Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7716533 | International Journal of Hydrogen Energy | 2015 | 11 Pages |
Abstract
Precipitation strengthened austenitic stainless steels are widely used in hydrogen related applications. However, their applications may face hydrogen damage resulting in hydrogen-induced delayed failure. Results show that the weld is more sensitive to fracture and hydrogen-induced failure than the matrix. High density curved dislocations, abundant of large size precipitates and considerable γⲠprecipitates coarsening are found in the weld. Large size precipitates are found to be major hydrogen traps and preferential microcrack nucleation sites. The γⲠprecipitates coarsening make the weld more ductile than the matrix. With the decrease of the applied stress, hydrogen-induced cracking mechanism in the weld changes from brittle transgranular fracture to brittle intergranular fracture.
Related Topics
Physical Sciences and Engineering
Chemistry
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Authors
Yingjie Yan, Yu Yan, Yang He, Jinxu Li, Yanjing Su, Lijie Qiao,