The structure and properties of a thermo-mechanically processed low carbon high strength steel

Ghosh, Arindam and Shukla, R and Das, S and Chatterjee, S (2006) The structure and properties of a thermo-mechanically processed low carbon high strength steel. Steel Research International , 77 (4). pp. 276-283.

Restricted to NML users only. Others may use ->



Research efforts were given towards development of low carbon high strength steels since recent past. The present study deals with the development of a low carbon high strength steel alloyed with Mn, Ni, Mo, Cu and microalloyed with Ti and Nb. The steel was subjected to three stage controlled rolling operation followed by accelerated cooling. The structure and properties of the steel at various processing conditions were evaluated. Microstructural observation reveals predominantly lath martensite along with twinned martensite structure at all processing conditions. High strength values at higher finish rolling temperatures have been obtained due to fine martensitic structure along with tiny precipitates of microalloying carbide and carbonitride. The strength value increases marginally at lower finishing temperature due to comparatively finer lath size of martensite and increased precipitation density of carbides, carbonitrides along with Cu particles. The variation in impact toughness properties at different finish rolling temperatures is found to be negligible at ambient and subambient temperatures. The formation of stable and large TiN/TiCN particles during casting have impaired the impact toughness values at ambient and at -40 degrees C temperatures.

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:high strength steel; thermo-mechanical processing; twinned martensite; microalloying precipitate; toughness
Divisions:Material Science and Technology
ID Code:3363
Deposited By:Sahu A K
Deposited On:18 Jul 2011 11:53
Last Modified:19 Sep 2014 16:36
Related URLs:

Repository Staff Only: item control page