Microstructural dependence of fracture toughness in high-strength 7000 forging alloys

被引：60
|
作者：
Cvijovic, Z. [1 ]
Rakin, M. [1 ]
Vratnica, M. [2 ]
Cvijovic, I. [3 ]
机构：
[1] Univ Belgrade, Fac Technol & Met, Belgrade 11120, Serbia
[2] Univ Montenegro, Fac Technol & Met, Podgorica 81000, Montenegro
[3] Inst Nucl Sci Vinca, Belgrade 11001, Serbia
来源：
ENGINEERING FRACTURE MECHANICS | 2008年 / 75卷 / 08期
关键词：
7000 aluminium alloys; microstructure; image analysis; toughness; modelling;
D O I：
10.1016/j.engfracmech.2007.10.010
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The effects of microstructural parameters associated with the coarse intermetallic phases particles and precipitates on the fracture toughness of the overaged 7000 alloy forgings are investigated. Detailed microstructural and fractographic analysis together with fracture toughness tests are carried out using three alloys with different (Fe + Si) contents. The fracture mechanisms are identified and area fractions of different fracture modes are assessed. The data are then quantitatively correlated to plane-strain fracture toughness, K-Ic, and the bulk microstructural attributes estimated via image analysis. A multiple micromechanism-based model is developed, which accurately describes the dependence of K-Ic on individual microstructural parameters. (C) 2007 Published by Elsevier Ltd.
引用
收藏
页码：2115 / 2129
页数：15
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