Abstract
Multi directional forging (MDF) is a process of severe plastic deformation used to produce fine grained bulk materials. In the present study, 7050 Aluminium alloy is used due to its wider applications in the field of aerospace industry particularly for making blade stringers. During experimentation, As-cast alloy samples were subjected to solutionizing heat treatment at 400 °C for 20 h to remove segregation effects and undergone multidirectional forging at ambient warmth for different equivalent strains. The mechanical properties such as Vickers’s hardness and compression tests were done on processed and unprocessed samples. The microstructural characterization was done using optical microscopy. It was observed that initial compression strength was increased from 505 MPa to 586 MPa and hardness was increased from 141 Vickers hardness number (VHN) to 182 Vickers hardness number (VHN) due to refinement of grains from 60 µm to 10 µm. It was found that solutionizing heat treatment reduces the defects like porosity which was developed during casting process. In the present work, more emphasis is given on the improvement of mechanical properties and microstructure of as-cast alloys that are multi-directionally forged.
Published Version
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