Abstract
Strain hardening behaviour has significant effect on altering the properties of materials. In the present study, Al–ZrB2 metal matrix composites are made through powder metallurgy route. Incremental weight percentage (wt%) of ZrB2 (0, 2, 4 and 6 wt%) are added to Aluminium matrix to produce different composites. The homogenous powder mixture is compacted and pressurelessly sintered. Sintering of composites is performed over a range of 450–575 °C. The optimized sintered condition is observed at 550 °C for 1 h in controlled atmosphere (argon gas flow). The sintered compacts are strained in incremental steps in different levels up to failure. A visible crack on the bulge of the powder preform is considered as the failure. Composites are strain hardened up to failure. To evaluate the effect of temperature on strain hardening, strain hardening is carried out at different temperatures. Composites are densified with the extent of straining and hardness increases with the increase of strain. Hardness increase with the increase in temperature is maintained during strain hardening. To evaluate the corrosion behaviour of Al–ZrB2 composite, potentiodynamic polarization study are performed on the strained composites. Corrosion rate decrease with the extent of straining.
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The authors would like to thank Metallurgical and Materials Engineering Department, NIT Warangal which helped in characterization of composites.
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Kaku, S.M.Y., Khanra, A.K. & Davidson, M.J. Strain Hardening Behaviour and Its Effect on Properties of ZrB2 Reinforced Al Composite Prepared by Powder Metallurgy Technique. J. Inst. Eng. India Ser. D 99, 115–124 (2018). https://doi.org/10.1007/s40033-018-0155-6
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DOI: https://doi.org/10.1007/s40033-018-0155-6