The structural design and superplastic forming/diffusion bonding of Ti2AlNb based alloy for four-layer structure

被引：64
作者：
Du, Zhihao [1 ]
Jiang, Shaosong [1 ]
Zhang, Kaifeng [1 ]
Lu, Zhen [1 ]
Li, Baoyong [2 ]
Zhang, Dalin [3 ]
机构：
[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
[2] Beijing Hangxing Technol Dev Co, Beijing 100084, Peoples R China
[3] Nanchang Vocat Coll, Nanchang 330004, Peoples R China
来源：
MATERIALS & DESIGN | 2016年 / 104卷
关键词：
Ti2AlNb-based alloy; Finite element analysis; Superplastic forming; Diffusion bonding; Honeycomb structure; MECHANICAL-PROPERTIES; TI-22AL-25NB ALLOY; TITANIUM; 6AL-4V; HEAT-TREATMENT; MICROSTRUCTURE; FABRICATION;
D O I：
10.1016/j.matdes.2016.05.046
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The multilayer structure of Ti2AlNb based alloy was fabricated based on the superplastic forming/diffusion bonding (SPF/DB) in this paper. The properties of superplasticity and diffusion bonding of Ti-22Al-27Nb alloy were investigated. The uni-axial tensile experiment showed that the tensile elongation reached up to 236% at the temperature of 970 degrees C with the strain rate of 3 x 10(-4) s(-1). Based on the superplasticity, the finite element analysis of structural design was carried out and the results showed that the honeycomb structure was flexible. And the diffusion bonding experiment was carried out at the temperature of 950 degrees C and 970 degrees C. Combining the microstructure of bonding interface with shear strength of different joints, the diffusion bonding parameter for present alloy was: 970 degrees C/10 MPa/2 h. The thickness distribution of the final structure was uniform and consistent with that of the FEA result, and the mechanical properties after SPF/DB reduced and the compressive strength of this structure behavior was about 7.7 MPa. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：242 / 250
页数：9
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