Quick Search:       Advanced Search
杨宏亮,薛河.膜致应力对应力腐蚀裂尖力学特性的影响[J].稀有金属材料与工程(英文),2017,46(12):3595~3600.[Yang Hongliang and Xue He.Effect of Film-Induced Stress on Mechanical Properties at Stress Corrosion Cracking Tip[J].Rare Metal Materials and Engineering,2017,46(12):3595~3600.]
Effect of Film-Induced Stress on Mechanical Properties at Stress Corrosion Cracking Tip
Download Pdf  View/Add Comment  Download reader
Received:September 30, 2016  Revised:February 12, 2017
DOI:
Key words: stress corrosion cracking  film-induced stress  stress intensity factor  oxide film  Ni-based alloys
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
Author NameAffiliation
Yang Hongliang and Xue He  
Hits: 99
Download times: 
Abstract:
      Oxide film rupture theory has become one of the most popular models to quantitatively predict the stress corrosion cracking (SCC) rate at crack tip of nickel-based alloys in high temperature and high pressure environments, and stress intensity factor has become an important parameter to measure the stress corrosion cracking rate. In order to further understand the fracture mechanism of the oxide film and the driving force of crack growth, film-induced stress intensity factor is proposed. To understand the effect of film-induced stress intensity factor on the micro-mechanical state at the tip of EAC, the stress-strain in the base metal at the EAC tip was simulated and discussed using a commercial finite element analysis code. And then the effect of film-induced stress intensity factor on Mises stress, equivalent plastic strain, tensile stress, tensile strain and tensile plastic strain gradient of crack tip was obtained, which provides a parameter to improve the quantitative predication accuracy of EAC growth rate of nickel-based alloys and austenitic stainless steels in the important structures of nuclear power plants. Therefore the oxide film rupture theory was improved.