Ti/TiAl异质叠层结构的强化机制、制造现状与未来发展趋势OACSTPCD

The Ti/TiAl micro-laminated material system has excellent strength,toughness,and high-temperature properties.This system effectively overcomes sudden cracking during the preparation and processing of titanium-aluminum alloys.This paper summarizes the manufacturing methods,strengthening and toughening mechanisms,and typical failure modes of the Ti/TiAl laminated structure.Numerous studies have shown that compared with traditional single materials or non-continuously reinforced composites,the laminated composite structure significantly improves the strength and toughness through the introduction of the toughness difference of multiple materials and multilayer interfaces.The main strengthening mechanism is the toughness difference of multiple materials and the introduction of multilayer interfaces in the composite structure,which causes crack deflection and secondary cracking during crack growth.The deflection and bridging effect of cracks greatly consume the tip energy of the main crack and inhibit its continuous growth.This structure breaks through the traditional trade-off relationship between strength and toughness,bringing new development directions to the field of materi-als science and engineering.