Crack tip damage mechanism under monotonic and cyclic loading conditions

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外文摘要：Fracture resistance of AISI 304LN stainless steel has been examined by monotonic and cyclic J-integral tests, the latter being carried out using periodic unloading as per pre-determined R-ratio. The cyclic fracture resistance is found to be almost 1/5th of its corresponding monotonic value. The deterioration of fracture resistance under cyclic loading has been attributed to crack tip resharpening due to smearing and smashing of voids owing to rubbing of adjacent crack surfaces in the compressive load cycles.

外文关键词：

fracture toughnessAISI 304LN steelmonotonic Jcyclic JSEM

作者：

H. Roy、S. Sivaprasad、S. Tarafder、K. K. Ray

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作者单位：

NDT & Metallurgy Group, Central Mechanical Engineering Research Institute, Durgapur, India

Material Science and Technology Division, National Metallurgical Laboratory, Jamshedpur, India

Dept. of Metallurgical and Materials Engg., Indian Institute of Technology, Kharagpur-721302, India

出版年：

2010

Key engineering materials

ISSN：1013-9826

年,卷(期)：2010.417/418