Suppression of discontinuous precipitation in AZ91 by addition of Sn |
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| Authors: | I. C. Jung Y. K. Kim T. H. Cho S. H. Oh T. E. Kim S. W. Shon W. T. Kim D. H. Kim |
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| Affiliation: | 1. Department of Metallurgical Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul, 120-749, Korea
2. Applied Science Division, Cheongju University, Naedeok-dong, Sangdang-gu, Cheongju, Chungbuk, 360-764, Korea
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| Abstract: | The effect of Sn (5 wt%) addition on the aging behavior of the AZ91 alloy has been investigated in the present study. The addition of Sn effectively suppresses the discontinuous precipitation during aging treatment. The aging response of the Sn containing AZ91 alloy is far better than that of the AZ91 alloy due to much higher density of continuous precipitation in the matrix. The yield strength and total elongation to failure at the peak aged condition of the AZ91 and Sn containing AZ91 alloys are 119.4 and 161.9 MPa and 8.8 and 8.6%, respectively, indicating that 35.6% increase of yield strength can be obtained by the addition of Sn in the AZ91 alloy maintaining almost same level of ductility. |
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