Characterization of incubation time on creep crack growth for weldments of P92

Most structures are mainly fabricated by welding which are likely to be regions of crack initiation and propagation. In such weldment, it is known that the multi-axial stress fields appear due to the plastic constraint induced by the differences in material micro-structure between the weld metal, he...

Full description

Saved in:
Bibliographic Details
Published in:Engineering fracture mechanics 2010-10, Vol.77 (15), p.3053-3065
Main Authors: Sugiura, Ryuji, Toshimitsu Yokobori, A., Suzuki, Kazuto, Tabuchi, Masaaki
Format: Article
Language:English
Subjects:
Base metal
Condensed matter: structure, mechanical and thermal properties
Crack initiation
Crack propagation
Creep
Creep (materials)
Creep crack growth
Creep ductility
Exact sciences and technology
Fracture mechanics
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Heat affected zone
Incubation time
Inelasticity (thermoplasticity, viscoplasticity...)
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Multi-axiality
Physics
Solid mechanics
Stresses
Structural and continuum mechanics
Weldment
Weldments
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Most structures are mainly fabricated by welding which are likely to be regions of crack initiation and propagation. In such weldment, it is known that the multi-axial stress fields appear due to the plastic constraint induced by the differences in material micro-structure between the weld metal, heat affected zone (HAZ) and base metal. In the present study, the experiments of creep crack growth tests and the structural mechanical analyses of weldment were conducted to understand the effects of stress multi-axiality of weldment on the characteristics of creep crack growth, creep deformation and creep ductility. Additionally, to characterize the time of creep crack initiation up to the start of a brittle type creep crack growth, the distribution of stress multi-axiality ( TF) through the base metal, fine-grain HAZ, coarse-grain HAZ to weld metal were investigated.
ISSN:0013-7944
1873-7315
DOI:10.1016/j.engfracmech.2010.04.025