Fatigue behavior of diffusion bonded powder metallurgy steel with heterogeneous microstructure

被引：26
作者：
Abdoos, H. [1 ]
Khorsand, H. [1 ]
Shahani, A. R. [2 ]
机构：
[1] KN Toosi Univ Technol, Fac Mech Engn, Div Mat, Tehran, Iran
[2] KN Toosi Univ Technol, Fac Mech Engn, Fracture Mech Lab, Tehran, Iran
来源：
MATERIALS & DESIGN | 2009年 / 30卷 / 04期
关键词：
Powder metallurgy; Fatigue; Microstructure; IRON;
D O I：
10.1016/j.matdes.2008.06.050
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Fatigue is an important field for the application of powder metallurgy steels in service conditions. The fatigue performance of as-sintered powder metallurgy steel depends on microstructure and density. This concept requires a deep understanding of materials microstructure. Various microstructures in powder metallurgy steels, depending on alloying methods, have different responses against cyclic loading. Focus of this article is to quantify the fatigue behavior of sintered steel material based on diffusion bonded powders in relation to the microstructure. In this study, fatigue behavior of Distaloy AE sintered steels, with two different carbon contents, under different periodic loading have been investigated. Metallugraphy and fractography examinations on fatigue loaded samples revealed the positive effect of microstructure heterogeneity on fatigue cracks behavior. (C) 2008 Elsevier Ltd. All rights reserved.
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收藏
页码：1026 / 1031
页数：6
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