The influence of pH on thermal fatigue crack propagation behavior of WC-8Co cemented carbide

被引：4
|
作者：
Zhang, Zhongjian [1 ]
Xu, Tao [1 ]
Peng, Wen [1 ]
Chen, Ding [2 ]
Jiang, Yong [2 ]
Shi, Yuanyuan [2 ]
机构：
[1] State Key Lab Cemented Carbide, Zhuzhou 412000, Hunan, Peoples R China
[2] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China
来源：
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2013年 / 40卷
关键词：
Cemented carbide; Thermal fatigue; Crack propagation; Corrosion; TUNGSTEN-CARBIDE; MECHANICAL-PROPERTIES; SHOCK; CORROSION; STRENGTH; CERMETS;
D O I：
10.1016/j.ijrmhm.2013.01.019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The notch quench method was used to study the influence of pH values on thermal fatigue crack propagation behavior of WC-8Co cemented carbide. The pH values of the aqueous solutions were varied between 5.2, 7.4 and 8.8. The results show that the corrosive environment has a strong influence on the thermal fatigue crack propagation behavior of the materials for testing. Acidic and alkali environment can reduce the thermal fatigue crack initial life and increase the crack propagation rate. Thermal attack results in a significant loss of hardness and the effect is even visible in an acidic environment. In all cases, only WO3 and COWO4 phases are present in the oxides. The mode of crack propagation requires the simultaneous actions of thermal attack and corrosion. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：14 / 18
页数：5
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