TY - JOUR ID - TI - Investigation of Microstructure and Chemical Analysis Along Weldments AISI 410 MSS/ER Nicrmo-3 AU - Emad S. Al-Hassani PY - 2018 VL - 36 IS - 5 Part (A) Engineering SP - 564 EP - 573 JO - Engineering and Technology Journal مجلة الهندسة والتكنولوجيا SN - 16816900 24120758 AB - 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.

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