Paper Title:
Dissolution of Cementite in Carbon Steels by Heavy Deformation and Laser Heat Treatment
  Abstract

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.

  Info
Periodical
Materials Science Forum (Volumes 503-504)
Edited by
Zenji Horita
Pages
461-468
DOI
10.4028/www.scientific.net/MSF.503-504.461
Citation
M. Umemoto, Y. Todaka, A. Ohno, M. Suzuki, K. Tsuchiya, "Dissolution of Cementite in Carbon Steels by Heavy Deformation and Laser Heat Treatment", Materials Science Forum, Vols. 503-504, pp. 461-468, 2006
Online since
January 2006
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Price
$32.00
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