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Jabaraj, D. B.
- Experimental Investigation of DSS/HRS GTAW Weldments
Abstract Views :135 |
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Authors
Affiliations
1 Department of Mechanical Engineering, St Peters University, Avadi, Chennai - 600054, IN
2 Department of Mechanical Engineering, Dr. MGR Educational and Research Institute University, Chennai - 600095, IN
3 Department of Automobile Engineering, Sathyabama University, Chennai - 600119, IN
1 Department of Mechanical Engineering, St Peters University, Avadi, Chennai - 600054, IN
2 Department of Mechanical Engineering, Dr. MGR Educational and Research Institute University, Chennai - 600095, IN
3 Department of Automobile Engineering, Sathyabama University, Chennai - 600119, IN
Source
Indian Journal of Science and Technology, Vol 9, No 43 (2016), Pagination:Abstract
Objectives: The Gas Tungsten Arc Welding (GTAW) of blanks 2 mm thick of Duplex Stainless Steel (DSS) and Hot Rolled Medium and High Tensile Structural Steel (HRS) is carried out to investigate the metallurgical, mechanical properties and the fracture. Methods: The characterization of the weldments involves tests, viz. macrostructure, microstructure, micro composition analysis through Energy Dispersive Analysis of X ray (EDAX) to find out the metallurgical properties and micro hardness test, tensile test, bend test to determine the mechanical properties of the weldments. Topography of tensile test fractured specimens was analyzed with the help of Scanning Electron Microscope (SEM) and determines the influence of the welding on the ductility of the weld material. Findings: The increase in the weld zone micro hardness and formation of dendritic delta ferrite microstructure, when compared with the DSS parent metal having elongated grained austenite with ferrite and the HRS parent metal having fine grains of ferrite, caused the joint efficiency of the DSS/HRS weldment to increase. The Energy Dispersive Analysis of X ray (EDAX) indicates the formation of dendritic delta ferrite microstructure is attributed to the presence of elements like Si and Cr. The SEM fractography analysis indicates that the weldments possess good tensile strength without decrease in ductility of the fusion zone. Applications: Experimental investigation of mechanical properties and microstructure of DSS-HRS dissimilar GTAW weld joints and fracture analysis with EDAX to identify the changes in the chemical compositions of the fractured specimen.Keywords
Duplex Stainless Steel, GTAW, Hot Rolled Steel, Mechanical Properties, Microstructure.- Mechanical Properties and Phase Transformations in Resistance Spot Welded Dissimilar Joints of AISI409M/AISI301 Steel
Abstract Views :176 |
PDF Views:0
Authors
Affiliations
1 Department of Mechanical Engineering, St Peters University, Avadi, Chennai - 600054, Tamil Nadu, IN
2 Dr MGR Educational and Research Institute University, Chennai - 600095, Tamil Nadu, IN
3 Department of Mechanical Engineering, Dr MGR Educational and Research Institute University, Chennai - 600095, Tamil Nadu, IN
4 Department of Automobile Engineering, Sathyabama University, Chennai - 600119, Tamil Nadu, IN
1 Department of Mechanical Engineering, St Peters University, Avadi, Chennai - 600054, Tamil Nadu, IN
2 Dr MGR Educational and Research Institute University, Chennai - 600095, Tamil Nadu, IN
3 Department of Mechanical Engineering, Dr MGR Educational and Research Institute University, Chennai - 600095, Tamil Nadu, IN
4 Department of Automobile Engineering, Sathyabama University, Chennai - 600119, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 42 (2016), Pagination:Abstract
Objectives: This study aims to investigate the mechanical properties and phase transformations in dissimilar metal joints between AISI 301 Austenitic Stainless Steel and AISI 409M Ferritic Stainless Steel, joined by resistance spot welding. Methods/Analysis: Mechanical properties such as tensile shear strength, failure energy, failure mode, nugget size and surface indentation were analysed at varying current ratings. Macrostructure was examined for size and shape. Microstructure at various locations such as, fusion zone and heat affected zones were investigated. Micro hardness measurement was done at various locations along the weld. Findings: Peak load incremented progressively with rise in welding current, till the commencement of severe expulsion. Weld zone hardness showed a higher value than that of nearby heat affected zones and parent metals. Increment in welding current resulted in enlargement of weld nugget and rise in energy absorption capacity. Electrode indentation values were seen to be correlated with welding current values positively. Fusion zone microstructure consists of marten site and ferrite. Asymmetrical nugget shape was observed. Novelty/Improvement: This study explores the properties, both mechanical and microstructure of AISI 409M-AISI 301 steel dissimilar joint, joined by resistance spot welding.Keywords
AISI301, AISI409M, Failure mode, Microstructure, Peak load.- Mechanical Properties and Phase Transformations in Resistance Spot Welded Dissimilar Joints of AISI409M/AISI301 Steel
Abstract Views :133 |
PDF Views:0
Authors
Affiliations
1 Department of Mechanical Engineering, St Peters University, Avadi, Chennai- 600054, Tamil Nadu, IN
2 Dr MGR Educational and Research Institute University, Chennai - 600095, Tamil Nadu, IN
3 Department of Mechanical Engineering, Dr MGR Educational and Research Institute University, Chennai - 600095, Tamil Nadu, IN
4 Department of Automobile Engineering, Sathyabama University, Chennai - 600119, Tamil Nadu, IN
1 Department of Mechanical Engineering, St Peters University, Avadi, Chennai- 600054, Tamil Nadu, IN
2 Dr MGR Educational and Research Institute University, Chennai - 600095, Tamil Nadu, IN
3 Department of Mechanical Engineering, Dr MGR Educational and Research Institute University, Chennai - 600095, Tamil Nadu, IN
4 Department of Automobile Engineering, Sathyabama University, Chennai - 600119, Tamil Nadu, IN