Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
790803 | International Journal of Pressure Vessels and Piping | 2011 | 5 Pages |
Abstract
The creep fracture of T92/HR3C dissimilar weld joints is investigated. HR3C austenitic steel is welded with T92 martensitic steel to obtain a T92/HR3C weld joint. After welding, creep tests are carried out at 625 °C in the stress range 110–180 MPa. The results indicate that the creep fracture mechanism is dependent on stress. When stresses ≥140 MPa, the fracture location is at the T92 base material and the connection of adjacent dimples results in transcrystalline fracture. For stresses <140 MPa, the fracture location is at the T92 coarse-grained heat affected zone and growth of M23C6 particles as well as Laves phase (Fe2(W, Mo)) precipitation on the grain boundaries leads to intergranular fracture.
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Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
Jian Cao, Yi Gong, Zhen-Guo Yang, Xiao-Ming Luo, Fu-Ming Gu, Zheng-Fei Hu,