Effect of Grain Boundary Character Distribution on the Impact Toughness of 410NiMo Weld Metal
IR@NML: CSIR-National Metallurgical Laboratory, Jamshedpur
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| Title |
Effect of Grain Boundary Character Distribution on the Impact Toughness of 410NiMo Weld Metal
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| Creator |
Divya, M
Das, C R Chowdhury, Sandip Ghosh Albert, S K Bhaduri, A K |
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| Subject |
Metal Working Processes
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| Description |
Grain boundary character distributions in 410NiMo weld metal were studied in the as-welded, first-stage, and second-stage postweld heat treatment (PWHT) conditions, and these were correlated with the Charpy-V impact toughness values of the material. The high impact toughness values in the weld metal in the as-welded and first-stage PWHT conditions compared to that in the second-stage condition are attributed to the higher fraction of low-energy I pound boundaries. A higher volume fraction of retained austenite and coarser martensite after second-stage PWHT accompanied by the formation of the ideal cube component in the 2-hour heat-treated specimen led to a reduction in the toughness value. A subsequent increase in the PWHT duration at 873 K (600 A degrees C) enhanced the formation of {111}aOE (c) 112 >, which impedes the adverse effect of the cubic component, resulting in an increase in the impact toughness. In addition to this, grain refinement during 4-hour PWHT in the second stage also increased the toughness of the weld metal.
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| Publisher |
SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
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| Date |
2016-07
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| Type |
Article
PeerReviewed |
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| Relation |
DOI: 10.1007/s11661-016-3481-z
http://eprints.nmlindia.org/7597/ |
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| Identifier |
Divya, M and Das, C R and Chowdhury, Sandip Ghosh and Albert, S K and Bhaduri, A K (2016) Effect of Grain Boundary Character Distribution on the Impact Toughness of 410NiMo Weld Metal. Metallurgical and Materials Transactions A-Physical Metallurgy and MaterialsScience, 47A/7 (IF-1.749). pp. 3397-3411.
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