Mechanical And Thermal Properties Of Intermetallic Ni5Al3 For Automotive Body Applications

Lim, Kok Chin (2010) Mechanical And Thermal Properties Of Intermetallic Ni5Al3 For Automotive Body Applications. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Intermetallic alloy Ni5Al3 is known for its good magnetic and thermal properties as the candidate materials for thermistor applications. A research work on their mechanical and thermal properties study give a better understanding of this system in automotive bodies’ materials. Hardness and corrosion testing were carried out to determine the surface hardness and corrosion rate of Ni5Al3. There are one non-heat treated and three annealing samples prepared for each test. The annealing temperatures are 300oC, 500oC, and 700oC respectively. The thermal effects on the hardness value and corrosion rate were interpreted. Then, the experimental results were analyzed and compared to the current automobile bodies’ materials. Besides, XRD and EDX inspection were done to mainly investigate the composition of Ni and Al in this alloy. Ni5Al3 is estimated to have hardness of approximately 400 HV and corrosion rate ranging from 5.0 to 30 x 10- 3 mm/yr, thus expected to be a qualified material for replacing current automobile bodies’ materials.

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