爆炸焊接+轧制制备TA2/TC4钛合金复合材料界面微结构及力学行为研究

doi:10.3901/JME.260177

摘要/Abstract

摘要： 针对高强度钛合金强度高韧性差，高韧性钛合金强度低韧性好的特征，采用爆炸焊接+轧制的方式制备高强和高韧TA2/TC4钛合金复合材料。通过结合面微结构表征分析，结合拉伸、剪切以及弯曲试验对复合材料的性能进行检测，分析试样的失效行为，揭示微结构与力学行为的关联机制。研究结果表明：爆炸焊接TA2/TC4钛合金复合材料界面呈波纹状形貌，轧制后结合面呈现近似直线的形貌；在界面处有动态回复和再结晶发生，基体晶粒呈现柱状或棒状拉长的特征；TA2/TC4复合材料拉伸强度在780～801 MPa，弯曲强度在1 142.58～1 267.19 MPa；结合面剪切强度在134 MPa～185 MPa，呈现离散的状态。爆炸焊接+轧制可以实现不同厚度高强韧复合材料制备，为不同高强高韧金属复合材料制备提供新思路。

关键词: TA2/TC4复合材料, 爆炸焊接+轧制, 微观组织结构, 力学行为, 失效机理

Abstract: Based on the characteristics of high-strength titanium alloys with high strength but poor toughness, and high-toughness titanium alloys with low strength but good toughness, high-strength and high-toughness TA2/TC4 titanium alloy composites were prepared by the method of explosive welding followed by rolling. The microstructure of the bonding interface was characterized, and the properties of the composites were tested by tensile, shear, and bending experiments. And the failure behavior of the samples was analyzed to reveal the correlation mechanism between microstructure and mechanical behavior. The results show that the interface of the explosively welded TA2/TC4 titanium alloy composite presents a wavy morphology, while the rolled interface shows an approximately straight morphology. Dynamic recovery and recrystallization occur at the interface, and the matrix grains exhibit columnar or rod-like elongation. The tensile strength of the TA2/TC4 composite ranges from 780 to 801 MPa, and the bending strength ranges from 1142.58 to 1267.19 MPa. The shear strength of the bonding interface ranges from 134 MPa to 185 MPa, showing a discrete state. Explosive welding + rolling can realize the preparation of high-strength and high-toughness composite materials of different thicknesses, providing a new approach for the preparation of various high-strength and high-toughness metal composite materials.

Key words: TA2/TC4 composite material, explosive welding + rolling, microstructure, mechanical behavior, failure mechanism

中图分类号:

TG156

周强, 陆红红, 郭登刚, 陈鹏万, 王宝雨. 爆炸焊接+轧制制备TA2/TC4钛合金复合材料界面微结构及力学行为研究[J]. 机械工程学报, 2025, 62(6): 100-110.

ZHOU Qiang, LU Honghong, GUO Denggang, CHEN Pengwan, WANG Baoyu. Microstructure and Mechanical Behavior of TA2/TC4 Titanium Alloy Composites Fabricated by Explosion Welding + Rolling[J]. Journal of Mechanical Engineering, 2025, 62(6): 100-110.

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