Rationalization of impact energies of commercial steels having different impurity levels and heat treatments
Author: Lea, C.
Source: Metal Science, Volume 17, Number 10, October 1983 , pp. 491-496(6)
Publisher: Maney Publishing
Abstract:The room temperature impact energies of steels having the same nominal composition may vary considerably because of the effect of impurities. However, if such steels are purchased from different sources, the impact energies may appear not to be related to the purity at all. This problem is rationalized in a quantitative way in terms of the effect of the rate of cooling, after the final production heat treatment, on the varying grain boundary segregation levels of P in three batches of stainless steel. Measurements by Auger electron fractography confirm the calculations and these are used to explain, quite precisely, the variation in mechanical properties observed. This example is used to illustrate the procedures involved in quantifying the Auger electron analyses and in making the calculations of grain boundary composition. Sufficient data are now available to predict with confidence grain boundary chemistry and its effect on various mechanical properties of steels and, hence, to specify satisfactory bulk impurity levels and heat treatment cooling rates commensurate with acceptable mechanical properties.
Document Type: Research Article
Publication date: 1983-10-01
- Terms & Conditions
- ingentaconnect is not responsible for the content or availability of external websites