Fracture Analysis of Pneumatic Control Valve Rod Used for Nuclear Power Plants

Abstract:

The fracture of a carbon steel pneumatic control valve rod used for Nuclear Power Plants was analyzed in terms of the microstructure, inclusions and fractogragh by means of tensile test, charpy V-Notch impact test, optical microscopy, scanning electron microscopy and energy dispersive spectroscopy. The results indicated that the fracture of the rod is induced by the unqualified chemical composition: a large number of inclusions which distribute in grain boundaries reduce the material plasticity and toughness, and eventually cause fracture.

• Periodical: Advanced Materials Research (Volumes 1004-1005)
• Pages: 1359-1364
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1004-1005.1359
• Online since: August 2014
• Authors: Lei Yang, Yan Li*, Lu Zhang, Yun Ting Lai, Zhi Feng Luo, Wei Wei Yu
• Keywords: Fracture, Inclusion, Microstructure, Nuclear Power Plant (NPP), Pneumatic Control Valve Rod

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