Significant Effect Of Galvanneal Metal Sheet To The Quality Of Spot Welding

Ab Rahim, Muhammad Saiful Ridzwan (2016) Significant Effect Of Galvanneal Metal Sheet To The Quality Of Spot Welding. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) Significant Effect Of Galvanneal Metal Sheet To The Quality Of Spot Welding.pdf - Submitted Version Download (625kB)

Abstract

In automotive industry, crashworthiness refers to the capability of a car structure to provide adequate protection to passengers against injuries when crash happen. Mostly, car structure depends on the spot weld quality and mechanical characteristic behaviour. Therefore, the result of spot welds significantly affects the safety of the vehicles and effect of Galvaneal metal sheet has been studied. The experimental processes that has been done is Hardness test (Rockwell) and Tensile test (Shimadzu Universal Testing Machine). The samples were divided into two class parameters. The result for two class parameter is absolutely different. From the experiment, the size of nugget for Galvanneal metal sheet is 4.9mm meanwhile for rework sample is 4.6mm. The result of hardness show that the Galvanneal sample is hard than rework sample. The result was analysed and it show the parameter class B give the highest strength tensile, nugget size and optimum parameter compare to parameter A . The properties that have been produced at the fusion zone after process spot welding is also proved by studying the microstructure of the division. From the study, microstructure at fusion zone for Parameter B shows that the entire area is filled with martensite and austenite. This microstructure has elastic properties and high hard, parallel to the mechanical tests that have been carried out.

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