Influence of portevin-le chatelier effect on rupture mode of alloy 718 specimens

被引：0
|
作者：
Garat, V. [1 ]
Cloue, J-M. [1 ]
Viguier, B. [1 ]
Andrieu, E. [1 ]
机构：
[1] Framatome ANP Fuel Div, F-69456 Lyon, France
来源：
Superalloys 718, 625, 706 and Derivatives, Proceedings | 2005年
关键词：
jerky flow; intergranular fracture; oxidation;
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
A set of tensile tests has been carried out under air environment in the temperature range [450 degrees C-700 degrees C] in order to characterize the interactions between oxidation assisted intergranular cracking and Portevin - Le Chatelier effect. It is shown that the occurrence of jerky flow stops the intergranular damaging mechanism. The construction of a Dynamic strain aging-Intergranular fracture-PLC instabilities map is then proposed. The surprising relation between crack initiation disappearance and PLC instabilities of type C in the temperature range explored is discussed. Finally the assumption of the occurrence of such phenomenon at the tip of a propagating crack is addressed.
引用
收藏
页码：551 / 557
页数：7
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