文章信息/Info

Title:

Research on Interlayer Fracture Properties of Ti/Al3Ti Layered Composite

作者:

王澤明;周培俊;汪恩浩;袁丁;姜風春;果春煥;

哈爾濱工程大學材料科學與化學工程學院超輕材料與表面技術教育部重點實驗室;

Author(s):

WANG Zeming;  ZHOU Peijun;  WANG Enhao;  YUAN Ding;  JIANG Fengchun; GUO Chunhuan

Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University

關鍵詞:

層狀復合材料Ti/Al3Ti; I+II型層間斷裂; II型層間斷裂; 層間斷裂研究; 層間能量釋放率

Keywords:

metal-intermetallic laminate (MIL) composite;  I+II interlaminar fracture;  II interlaminar fracture;  interlaminar fracture behavior;  inter-layer energy release rate

DOI:

10.7502/j.issn.1674-3962.2017.02.11

文獻標志碼:

A

摘要:

金屬間化合物基層狀復合材料Ti/Al3Ti是采用Ti-6Al-4V箔和Al箔按照一定順序疊加后,在真空環境下熱壓燒結成由韌性金屬Ti和金屬間化合物Al3Ti組成的疊層結構。利用ENF(End-Notch-Flexure)和MMF(Mixed-Mode-Flexure)測試方法,對Ti/Al3Ti層狀復合材料的II型及I+II型層間斷裂能、層間斷裂行為以及能量釋放率等方面進行了研究。結果表明,Ti/Al3Ti層間斷裂時,裂紋在復合材料界面處發生起裂,而在傳播過程中發生偏轉,最終導致Al3Ti層開裂。由此可見,在實驗過程中裂紋的表現形式是在Ti/Al3Ti界面及Al3Ti層中共同擴展;I+II型層間起裂能量釋放率GI+II為46J/m2,II型層間起裂能量釋放率GII為1453J/m2,表明II型層間斷裂比I+II型層間斷裂更困難。

Abstract:

Metal-Intermetallic Laminate (MIL) composite Ti/Al3Ti, which is a class of laminated material and consists of ductile Ti layers and intermetallic Al3Ti layers, is sintered using both Ti-6Al-4V foils and Al foils. In this paper, the methods of ENF (End-Notch-Flexure) test and MMF(Mixed-Mode-Flexure) test are used to investigate the interlaminar fracture energy of two fracture types (type II and type I + II), the interlaminar fracture behavior and the energy release rate of MIL composite Ti/Al3Ti. The results show that the crack initiation occurred at the interface between the layers, and the deflection occurred in the course of the crack propagation, which led to the crack of Al3Ti layer. Therefore, the cracks finally appeared to propagate at both the interface of composite and the Al3Ti layer. The interlaminar fracture energy release rates GI+II and GII are 46 J/m2 and 1453 J/m2, respectively, which show that type II interlaminar fracture crack requires more energy than that of type I + II.