Chaitanya, P and Goud, R and Raghavan, R and Ramakrishna, M and Prashanth, KG and Gollapudi, S (2022) Technical Note: Hardness, Corrosion Behavior, and Microstructural Characteristics of a Selective Laser Melted 17-4 PH Steel. In: Corrosion, 78 (6). pp. 465-472.
Full text not available from this repository.Abstract
In this work, we report the hardness and corrosion behavior of a selective laser melted 17-4 PH steel. Microstructure analysis using a scanning electron microscope (SEM) revealed a fine-grained material with a grain size of 1 μm. Phase analysis using SEM-EBSD (electron backscatter diffraction) revealed a ferritic-austenitic microstructure with 96% ferrite and 4% austenite. The material was also found to bear a combination of [removed] and [removed] fiber texture. The grain boundary character distribution revealed 68% low-angle grain boundaries, 10% CSL boundaries with predominantly Σ3 boundaries, and 21% high-angle grain boundaries. The Vickers hardness of this material was found to be quite high at 3.66±0.17 GPa which is probably due to the fine-grained structure of the material. Potentiodynamic polarization tests in 3.5 wt% NaCl solution yielded a corrosion current density, icorr of 1.4 × 10-6 A/cm2 and corrosion potential, Ecorr of -55 mVAg/AgCl electrode. Immersion tests in salt water for a period of 96 h showed hardly any pit formation although an AISI 304 stainless steel bearing grain size of 29 μm showed significant pit formation during the same time period.
| Item Type: | Journal Article |
|---|---|
| Publication: | Corrosion |
| Publisher: | NACE International |
| Additional Information: | The copyright for this article belongs to NACE International . |
| Keywords: | Austenitic stainless steel; Corrosive effects; Ferrite; Grain boundaries; Grain size and shape; Pitting; Scanning electron microscopy; Selective laser melting; Steel corrosion; Steel fibers; Textures; Vickers hardness, 17-4 PH steel; Corrosion behaviour; Ferritic; Fiber texture; Grainsize; PH steel; Pit formation; Pittings; Scanning electrons; Selective laser melting, Sodium chloride |
| Department/Centre: | Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) |
| Date Deposited: | 20 Oct 2022 04:34 |
| Last Modified: | 20 Oct 2022 04:34 |
| URI: | https://eprints.iisc.ac.in/id/eprint/77446 |
Actions (login required)
 |
View Item |
