 3 at.%-15 at.% aluminum (Al) addition are studied. The results show that single HCP-α phase is obtained in ZrAl binary alloys when Al content is less than 9 at.%, and the face-centered cubic (FCC) AlZr3 phase is suggested to form when Al content is over 9 at.%. The morphology of α phase changes significantly with increasing aluminum content. Moreover, the Al addition strongly affects the mechanical properties of the ZrAl binary alloys. With increasing Al content, stacking fault and twinning appear during deforming, and the strength increased evidently, whereas, the elongation decreased. And excellent comprehensive mechanical properties (1122 MPa of strength and 9.6% of elongation) have been obtained by 9 at.% Al addition.
Published Version
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