1Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirappalli - 620 015, Tamil Nadu, India
2Maulana Azad National Institute of Technology, Bhopal - 462 007, Madhya Pradesh, India
3Department of Civil Engineering, National Institute of Technology, Tiruchirappalli, 620 015, Tamil Nadu, India
4Department of Mechanical Engineering, National Institute of Technology, Tiruchirappalli - 620 015, Tamil Nadu, India
Present investigation pertains to studying the effect of fractional theoretical density and heights-to-diameter ratio on radial crushing strength for sintered-hot deformed Fe-0.8%C powder metallurgy ring preforms. In addition, an effect of 1.0% molybdenum addition in eutectoid steel ring preforms is highlighted. Rings of predetermined geometry were machined from the hot deformed preforms of different initial densities. It has been found that increasing initial density of the preform increases the radial crushing strength irrespective of preform geometry and compositions. Further, it has been observed that the hardness values are continuously increasing with increasing fractional theoretical density, also increasing height to diameter ratio substantially increases the hardness values for any theoretical density attained. It is also observed from fractographs that majority of the rings crushed in a highly brittle manner.
Radial crushing strength, Fractional theoretical density, Hardness, Fractograph
