Investigation of Microstructure and Mechanical Properties of MIG Welded Mild Steel Plates

Rao, T.V. Hanumantha; Krishna, G. Vamshi

doi:10.18280/acsm.430409

Cited by 10 publications

(3 citation statements)

References 6 publications

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“…Hence, the mechanical properties of this weld would have high ductility, elasticity, malleability and low brittleness, resilience, and stiffness with the application of the developed flux and this is in consonant with the work reported in Ref. [15]. The hardness in the base metal, when nano-flux powder was used is 187.99 BHN, when imported flux was used it was 143.36 BHN and when no flux was used it was 206.21 BHN.…”

Section: Hardness Testsupporting

confidence: 86%

Performance Assessment of the Developed Flux Powder on the Tensile and Hardness Properties of Steels Joints Using TIG-Welding

Afolalu¹,

Ikumapayi²,

Ogedengbe³

et al. 2021

RCMA

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The conversion of waste to wealth has recently grossed high attention as it possesses the ability to boost the economy of any nation; hence, this research. In this study, the characterization and investigation of mechanical properties of nano- flux (CaO) welding powder developed from bio-agrowaste (eggshell) was carried out. Mild, galvanized and stainless steel of plates and rods were used as parent metals for the experiment. Results obtained from hardness test in the base metal, weld joint and heat affected zone for the galvanized and mild steel plates with nano-flux powder gave the best hardness of 111.95, 120.30, 182.99 and 206.21, 164.85, 110.56 BHN respectively. The tensile stress obtained both for mild and stainless steel was 88.14 MPa while the tensile strain obtained for both plates were 0.0155 mm/mm. Microstructural analysis results shows an improvement in the structure, surface and patterns of the weld with the use of developed flux compared with imported flux. Hence eggshells can be recycled and used for developing flux powder for welding processes.

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Section: Hardness Testsupporting

confidence: 86%

Performance Assessment of the Developed Flux Powder on the Tensile and Hardness Properties of Steels Joints Using TIG-Welding

Afolalu¹,

Ikumapayi²,

Ogedengbe³

et al. 2021

RCMA

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show abstract

“…2. In welding, pits are usually found at specific microstructural features in the weld deposit [9]. In comparison between 15% and 33% concentrations of NaCl for weld area, the image indicated similarity in surface morphologies under SEM.…”

Section: Surface Morphologies Weld Areamentioning

confidence: 91%

Corrosion Behavior of Steel Sleeve Joint in DifferentConcentration of Sodium Chloride (NaCl)

Sohami¹,

Mahmod²

2022

JAMEA

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A steel sleeve joint is a common way to fix a pipeline that has corroded, however even this type of repair is not immune to corrosion. To understand and increase the effectiveness of the steel sleeve joint, the corrosion behavior of the steel sleeve joint in various sodium chloride concentrations has been examined in this study. Carbon steel sleeve joints in weld and pipe areas were examined using a Scanning Electron Microscope (SEM) and Energy Dispersive Spectroscopy (EDS), which were utilized to determine the surface morphologies and element composition. The sample's parameters include sodium chloride concentrations of 15% and 33% and immersion times of 24, 48, and 72 hours. A Vickers hardness test is also done on the steel sleeve joint sample to compare the hardness of the weld and the pipe part. Results showed that the sample submerged in a 15% sodium chloride concentration corroded by more than 33%, and the corrosion product form increased with immersion time. The Vickers hardness number ranged from 216.4 to 284.8 HV for welds and 132.8 to 182.1 HV for pipe areas, respectively. The different values prove different corrosion behavior happen on both areas of the sample when compared by the results of surface morphologies and the Vickers hardness test.

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“…Calabrese et al [8] conducted long-term corrosion monitoring of steel bars in concrete through cluster analysis and denoising. Some scholars [9][10][11][12] employed the AE to monitor the mechanical performance of basic components, and probed deep into the AE features of reinforced concrete beams, plates and columns during the damage process. Their studies mainly focus on band energy features, Gutenberg-Richter parameter (b-value), macro/micro evolution, and Kaiser effect.…”

Section: Introductionmentioning

confidence: 99%

Monitoring and analysis of reinforced concrete plate-column structure under room temperature and fire based on acoustic emission

Wang

Dong

Zhang

et al. 2020

Frattura Ed Integrità Strutturale

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This paper attempts to disclose the damage mechanism of reinforced concrete plate-column structures under room temperature and fire. Several tests were carried out to record the law of crack development on the plate surface under room temperature. The infrared detection technology was adopted to observe how cracks develop under fire. The acoustic emission (AE) signals at different positions of the specimen were monitored by the AE techniques. Coupled with the macroscopic test phenomena, several characteristic parameters collected by the AE system, namely, cumulative number of events, event rate, energy rate and b-value, were analyzed in details. The results show that: the cumulative number of events was active in the loading, heating and cooling stages; the crack density and the change of internal forces could be derived from the trend of event rate; the local energy changes of the specimen could be deciphered from the curves of energy rate and b-value, making it possible to judge if a component has reached the failure state; the specimen suffered the most severe damage, when the AE parameters suddenly changed; AE monitoring enables the early warning of fire to reinforced concrete plate-column structure; infrared detection technology is suitable for real-time monitoring of crack development under high temperature.KEYWORDS. Plate-column structure; Acoustic emission (AE); Fire test; Cumulative number of events; Event rate; Energy rate; Gutenberg-Richter parameter (b-value).

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Investigation of Microstructure and Mechanical Properties of MIG Welded Mild Steel Plates

Cited by 10 publications

References 6 publications

Performance Assessment of the Developed Flux Powder on the Tensile and Hardness Properties of Steels Joints Using TIG-Welding

Performance Assessment of the Developed Flux Powder on the Tensile and Hardness Properties of Steels Joints Using TIG-Welding

Corrosion Behavior of Steel Sleeve Joint in DifferentConcentration of Sodium Chloride (NaCl)

Monitoring and analysis of reinforced concrete plate-column structure under room temperature and fire based on acoustic emission

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