摘要
层状金属复合材料在航天航空,汽车和核能领域发挥越来越重要的作用。对比于单一金属或合金,层状金属复合材料呈现出超高的强度、断裂韧性、延伸率和成型能力。综合介绍承载变形过程中层状金属复合材料各种力学性能,断裂行为和增韧机制。通过调控层状结构参数,复合材料可获得较高的性能指标,在宏观尺度下,界面结合状态和层厚尺度可有效地影响层状金属复合材料的断裂韧性和断后延伸率,这两种性能一般不符合混合法则,而层状金属复合材料的弹性行为、屈服强度和抗拉强度基本符合混合法则。在微观尺度下,层状金属复合材料的断裂行为和增韧机制会呈现明显的尺度效应。
Laminated metal composites play more and more important role in aerospace,automobile and nuclear fields,which reveals super-high strength,toughness,ductility and formability.This paper presents various mechanical proper⁃ties,fracture behaviors and toughening mechanisms during the loading and deformation and the high mechanical proper⁃ties can be obtained by adjusting the fabrication and laminated structure parameters.In the macro-scale,the interface bonding status and layer thickness can effectively influence the fracture toughness and elongation of laminated metal composites,and the two properties do not fit the rule of mixture.However,the elastic properties,yield strength and ulti⁃mate strength basically follow the rule of mixture.In the micro scale,the fracture behavior and toughening mechanisms of laminated composites reveal obvious size effects.
作者
张博洋
李泽斌
刘宝玺
ZHANG Boyang;LI Zebin;LIU Baoxi(School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300130,China;Key Laboratory of Materials Laminating Fabrication and Interface Control Technology,Hebei University of Technology,Tianjin 300130,China;Reasearch Institute for Equipment Materials,Hebei University of Technology,Tianjin 300130,China;Zhongtong Bus Holding Co.Ltd,Liaocheng,Shandong 252000,China)
出处
《河北工业大学学报》
CAS
2020年第4期1-11,共11页
Journal of Hebei University of Technology
基金
国家自然科学基金青年科学基金(51601055)
河北省科技计划项目(51211017D)
河北省自然科学基金青年基金(E201620218)
河北省高等学校科技研究项目青年基金(QN2016029)。
关键词
层状金属复合材料
增韧机理
断裂行为
混合法则
尺度效应
laminated metal composites
fracture behavior
toughening mechanism
rule of mixture
size effect
