Indentation fatigue of WC-Co cemented carbides

被引：27
作者：
Duszova, Annarnaria [1 ]
Hvizdos, Pavol [1 ]
Lofaj, Frantisek [1 ]
Major, Lukasz [2 ]
Dusza, Jan [1 ,3 ]
Morgiel, Jerzy [2 ]
机构：
[1] Slovak Acad Sci, Inst Mat Res, Kosice, Slovakia
[2] Stanislaw Staszic Univ Min & Met, Inst Met, PL-30059 Krakow, Poland
[3] Obuda Univ, Donat Banki Fac Mech & Safety Engn, Budapest, Hungary
来源：
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2013年 / 41卷
关键词：
Microindentation; Fatigue test; Focused ion beam (FIB); Transmission electron microscopy (TEM); Cermets; TEMPERATURE FATIGUE; PLASTIC-DEFORMATION; BEHAVIOR; NANOINDENTATION; HARDNESS;
D O I：
10.1016/j.ijrmhm.2013.04.006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Indentation fatigue of WC-Co systems with different microstructure parameters was investigated using instrumented indentation. A Berkovich indenter was used at maximum loads from 25 mN to 200 mN, then unloaded to 50% of the maximum load and repeatedly re-loaded to 100 cycles. FIB/TEM observations have been used for characterization of the deformation and damage mechanisms in the zone beneath the indenter to study the influence of microstructure parameters on fatigue and fatigue mechanisms. Deformation induced fcc-hcp phase transformation of Co binder was the main mechanisms in the system with higher volume fraction of binder and slip in WC grains and fracture of WC/WC bridges in the system with lower Co content and higher contiguity. These mechanisms result in different fatigue behavior of the systems. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：229 / 235
页数：7
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