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Bupesh Raja, V. K.
- Experimental Investigation for Characterization of Formability of Epoxy based Fiber Metal Laminates using Erichsen Cupping Test Method
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Authors
Affiliations
1 Department of Mechanical Engineering, Sathyabama University, Chennai-600119, Tamil Nadu, IN
2 Department of Automobile Engineering, Sathyabama University, Chennai-600119, Tamil Nadu, IN
3 Department of Mechanical Engineering, Vel Tech University, Chennai-600062, Tamil Nadu, IN
1 Department of Mechanical Engineering, Sathyabama University, Chennai-600119, Tamil Nadu, IN
2 Department of Automobile Engineering, Sathyabama University, Chennai-600119, Tamil Nadu, IN
3 Department of Mechanical Engineering, Vel Tech University, Chennai-600062, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 8, No 33 (2015), Pagination:Abstract
Fiber Metal Laminates are now-a-days a dominant material for applications such as automobile body panels, aircrafts cabins and railway wagons, because of reasons such as superior mechanical properties such as high strength and less weight. Hand Lay-up technique was used to fabricate four fiber metals laminates comprising of aluminium alloy 5052-H32 as the skin material and E-glass fiber as the core. The formability behavior of the laminate was found using Erichsen cupping test using an indigenously developed test setup. The Erichsen cupping index on the specimen varied from 5.95 to 7.28 respectively. The test specimens were investigated through microscope and macroscopic approach. Macroscopic examination revealed that the laminate was ductile in nature, which was backed by the aluminium skin. The defect created on the specimen during the test was smaller than the diameter of the ball used during the test. Microscopic examination through Scanning Electron Microscope revealed that the laminates had microscopic defects such as fiber pullout and surface cracks in the skin materials. The fibers were subjected to brittle failure while the skin material sustained ductile fractures. The Erichsen cupping index value depended upon the factors such as complexity of composite sheet forming operations, simple mechanical property measurements made from the tension test area of tested value. Ductile fracture was observed in the specimen due to the influence of progressive loading through Erichsen cupping test. There was non-uniform distribution of reinforcement in material, Microstructure revealed fiber cracks which were oriented in line to the crack growth on the skin material. Hence, it can be concluded that the proposed material can be safely applied for automotive, aeronautical and locomotive body panels or as a skin material.Keywords
Erichsen Cupping Index, Erichsen Cupping Test, Fiber Metal Laminate, Formability Behavior- Experimental Investigation of DSS/HRS GTAW Weldments
Abstract Views :136 |
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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 :179 |
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