Cementite dissolution in cold drawn pearlitic steel wires: role of dislocations

Chakraborty, J and Maiti, Tias and Ghosh, M and Das, Goutam and Chandra, Sanjay (2014) Cementite dissolution in cold drawn pearlitic steel wires: role of dislocations. International Confrence on Residual Stresses 9 (ICRS9), 768-769 . pp. 304-312.

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Despite numerous investigations in the past, mechanism of cementite dissolution has still remained a matter of debate. The present work investigates cementite dissolution during cold wire drawing of pearlitic steel (similar to 0.8wt% carbon) at medium drawing strain (up to true strain 1.4) and the role of dislocations in the ferrite matrix on the dissolution process. Quantitative phase analysis using X-ray diffraction (XRD) confirms more than 50% dissolution of cementite phase at drawing strain similar to 1.4. Detailed analysis of the broadening of ferrite diffraction lines confirms presence of strain anisotropy in ferrite due to high density of dislocations (similar to 10(15)m(-2)) at drawing strain 1.4. The results of the analysis shows that the screw dislocations near the ferrite-cementite interface are predominantly responsible for pulling the carbon atoms out of the cementite phase leading to its dissolution

Item Type:Article
Official URL/DOI:http://eprints.nmlindia.org/6955
Uncontrolled Keywords:Pearlitic steel; ferrite; cementite; X-ray diffraction; dislocations
Divisions:Material Science and Technology
ID Code:6955
Deposited By:Sahu A K
Deposited On:12 Jul 2014 07:48
Last Modified:04 May 2016 12:57
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