Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7970481 | Materials Characterization | 2015 | 37 Pages |
Abstract
The interface region of welded A508-Alloy 52Â M is characterized by scanning probe microscope (SPM) techniques, scanning electron microscopy (SEM)/energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM)/Energy Dispersive Spectroscopy (EDS) and scanning vibrate electrode technique (SVET). The regions along the welded A508-Alloy 52Â M interface can be categorized into two types according to their different microstructures. In the type-I interface region, A508 and Alloy 52Â M are separated by the fusion boundary, while in the type-II interface region, A508 and Alloy 52Â M are separated by a martensite zone. A508, martensite zone and grain boundaries in Alloy 52Â M are ferromagnetic while the Alloy 52Â M matrix is paramagnetic. The Volta potentials measured by scanning Kelvin probe force microscopy (SKPFM) of A508, martensite zone and Alloy 52Â M follow the order: V52Â MÂ >Â VA508Â >Â Vmartensite. The corrosion behavior of A508-Alloy 52Â M interface region is galvanic corrosion, in which Alloy 52Â M is cathode while A508 is anode. The martensite dissolves faster than Alloy 52Â M, but slower than A508 in the test solution.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Siyan Wang, Jie Ding, Hongliang Ming, Zhiming Zhang, Jianqiu Wang,