Abstract: The aim of this study is optimizing the creep properties of T91 weld joints at high temperature and pressure. After welding, tube portions were subjected to different cycles of post welding heat treatment, than creep tests at 650°C and a range of pressure values. Crept specimens were exterminated in order to determine the weakest zones in the joint.
It was found that the rupture occurs in the base metal at high pressures and in the heat affected zone at low ones.
The creep rupture time of weld joint is lower than those of the base metal.Microstructure after creep is compared to the original one, to better understand the impact of creep exposure on microstructure evolution and to evaluate the strength of weld joints.
Keywords: Power plants, T91, Environment, Welding, pwht, creep, SEM investigations.
Title: Experimental Study On Creep Strength Of The Weld Joints Of 9%Cr Heat Resistant Steels
Author: Seifallah Fetni, Chokri Boubahri, Jalel Briki
International Journal of Mechanical and Industrial Technology
ISSN 2348-7593 (Online)
Research Publish Journals
