Paper Title:
EBSD Analysis of HAZ Microstructure Characteristics of a High Strength Low Welding Crack Susceptibility Steel
  Abstract

This paper discussed the variation of microstructure at different locations of heat affected zone (HAZ) of a high strength steel welded joint using an optical microscope and an electron backscattered diffraction (EBSD) system. The results revealed that the change of microstructure plays an important part in the toughness properties at different locations of the HAZ. the CGHAZ (coarsen grain HAZ) microstructure contains granular bainite with the large effective grain size and a number of rod-like M/A constituents, which provide the nucleation sites and linear propagation path for micro-crack, therefore, this location becomes a local brittle zone. However, in the FGHAZ (fine grain HAZ) due to the microstructure mainly consisting of fine quasi-polygonal ferrite with high density of high angle grain boundaries, which can act as obstacles to cleavage propagation, the FGHAZ (fine grain HAZ) toughness is more excellent than the CGHAZ toughness.

  Info
Periodical
Advanced Materials Research (Volumes 152-153)
Edited by
Zhengyi Jiang, Jingtao Han and Xianghua Liu
Pages
852-855
DOI
10.4028/www.scientific.net/AMR.152-153.852
Citation
L. Y. Lan, C. L. Qiu, D. W. Zhao, "EBSD Analysis of HAZ Microstructure Characteristics of a High Strength Low Welding Crack Susceptibility Steel", Advanced Materials Research, Vols. 152-153, pp. 852-855, 2011
Online since
October 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: Hak Cheol Lee, Xiao Dan Wu, Young Min Kim, Nack J. Kim
Abstract:Effects of acicular ferrite and retained austenite on the mechanical properties of bainite-base steels were investigated. Various morphology...
780
Authors: Hui Xie, Lin Xiu Du, Jun Hu
Symposium R: Steel
Abstract:The effect of cooling procedure on the transformation behavior of low-carbon Cr-Mo microalloyed steel was investigated by using...
761
Authors: Qiang Zhang, Jian Min Han, Zhi Yong Yang, Jun Qiang Wang
Chapter 3: Advanced Technologies in Material Machining
Abstract:The microstructure and impact toughness of joints of HG785D high strength steel welded by metal active gas shielded arc welding...
740