Influence of Interfacial Mechanical Properties on Elongation of Multilayered Composite Metals

摘要：

　　Multilayered composite metals (e.g.,pearlitic steels) composed of alternating layers of cementite and ferrite show unique and excellent mechanical properties,such as coexistence of strength and ductility.In this study,we investigate the influence of interfacial mechanical properties on the elongation of multilayered composite metals through molecular dynamics simulations.When the interface has weak interatomic bonding,it is difficult for mobile dislocations to transmit through the interface.Thus,the multilayered model shows small elongation due to the cleavage of the brittle phase under large tensile stress by stress partitioning between the brittle and ductile phases.On the other hand,when the interface has strong interatomic bonding,dislocations can easily transmit through the interface and thus the multilayered model displays larger elongation.

关键词： Interface Dislocation Crack Atomic Simulation Mechanical Property

作者: Tomotsugu Shimokawa

作者单位: School of Mechanical Engineering,Kanazawa University,Kakuma-machi,Kanazawa,Ishikawa 920-1192,Japan

会议类型: 国际会议

会议名称: 第13届国际断裂大会(ICF2013)

会议地点: 北京

会议语种:英文

页码: 1-6

在线出版日期: 2013-06-16（万方平台首次上网日期，不代表论文的发表时间）