The influence of interface reaction zone on interfacial fracture toughness of SiC fiber reinforced titanium matrix composites. Issue 10 (3rd October 2018)

• Record Type: Journal Article
• Authors: Sun, Q.; Yang, Y. Q.; Huang, B.; Luo, X.; Xue, C. L.
• Is Part Of: Composite interfaces. Volume 25:Issue 10(2018)
• Page Start: 929
• Page End: 947
• Publication Date: 2018-10-03
• Subjects: Interfacial fracture toughness -- shear-lag method -- push-out -- interface reaction zone; Composite materials -- Periodicals; 620.11805
• DOI: 10.1080/09276440.2018.1440847
• Languages: English
• ISSNs: 0927-6440

Abstract

Abstract: A fiber-reaction zone-matrix three-phase model is developed to evaluate the interfacial fracture toughness of titanium alloys reinforced by SiC monofilaments. Based on fracture mechanics, theoretical equations of G IIc are presented, and the effects of several key factors such as crack length and the interface reaction zone thickness on the critical applied stress necessary for crack growth and interfacial fracture toughness are discussed. Finally, the interfacial fracture toughness of typical composites including Sigma1240/Ti-6Al-4V, SCS-6/Ti-6Al-4V, SCS-6/Timetal 834, SCS-6/Timetal 21s, SCS-6/Ti-24Al-11Nb and SCS-6/Ti-15V-3Cr are predicted by the model. The results show that the model can reliably predict the interfacial fracture toughness of the titanium matrix composites. Abstract : dA is the incremental increase in crack surface area, and dU ex is the work done by the loading system, and dU se is the change in strain energy of the system due to crack advance, dU fr is the work done in frictional sliding at the interface.