Paper Title:
Effect of Oxygen Content on Toughness in High Strength Weld Metal
  Abstract

The effect of oxygen content on toughness in the high strength weld metals with full martensitic microstructures was investigated for Gas Metal Arc Welding (GMAW) and Gas Tungsten Arc Welding (GTAW). Solid and Flux cored two types wires were examined for their influence on the resulting oxygen content in weld metals. It has succeeded in controlling the oxygen contents without changing welding processes. As expected, the increasing oxygen content obviously decreased the upper shelf energy (vEshelf). One of the primary reasons of this tendency is considered that the higher density of oxide makes dimples on the ductile fracture surface smaller. On the other hand, as unexpected, the oxygen content from 7 to 450 ppm had no impact on the fracture appearance transition temperature (FATT), and oxides at the brittle fracture initiation point have not been found. This result supports that the oxides in high strength full martensitic weld metals (Vickers hardness = 360 ~ 430) have no harmful effect on FATT.

  Info
Periodical
Materials Science Forum (Volumes 638-642)
Main Theme
Edited by
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
Pages
3687-3692
DOI
10.4028/www.scientific.net/MSF.638-642.3687
Citation
S. Nakamura, T. Hasegawa, R. Shimura, I. Kimoto, "Effect of Oxygen Content on Toughness in High Strength Weld Metal", Materials Science Forum, Vols. 638-642, pp. 3687-3692, 2010
Online since
January 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Min Chul Kim, Bong Sang Lee, Won Jon Yang, Jun Hwa Hong
43
Authors: N. Driessen, Richard E. Clegg
Abstract:ASTM A106/B is commonly used for pressure piping in alumina refineries. Due to the problem of caustic cracking in alumina refineries, piping...
483
Authors: Qing Hua Lu, Zhi Shui Yu, Li Gong Chen
Abstract:The tension, Charpy notch impact and fracture toughness tests on structural steels Q235B and Q345 were carried out under different...
1441
Authors: Sadegh Moeinifar
Abstract:The objective of this paper is to study the influence of second peak temperature during simulated welding on properties of the subcritically...
1850
Authors: Shu Wei Leng, Zhang Mu Miao, Fu Xiang Qiu, Li Na Niu, Ting Miao
Chapter 9: Welding and Mechanical Connections and Fracture
Abstract:Several tests including CTOD and Charpy impact have been performed on the weld joints of high strength low alloy steel S335G10+N to identify...
1867