Surface treatment of new type aluminum lithium alloy and fatigue crack behaviors of this alloy plate bonded with Ti-6Al-4V alloy strap

被引：11
作者：
Sun, Zhen-Qi [1 ]
Huang, Ming-Hui [1 ]
Hu, Guo-Huai [2 ]
机构：
[1] Cent S Univ, Sch Mech & Elect Engn, Changsha 410083, Hunan, Peoples R China
[2] 203 Res Inst China Ordnance Ind, Xian 710065, Peoples R China
来源：
MATERIALS & DESIGN | 2012年 / 35卷
关键词：
Non-ferrous metals and alloys; Surface treatments; Failure analysis; DESIGN; STRENGTH; OPTIMIZATION; PRETREATMENT;
D O I：
10.1016/j.matdes.2011.10.035
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Samples consisting of new aluminum lithium alloy (Al-Li alloy) plate developed by the Aluminum Company of America and Ti-6Al-4V alloy (Ti alloy) plate were investigated. Plate of 400 mm x 140 mm x 2 mm with single edge notch was anodized in phosphoric solution and Ti alloy plate of 200 mm x 20 (40) mm x 2 mm was anodized in alkali solution. Patterns of two alloys were studied at original/anodized condition. And then, aluminum alloy and Ti alloy plates were assembled into a sample with FM 94 film adhesive. Fatigue crack behaviors of the sample were investigated under condition of nominal stress sigma = 36 MPa and 54 MPa, stress ratio of 0.1. Testing results show that anodization treatment modifies alloys surface topography. Ti alloy bonding to Al-Li alloy plate effectively retards crack growth than that of Al-Li alloy plate. Fatigue life of sample bonded with Ti alloy strap improves about 62.5% than that of non-strap plate. (C) 2011 Elsevier Ltd. All rights reserved.
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页码：725 / 730
页数：6
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