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Cu precipitation on dislocation and interface in quench-aged steel

Published online by Cambridge University Press:  11 September 2012

Qingdong Liu  and
Shijin Zhao
Qingdong Liu*
Affiliation:
Key Laboratory of Microstructures and Institute of Materials, Shanghai University, Shanghai 200072, P.R. China
Shijin Zhao
Affiliation:
Key Laboratory of Microstructures and Institute of Materials, Shanghai University, Shanghai 200072, P.R. China
*
* Address all correspondence to Qingdong Liu at qdliu@shu.edu.cn
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Abstract

The Cu precipitation in a quench-aged high-strength low-alloy steel is studied at the atomic scale by atom probe tomography and high-resolution transmission electron microscopy. The results indicate that the Cu precipitates greatly correlate with carbides in the aspect of distributional character, i.e., the two phases are prone to coprecipitate on the dislocations and/or interfaces (low angle boundaries of the martensite laths). The crystallographic defects have a significant effect on the sizes, morphology and composition of Cu precipitates with Ni and Mn segregation shell.

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Type
Research Letters
Information
MRS Communications , Volume 2 , Issue 4 , December 2012 , pp. 127 - 132
Copyright
Copyright © Materials Research Society 2012

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