In order to suppress global warming, it is necessary reduce the weight of autobodies, whereas improvement collision safety automobiles required which results in a increase. Research and development high-strength steel sheets for autobodies are being carried out achieve both two objectives. Among various sheets, low alloy steels utilizing transformation-induced plasticity retained austenite (TRI...

This work is to the best of my knowledge original, except where acknowledgements and references are made to previous work. Neither this, nor any substantially similar dissertation has been or is being submitted for any other degree, diploma or other qualification at any other university. This dissertation does not exceed 60,000 words in length. Abstract iii DFT Pak, Jun Hak 20080959 Coalesced s...