Influence of Yield Stress on the SCC Creep Mechanical Field and Growth Rate at the Tip of 304 Stainless Steel
Author of the article:CUI Yinghao;ZHANG Jianlong;LI Xiaolei
Author's Workplace：School of Mechanical&Electronic Engineering,Zhongyuan University of Technology,Zhengzhou 450007,China;School of Mechanical Engineering,Xi’an University of Science and Technology,Xi'an 710054,China;Xi’an Special Equipment Inspection Institute,Xi'an 710065,China
Key Words：304 stainless steel stress corrosion cracking creep at crack tip creep rate
Abstract：
In order to investigate the influence of material plasticity on the creep field of SCC crack tip,a finite element model of SCC crack tip creep field was established by using compact tensile specimens of 304 austenite stainless steel.The influence of yield strength of different materials on crack tip creep and creep rate was studied by ABAQUS numerical simulation software and by using yield strength to characterize the plastic change of materials.The results show that the high creep variable area is mainly distributed in the near crack tip area,and the yield strength has a great influence on the creep field of SCC crack tip.With the increase of yield strength,the creep variable and creep rate of crack tip also increase.With the continuous advance of creep,the creep rate tends to the same level.With the continuous increase of time,the creep rate changed little,and the crack growth rate increased linearly with the crack length.
