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| The internal friction behaviors of Ti/Al composite powder compact during low-temperature sintering process |
| Received:March 05, 2019 Revised:March 25, 2019 |
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| DOI： |
| KeyWord:internal friction; Ti/Al composite powder compact; internal stress; interface; diffusion reaction |
| Author | Institution |
| LI Xianyu |
延安大学 物理与电子学院 |
| HAO Gangling |
延安大学 物理与电子学院 |
| WANG Weiguo |
延安大学 物理与电子学院 |
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| Abstract: |
| Aiming to understand the sintering mechanism between Ti and Al, the low temperature internal friction behaviors of Ti/Al composite powder compact were investigated systemically based on internal friction measurements in the present paper. The experimental results show that the internal friction behaviors of the Ti/Al composite powder compact could be affected significantly by temperature. The value of the irreversible internal friction peak at about 270oC decreases with increasing frequencies and increases with increasing Al contents. Thus, it is suggested that this internal friction peak is attributed to residual stress relaxation during heating process. Meanwhile, the temperature position of the internal friction peak at about 230oC during cooling process shifts to high temperature, which has a slight relaxation characteristic. It can be concluded that the internal friction peak originates from sliding of grain boundary formed due to recrystallization during sintering process. |
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