Analysis of mechanical properties and microstructure of multiple die cavity products produced in vertical and horizontal arrangement by gravity die casting

Elfallah, Saleh S Saleh (2012) Analysis of mechanical properties and microstructure of multiple die cavity products produced in vertical and horizontal arrangement by gravity die casting. Masters thesis, Universiti Tun Hussein Onn Malaysia.

[img]PDF
1322Kb

Abstract

Multiple cavities die casting (Permanent die casting) in vertical arrangement and horizontal arrangement moulds are widely used in industry. However, manufacturers assume that each product produced in either arrangement would have the same quality. Manufacturers do not have enough information about the properties of each product, i.e. strength, internal defect and the microstructure. Furthermore, in actuality the quality of each product might be affected. It is the problem that we found within the market now (pinholes, cracks, misruns and etc.), that is the reason investigation and comparison of the multi product in vertical and horizontal arrangement is needed. This investigation is needed to choose which arrangement is preferred to maintain the quality of the product. The methodology used are vickers microhardness test, izod test, ensile test, density and porosity test and optical microscope inspection for all produced sample. Results of this research show that castings produced at vertical arrangement mould have higher mechanical and properties than castings produced in horizontal arrangement mould. Vertical arrangement castings obtained higher density exceeds %1.6117 than horizontal arrangement castings that ranges between (1.156 and 4.8707 percent). However, vertical arrangement castings obtained higher porosity exceeds %13.3885 than horizontal arrangement castings that ranges between (0.0809 and 7.4629 percent). The hardness values for vertical castings ranges between (115HV and 78.9HV), while ranges between (110HV and 79.1HV) for horizontal castings. Castings in vertical arrangement hardness are %7.5442 higher than hardness for castings in horizontal arrangement. Impact strength values of vertical arrangement casting impact values that ranges between( 6J and 19J ) positions are %118.4615 higher than casting at horizontal arrangement casting positions that range between (2J and 11J). Ultimate tensile strength for castings produced at vertical arrangement mould ranges between (122-182 MPa) are %11.81 higher than castings produced at horizontal arrangement castings (101-178 MPa). The microporosity at vertical arrangement positions are %35 lower than microporoity at horizontal arrangement positions.

Item Type:Thesis (Masters)
Subjects:T Technology > TS Manufactures > TS200-770 Metal manufactures. Metalworking
ID Code:3670
Deposited By:Normajihan Abd. Rahman
Deposited On:23 Jun 2016 14:54
Last Modified:23 Jun 2016 14:54

Repository Staff Only: item control page