Effects of Cluster Porosity on the Tensile Properties of Butt-Weldments in T-1 Steel
Abstract
The effects of cluster porosity on the tensile properties of T-1 steel butt-weldments were assessed in a program consisting of three phases of experimentation. In the first phase, cluster porosity was expressed as a percentage of the total cross section. In the second phase, cluster porosity was measured both in terms of the actual total area of pores and the area of the cluster (including metal ligaments, or webs, that connect pores). These two phases showed that the tensile strength of the welded metal is not significantly reduced if the area of pores and the cluster area are below critical sizes; however, ductility is rapidly reduced until these sizes are reached. The third phase established a partial correlation between cluster porosity size and the length of a center-crack in a plate. The J integral concept of fracture mechanics was used to examine the existence of a critical value of the J integral with which the critical pore area size (or other measure of cluster porosity) could be correlated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1974
- Accession Number
- ADA004001
Entities
People
- E. M. Honig Jr.
Organizations
- Construction Engineering Research Laboratory