|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||Thermal Fatigue Behavior of High Cr Roller Steel
||Goran Kugler, David Bombac, Milan Tercelj
|On-Site Speaker (Planned)
In this work thermal fatigue resistance of 1.7C, 11.2Cr, 2.0Ni, 1.2Mo steel for hot working rolls was studied using our newly developed test rig with specially prepared test samples. Tests were carried out in temperature range 500 - 700 °C whereas relevant characteristics related to cracks after 200, 500, 1000 and 2500 cycles were obtained. Average length of all cracks, their density, average length of five longest cracks and relevant microstructural characteristics of tested specimens were determined. It was found that initiation of cracks is strongly related to the cracking and spalling of carbides at specimen’s surface layer and that cracks growth is related to the characteristics of carbides. For comparison also results for Indefinite Chilled Double Poured roll cast iron are given. Based on obtained results, possible improvements of thermal fatigue resistance of these two materials are discussed.
||Planned: Supplemental Proceedings volume