Study on the relationship between tensile and hardness properties on several metallic materials
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Date
2018-06
Authors
Nur Husna Ahmad
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Abstract
In this work, the tensile and hardness properties were investigated on the several metallic
materials such as aluminium, copper and galvanize steel. The main objective in this
research is to study the relationship between the tensile and hardness properties on several
metallic materials with the help of microstructures observation and regression analysis
for interpretation of the data. Besides, the measurement uncertainty also conducted to
determine the validation of the data. INSTRON 5965 and Vickers hardness machine were
used to determine the correlation between the hardness and strength of the materials.
Besides, iSolution software with the optical microscope also was used in observing the
microstructure. It was found that the actual correlation between hardness and strength for
aluminium, copper and galvanize steel are in the range 2.94 - 2.95 for aluminium, 2.76 -
2.77 for copper and lastly 2.78 – 3.13 for galvanize steel. However, the measurement
uncertainty help to validate the correlation between hardness and strength. From the
measurement uncertainty calculation, the value for yield strength and ultimate tensile
strength for copper, aluminium and galvanize steel are 2.69 and 2.75; 7.60 and 7.80; 17.05
and 17.13 respectively. Aluminium had the fine grain compared to galvanized steel.
However, the strength of aluminium is lower than galvanize steel and copper.