Cementite dissolution in cold drawn pearlitic steel wires: role of dislocations
IR@NML: CSIR-National Metallurgical Laboratory, Jamshedpur
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| Title |
Cementite dissolution in cold drawn pearlitic steel wires: role of dislocations
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| Creator |
Chakraborty, J
Maiti, Tias Ghosh, M Das, Goutam Chandra, Sanjay |
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| Subject |
Materials Science
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| Description |
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
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| Publisher |
TRANS TECH PUBLICATIONS LTD, LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
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| Date |
2014
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| Type |
Conference or Workshop Item
PeerReviewed |
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| Relation |
http://eprints.nmlindia.org/6955
http://eprints.nmlindia.org/6955/ |
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| Identifier |
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. In: UNSPECIFIED.
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