5 Experimental and numerical investigation of microstructure and mechanical behavior of titanium/steel interfaces prepared by explosive welding

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:689

Article

Chu, Qiaoling¹  Zhang, Min¹  Li, Jihong¹  Yan, Cheng² 

[1] Xian Univ Technol, Coll Mat Sci & Engn, Xian 710048, Peoples R China

[2] Queensland Univ Technol, Fac Sci & Engn, Sch Chem Phys & Mech Engn, Brisbane, Qld 4001, Australia

关键词: Explosive welding;    Intermetallics;    Nanoindentation;    Smoothed Particle hydrodynamic;   

DOI  :  10.1016/j.msea.2017.02.075

来源: Elsevier

【 摘 要 】

This paper presents a systematic study of structure and mechanical behavior of Ti/Fe explosive -bonded interfaces. The transient fluid-like behavior at the bonding zone is simulated using Smoothed Particle Hydrodynamic (SPH) numerical method. The interface is featured by a wave structure, resulted from heavy plastic deformation during the explosive welding. Melted zone resulted from the trapped jetting is surrounded by strongly deformed bulk materials. Fe2Ti intermetallic compounds with a mixture of FeTi+Fe phases are observed in the melted zone. A reaction layer (similar to 700 nm) consisted of nano-sized FeTi grains is formed at Ti/Fe material boundary. Nanoindentation tests and fracture observation confirm the brittle nature of Fe-Ti intermetallics formed in the explosive-bonded joint. Extremely temperature accumulated near the interface leads to recovery and recrystallization in deformed grains, which can accommodate relatively large strain near the interface.

【 授权许可】

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