Paper Title:
Micromechanical Aspects of Transgranular and Intergranular Failure Competition
  Abstract

Quantification of characteristics that govern intergranular fracture initiation and propagation of this fracture micromechanism in competition with cleavage one is main aim of the paper. A NiCr steel of commercial quality and the same steel with an increased content of impurity elements, Sn and Sb, were used. Step cooling ageing was applied in order to induce intergranular embrittlement. Standard and pre-cracked Charpy type specimens were both tested in three-point bending to determine fracture toughness characteristics. In order to characterise the quantitative differences in fracture surfaces roughness a fractal analysis was applied. A boundary level of fractal dimension has been determined to be 1.12: fracture surface roughness with a higher value reflects high level of intergranular embrittlement and thus fracture resistance degradation.

  Info
Periodical
Edited by
Pavel Šandera
Pages
399-402
DOI
10.4028/www.scientific.net/KEM.465.399
Citation
I. Dlouhy, M. Tarafder, H. Hadraba, "Micromechanical Aspects of Transgranular and Intergranular Failure Competition", Key Engineering Materials, Vol. 465, pp. 399-402, 2011
Online since
January 2011
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: Péter Trampus
Abstract:Fracture of ferritic reactor pressure vessel steels is determined by temperature and specimen size. In low temperature fracture occurs by...
465
Authors: Ivo Dlouhý, Ladislav Jurášek, Miloslav Holzmann
Abstract:In pearlitic steels the fracture initiation of pre-cracked specimens is strongly affected by Lüders’ flow and higher strength properties....
413
Authors: Vladimir Grishchenko, Sergiy Kotrechko, Sergey Mamedov, Oleksandra Zatsarna, Ivo Dlouhý
Chapter 4: Mathematical modeling microstructure, deformation and fracture
Abstract:The complexity of calibration procedure for determination of Weibull distribution parameters as well as necessity to perform FEM calculations...
221
Authors: Andrzej Neimitz, Ihor Dzioba, Urszula Janus
Abstract:In the paper the fracture mechanisms in ultra-high-strength steel are examined. However, the emphasis is on cleavage fracture, which was...
168