Exploring the synergistic mechanisms of mechanical, microstructural morphology, and corrosion characteristics in inconel 718-AISI 430 dissimilar weldment joints using ERNiCrMo-4 and ER2209 fillers: a comparative performance analysis

IF 4.4 3区工程技术 Q1 ENGINEERING, CIVIL Archives of Civil and Mechanical Engineering Pub Date : 2025-02-22 DOI:10.1007/s43452-025-01155-0

Balram Yelamasetti, B. Tulasi Lakshmi Devi, B. Omprakash, Chilakamarri L. Aslesha, Sagar Shelare, Shubham Sharma, V. Nagabhushana Rao, Ehab El Sayed Massoud

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Abstract

The comparative study is made on dissimilar weldments of Inconel 718 and ferritic stainless steel 430 joined by pulsed current tungsten inert gas welding process using ERNiCrMo-4 and ER2209 fillers. The base metals were joined with multiple welds passes by keeping pulse frequency (4 Hz) constant. The samples were examined for internal defects using X-ray radiography along with visual inspection. To understand the weldability of two different fillers, the mechanical properties were assessed by conducting a tension test as well as the hardness measurement. The macro/microstructures were revealed at various zones using an optical microscope with different magnifications. Further, for measuring the corrosion rate at fusion zone, the weld surface area of 0.1257 cm² was submerged in a 3.5% NaCl solution. The weld strength of 542 MPa was observed for ERNiCrMo-4 weldment whereas 469 MPa was observed for ER2209 filler weldment. Higher yield strength to weld strength was observed in ERNiCrMo-4 filler weldment than in the ER2209 filler weldment. ERNiCrMo-4 filler weld exhibited better hardness (198 HV) at the weld zone than the ER2209 filler weld (185 HV). The presence of a fine-grained structure at the interface of ferritic stainless steel 430 provides evidence of efficient blending and solidification in ERNiCrMo-4 filler weld. Whereas the elongated grains and secondary phases could potentially reduce the strength of ferritic stainless steel 430 in ER2209 filler weld. The corrosion resistance of ER2209 weldment (1.117 mm/year) is higher than the ERNiCrMo-4 weldment (1.353 mm/year) because of the presence of fine grain structures along with higher dense filler alloy elements.

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来源期刊

Archives of Civil and Mechanical Engineering 工程技术-材料科学：综合

CiteScore

6.80

自引率

9.10%

发文量

201

审稿时长

4 months

期刊介绍： Archives of Civil and Mechanical Engineering (ACME) publishes both theoretical and experimental original research articles which explore or exploit new ideas and techniques in three main areas: structural engineering, mechanics of materials and materials science. The aim of the journal is to advance science related to structural engineering focusing on structures, machines and mechanical systems. The journal also promotes advancement in the area of mechanics of materials, by publishing most recent findings in elasticity, plasticity, rheology, fatigue and fracture mechanics. The third area the journal is concentrating on is materials science, with emphasis on metals, composites, etc., their structures and properties as well as methods of evaluation. In addition to research papers, the Editorial Board welcomes state-of-the-art reviews on specialized topics. All such articles have to be sent to the Editor-in-Chief before submission for pre-submission review process. Only articles approved by the Editor-in-Chief in pre-submission process can be submitted to the journal for further processing. Approval in pre-submission stage doesn''t guarantee acceptance for publication as all papers are subject to a regular referee procedure.