Dissolution of Cementite in Carbon Steels by Heavy Deformation and Laser Heat Treatment
| Periodical | Materials Science Forum (Volumes 503 - 504) |
|---|---|
| Main Theme | Nanomaterials by Severe Plastic Deformation |
| Edited by | Zenji Horita |
| Pages | 461-468 |
| DOI | 10.4028/www.scientific.net/MSF.503-504.461 |
| Citation | Minoru Umemoto et al., 2006, Materials Science Forum, 503-504, 461 |
| Online since | January, 2006 |
| Authors | Minoru Umemoto, Yoshikazu Todaka, Akifumi Ohno, Mayumi Suzuki, Koichi Tsuchiya |
| Keywords | Cementite, Characterization, Deformation, Dissolution, Mechanical Property, Pearlite |
| Price | US$ 28,- |
Dissolution behavior of cementite in eutectoid steels with pearlitic and spheroidite structures by severe plastic deformation was studied. Applying a long time milling, cementite dissolved completely and matrix turned out to be nanocrystalline ferrite. By a ball drop deformation (at high strain rates), heavily deformed layers in which cementite dissolves completely or partially were produced. By applying pulsed laser irradiation, re-austenitized zone which transformed to fresh martensite during quenching was produced. The boundary between the re-austenitized zone and matrix exhibited similar microstructure with that observed in specimens subjected to a ball drop deformation. It was suggested that the dissolution of cementite by heavy deformation at high strain rates are probably due to thermal effect, that is, re-austenitization.
