| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1602558 | International Journal of Refractory Metals and Hard Materials | 2016 | 5 Pages |
Abstract
The formation of Kirkendall porosity and its role in determining β â δ transformation types in Nb-Ti-Al alloys has been reported. The Kirkendall porosity appears in Nb-Ti-Al alloys due to the discrepancy in diffusion rates of Nb, Ti and Al atoms. It is proposed that Kirkendall porosity can serve as a criterion in judging the types of β â δ phase transformations: The appearance of Kirkendall porosity indicates the long-range diffusional transformation and excludes the massive transformation. Moreover, the criterion is also applicable in some other alloy systems in judging the phase transformation types. Besides, Kirkendall porosity in Nb-Ti-Al alloys with different hot-pressing durations exhibits different dimensions.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Zhiwu Shi, Hua Wei, Hongyu Zhang, Tao Jin, Xiaofeng Sun, Qi Zheng,