I. A. Bataev 1, A. A. Bataev 1, V. I. Mali 2, M. A. Esikov 2, P. S. Yartsev 1, A.S. Gontarenko 1 1. Novosibirsk State Technical Univestity 2. Lavrentyev.

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Presentation transcript:

I. A. Bataev 1, A. A. Bataev 1, V. I. Mali 2, M. A. Esikov 2, P. S. Yartsev 1, A.S. Gontarenko 1 1. Novosibirsk State Technical Univestity 2. Lavrentyev Institute of Hydrodynamics SB RAS

1. Motivation 2. Structure of Al-Ti composite produced by explosive welding 3. Peculiarities of Al 3 Ti layer formation during annealing 4. Some results of mechanical tests 5. Conclusion

High specific stiffness High heat resistance Low density Good results in fatigue and impact tests Combining the properties of both the hard and refractory intermetallics and the ductile matrix Dilution of titanium with cheaper aluminum reduces the cost of material

Upper part of compositelower part of composite

Al distribution Ti distribution

1 hour5 hours100 hours Wavy interfaces plane interfaces

5 hours annealing 100 hours annealing

630 o C annealing, 30 min

Al 3 Ti

Near Al Middle of the Al 3 Ti layerNear Ti Al Al3Ti Ti

Dark field OMBtight field OM Btight field OM, Iron-rich precipitation in the Al-layer

Al –Al 3 Ti – Ti Al – Ti Al 3 TiTi

Explosive welding of Ti and Al plates with subsequent annealing is effective technological process for MIL composites production. Titanium trialuminide (Al 3 Ti) is the only intermetallic compound between Al and Ti formed under annealing. The most favorable place for Al 3 Ti growth are former vortexes The best intermetallic structure is on the Ti-Al 3 Ti boundary. On Al-Al 3 Ti boundary pores and microcracks were found One of the most important goals arisen during explosive welding and annealing is addressing the causes of residual stresses, pores and microcracks formation