Investigation of Microstructure and Chemical Analysis Along Weldments AISI 410 MSS/ER Nicrmo-3 | ||
| Engineering and Technology Journal | ||
| Article 12, Volume 36, 5A, May 2018, Pages 564-573 PDF (1.14 M) | ||
| DOI: 10.30684/etj.36.5A.12 | ||
| Author | ||
| Emad S Al-Hassani | ||
| Abstract | ||
| In this research work the weldability of AISI 410 martensitic stainless steels (SS) LP-blades of steam turbine joined by GTAW (gas tungsten arc welding); inconel-3 filler wire was investigated. To study the mechanical performance and microstructural characteristics of the welded joint, the optical-microscopic and micro-hardness were applied along the cross-section of specimens, respectively. Line/Point and EDS technique were used to predict the chemical composition of welding joint. WDS MAP/ WDS LINK (Energy Dispersive Spectroscopy) used to know the movement of elements along the weldments. Results showed that micro-hardness along the HAZ regions increased. Microstructure photographs revealed γ-austenite as predominate phase along weld-metal. X-ray image with magnification 10μm showed two phases: dendritic (dark region) and interdendrite (light region) phases. Moreover, coarse grains appeared in HAZ zone of both weldments. In addition, chemical composition appeared carbon aggregated at interface. | ||
| Keywords | ||
| Turbine Blade; GTRW; Martensitic Stainless Steels; Filler Wire | ||
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