|
| Abstract No.: |
|
| Title: |
Microstructural and mechanical investigations of dissimilar metal joints of T91 and T22 ferritic steels
|
|
| Authors: |
Rutash Mittal* / Punjab Technical University, India
Buta Singh Sidhu/ I.K.Gujral Punjab Technical University, India
|
|
| Abstract: |
Ferritic steels are commissioned as one of the preferred structure materials for the boilers of nuclear and thermal power plants. The mechanical characterization and microstructural evolution of shielded metal arc welded dissimilar joint between ferritic SA213T91 (T91) and ferritic SA213T22 (T22) steels has been investigated by virtue of microstructures, micro-hardness, XRD and SEM/EDS analysis. Comparative performance of distinctive zones in the weldment i.e. heat affected zone, base metal and weld pool has been explored. The T91 HAZ and T22 HAZ zones of the weldment are observed to have high micro-hardness by virtue of martensitic morphology along with the presence of delta ferrite in T91 HAZ and carbide as well as intermetalics in T22 HAZ.
|
|