Mechanical And Thermal Properties Of Pure Nickel As An Alternative Automotive Body Material

Gan, Bee Geok (2010) Mechanical And Thermal Properties Of Pure Nickel As An Alternative Automotive Body Material. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This project is represented the study of thermal and mechanical properties of pure nickel as an alternative automotive body material. Nickel is the chemical element which categorized in periodic table as transition metal. Nickel is a hard, malleable, ductile material. It is used for making stainless steel, low alloy steels, cast iron and etc. Nickel also used in battery manufacturing. Current automotive are mainly use steel as an automotive body material. Due to the increasing demand of high performance in term of mechanical properties of the material use in automotive, researched have been done to find alternative material to replace steel. In this project, annealing is done for pure nickel at 300 ºC, 500 ºC and 700ºC for 1 hour. The studies on mechanical properties, corrosion test, composition analysis and crystallography analysis in different annealing temperatures to alternate current automotive body material. The hardness of both non - heat treated and annealed pure nickels do not change as the annealing temperature increases which in the range of 118 to 123 HV. As the annealed temperature increase, the ultimate tensile strength, yield strength and young modulus decreases, but the ductility increase. The highest ultimate tensile strength of pure nickel at 300ºC annealed temperature which is 758.78 MPa. For corrosion test, the corrosion rate of both non-heat treated and annealed pure nickel have minor changes with the annealed temperature which in the range of 0.0266 to 0.048 mm/year. The composition of both non- heat treated and annealed pure nickels do not change. Pure nickel is face center cubic structure; the lattice constant is decreasing as the annealing temperature increases. Besides, the grain size of pure nickel is increasing as the annealed temperature increase.

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