Correlations between Micromechanical Features and Material Toughness in HY-100 Steel
Abstract
There have been a number of studies that have attempted to correlate micromechanical features to global material properties. One motivation behind establishing this relationship is to demonstrate some consistency between a given method of evaluating global material properties and the actual physical behavior of a specimen. Previous studies have concentrated on trying to correlate the plane-strain fracture toughness (Kic) of a material to various fractographic features such as dimple size, proportions of cleavage and ductile tear and the size of the 'stretched zone'. The results of these investigations have been successful in showing qualitative relationships between (Kic) and the previously mentioned fractographic features. However, attempts to quantify these relationships have been less successful because of substantial scatter in the data. In the present investigation, a study was conducted on HY-100 steel to find possible relationships between fractographic features (i.e. linear microvoid density, microvoid aspect ratios and proportions of microvoid coalescence, ductile tear and cleavage) and the material toughness quantified by the critical strain energy density (Wc) using tensile specimens of various gage geometries. Keywords: Molecule molecule interactions; Physical properties.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 20, 1988
- Accession Number
- ADA200379
Entities
People
- D. P. Harvey Ii
- M. I. Jolles
Organizations
- United States Naval Research Laboratory