Red mud emerges as the major waste material during production of alumina from bauxite by the Bayer’s process. It comprises of oxides of iron, titanium, aluminum and silica along with some other minor constituents. Based on economics as well as environmental related issues, enormous efforts have been directed worldwide towards red mud management issues i.e. of utilization, storage and disposal. Different avenues of red mud utilization are more or less known but none of them have so far proved to be economically viable or commercially feasible. It is generally agreed that resistance to wear of MMCs is created by reinforcement and also the wear properties are improved remarkably by introducing hard intermetallic compound into the aluminium matrix. The reinforcing materials are generally SiC, Al2O3, TiB2 etc and are costly. The present research work has been undertaken with an objective to explore the use of red mud as a reinforcing material as a low cost option. This is due to...

Red Mud

Bayer process

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Fresh Martensite Formation from Reversed Austenite Phase in Medium Manganese Steel During Intercritical Annealing

Transylvanian Review (2016)

Priydarshan Mahana Naresh Prasad J. Mohanty

The aim of the present study was to study the changes of micro-structural behavior of medium manganese steel during intercritical annealing. During the process, it was observed that the microstructure gradually evolved from austenite structure into martensite. The retained austenite volume fraction reached the maximum value of 35% at 650 o C annealing temperature. From SEM and TEM results, it was found that reversed austenite partly changed into fresh martensite during quenching while the remained part was retained as retained austenite. The final structure consisted of ferrite, retained austenite and fresh martensite.

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