电焊机2024，Vol.54Issue(2)：8-16,9.DOI:10.7512/j.issn.1001-2303.2024.02.02
Ti/TiAl异质叠层结构的强化机制、制造现状与未来发展趋势
Strengthening Mechanism,Present Situation and Development Trends of Ti/TiAl Heterogeneous Laminated Structures
摘要
Abstract
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.关键词
叠层结构/增材制造/强韧化机制/裂纹偏转/突破传统强度-塑性约束/韧性差异/主裂纹尖端能量Key words
laminated structure/additive manufacturing/strengthing and toughening mechanism/crack deflection/break of the trade-off relationship between strength and plasticity/resilience differences/main crack tip energy分类
矿业与冶金引用本文复制引用
孙靖,金阳,李送斌,王捷,张莹,尹玉环..Ti/TiAl异质叠层结构的强化机制、制造现状与未来发展趋势[J].电焊机,2024,54(2):8-16,9.基金项目
上海市科技委国际合作项目(22520730600) （22520730600）
