Investigation of Lath and Plate Martensite in a Carbon Steel
| Periodical | Solid State Phenomena (Volumes 172 - 174) |
|---|---|
| Main Theme | Solid-Solid Phase Transformations in Inorganic Materials |
| Edited by | Yves Bréchet, Emmanuel Clouet, Alexis Deschamps, Alphonse Finel and Frédéric Soisson |
| Pages | 61-66 |
| DOI | 10.4028/www.scientific.net/SSP.172-174.61 |
| Citation | Albin Stormvinter et al., 2011, Solid State Phenomena, 172-174, 61 |
| Online since | June, 2011 |
| Authors | Albin Stormvinter, Annika Borgenstam, Peter Hedström |
| Keywords | Carbon Steel, Lath Martensite, Microstructure, Plate Martensite |
| Price | US$ 28,- |
Martensite in carbon steels forms in different morphologies, often referred to as lath andplate martensite. The alloy composition has a strong effect on the morphology, for instance in car-bon steels there is a morphological change of the martensite microstructure from lath martensite atlow carbon contents to plate martensite at high carbon contents. In the present work a decarburizedhigh-carbon steel, enabling the isolation of carbons' influence alone, has been studied in order to in-vestigate the changes in morphology and hardness. From the results it is concluded that there is acontinuous change of hardness with increased carbon content. The increasing hardness slows down atabout 0.6 wt%C before decreasing at higher carbon contents. This is in accordance with the change inmorphology since it was found that lath martensite dominates below 0.6 wt%C and the first units ofgrain boundary martensite and plate martensite appear above 0.6 wt%C. At high carbon contents thedominating morphology is plate martensite, but retained austenite is also present.
