ABSTRACT
This study has evaluated the effectiveness of metallic materials as chill in sand casting of aluminium alloy. Four plates of dimension 165mm x 80mm x10mm were cast using sand mould. Steel, copper and brass chills in form of cylindrical bar of geometry 7mm in diameter and 50mm long were inserted, side by side at regular intervals of 30mm in each sand mould and the last sample was left unchilled. Experimentation involved testing of mechanical properties and metallographic analysis of cast samples. The results obtained revealed that the sample chilled with copper has the highest mechanical properties (ultimate tensile strength of 126.13MPa, hardness of 6.8Hv and impact strength of 23.5J).Also sample chilled with copper revealed evenly distributed microstructure which is due to the fast solidification rate of the casting due to the high thermal conductivity of copper. The brass chill sample displayed better mechanical properties (ultimate tensile strength of 115.8MPa, hardness of 5.7Hv and impact strength of 22.4J) than sample chilled with steel (ultimate tensile strength of 101.33MPa and hardness of 5.4Hv). However, the unchilled sample showed the lowest ultimate tensile strength of 70.67MPa, hardness of 4.2Hv and impact strength of 22.5J.
THE INFLUENCE OF INFORMATION SYSTEMS ON BUSINESS INNOVATION
Abstract: This study aimed to investi...
ABSTRACT
This study was intended to evaluate the impact of pricing on profitability level of an organization. This study...
Abstract: THE INFLUENCE OF DATA PROTECTION POLICIES ON BUSINESS OPERATIONS
This study...
Abstract
This research work examined the impact of radio on voters mobilization with Enugu North municipality as a case study. The survey...
ABSTRACT
This study is designed to identify the role of Youth organizations participation in community development proje...
Nutritional knowledge has been proven to play a very vital role in adopting optimal nutrition practices in the health of every expectant mother.As...
ABSTRACT
Both Airborne Magnetic and Radiometric dataset were employed to interpret the geology and geological structures that serve as ho...
ABSTRACT
This study title ―Effect of Inquiry Teaching Method on Social Studies Students‘ Attitude and Academic Performance in Katsi...
ABSTRACT
The purpose of the research is to determine the impact of Technology Based Self-Service Banking (TBSSB) on customers’ sati...
Background Of Study
The current economic crisis that has hit the Nigerian nation has been so severe tha...