Effect of Grain Boundary Character Distribution on the Impact Toughness of 410NiMo Weld Metal

Divya, M and Das, C R and Ghosh Chowdhury, S 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 Materials Science, 47A(7) (IF-1.874). pp. 3397-3411.

Full text not available from this repository.


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.

Item Type:Article
Official URL/DOI:https://link.springer.com/article/10.1007/s11661-0...
Uncontrolled Keywords:Martensitic Stainless-Steels; Mechanical-Properties; Lath Martensite; Trip Steels; Austenite; Behavior; Recrystallization; Microstructures; Deformation; Diffraction
Divisions:Metal Extraction and Forming
ID Code:7526
Deposited By:Sahu A K
Deposited On:14 Aug 2017 13:40
Last Modified:30 Sep 2019 14:09
Related URLs:

Repository Staff Only: item control page