Phase Transformations in Carbon Steel Powders Subjected to Ball Milling

Dariusz Oleszak; A. Janczewski; Agnieszka Grabias

doi:10.4028/www.scientific.net/SSP.101-102.165

Paper Titles

Al₂O₃-Fe Functionally Graded Materials Fabricated under Magnetic Field
p.143

Influence of Temperature and Pressure on the Possibility of Obtaining Al₂O₃/Ni-P Nanocomposite through Hot Pressing Process
p.147

Investigation of the Microstructure of SiC-Zn Nanocomposites by Microscopic Methods: SEM, AFM and TEM
p.151

Synthesis of Metal-Ceramic Nanocomposites by High-Pressure Infiltration
p.157

Phase Transformations in Carbon Steel Powders Subjected to Ball Milling
p.165

Grain Boundary Microstructural Control in Nanocrystalline Ni and Ni-20mass%Fe Alloy by Magnetic Annealing
p.171

Nanomaterials Produced by Ablation and Pulsed Laser Deposition
p.181

Physics of Growth of Thin Films Deposited by Laser Ablation
p.187

Nanocrystalline Thermoelectric Alloys: Processing, Chemistry and Characterization
p.197

HomeSolid State PhenomenaSolid State Phenomena Vols. 101-102Phase Transformations in Carbon Steel Powders...

Phase Transformations in Carbon Steel Powders Subjected to Ball Milling

Abstract:

The tool carbon steel powder, containing 1.1 % C, was subjected to heavy cold working by ball milling in a Fritsch P5 planetary ball mill. XRD studies showed that ball milling results in a dissolution of cementite and formation of nanoferrite. The crystallite size and lattice strain of ferrite, calculated by applying Williamson-Hall method, were 10 nm and 1%, respectively. Mössbauer spectroscopy measurements confirmed the formation of a phase called “distorted ferrite”, characterized by the values of hyperfine field of 28.5 T and isomer shift of 0.15 mm/s, different from ones of ferrite (32.9 T and 0.00 mm/s, respectively). DSC investigations revealed two heat effects recorded during heating the sample after 100 h of ball milling: exothermic effect at 360oC and endothermic one at 580oC. The first one was attributed to the dramatic decreasing of lattice strain (from 1% after milling down to 0.1%, as showed XRD studies) and slightly increasing of crystallite size (from 10 to 25 nm).The formation of Fe3C was not observed in this temperature and the structure of nanoferrite was preserved. The second observed heat effect was reversible and probably related to the eutectoid transformation, shifted by ball milling to lower temperature range, comparing to equilibrium conditions.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Solid State Phenomena (Volumes 101-102)

Pages:

165-170

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.101-102.165

Citation:

Cite this paper

Online since:

January 2005

Authors:

Dariusz Oleszak, A. Janczewski, Agnieszka Grabias

Keywords:

Ball Milling, Cementite, Ferrite, Mössbauer Spectroscopy CEMS, Phase Transformation, Steel Powders

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] Z.G. Liu, X.J. Hao, K. Masuyama, K. Tsuchiya, M. Umemoto: Scripta Mater. Vol. 44 (2001) pp.1775-1779.

DOI: 10.1016/s1359-6462(01)00739-4

Google Scholar

[2] M. Umemoto, Z.G. Liu, Y. Xu, K. Tsuchiya: Mater. Sci. Forum Vol. 386-388 (2002) pp.323-328.

Google Scholar

[3] G.K. Williamson, W.H. Hall: Acta Metallurgica Vol. 1 (1953) pp.22-31.

Google Scholar

[4] V.G. Gavriljuk: Mat. Sci. Eng. Vol. A 345 (2003) pp.81-89 Fig. 4. The DSC curve recorded for the sample after 100 h of ball milling. 100 200 300 400 500 600 700 720oC 410oC 310oC 360oC 100 h BM exo Heat Flow [a. u. ] Tem perature [oC].

Google Scholar