Effect of aging treatments on the kinetics of fatigue crack growth in 7010 aluminum alloy

被引：69
作者：
Desmukh, Mohammed Noor
Pandey, R. K.
Mukhopadhyay, A. K.
机构：
[1] Indian Inst Technol, Dept Appl Mech, New Delhi 110016, India
[2] Def Met Res Lab, Hyderabad 500258, Andhra Pradesh, India
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 435卷 / 318-326期
关键词：
7010 aluminum alloy; aging; precipitates; fatigue crack growth rate; fatigue threshold; S-N curve; fatigue strength;
D O I：
10.1016/j.msea.2006.07.063
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The commercial Al alloy 7010, in the form of 15 mm thick plates, was subjected to three different artificial aging treatments following solution treatment and quenching, i.e. two-step aging leading to a near peak aged condition, single-step aging leading to the peak aged condition, and three-step aging leading to an over aged condition. The fatigue behavior of the resultant materials was studied. It was revealed that the fatigue crack growth rate (FCGR) of the near peak aged material is the least and that of the over aged material is the highest. The over aged material, however, exhibits a higher value of fatigue crack propagation threshold. The fatigue strength corresponding to 10(6) Cycles was further compared and the results revealed that the over aged material has a fairly high value of fatigue strength as compared to the peak aged alloy. These results are discussed in terms of the differences in the microstructures developed in the materials subjected to the different aging treatments. (c) 2006 Elsevier B.V. All rights reserved.
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页码：318 / 326
页数：9
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