Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1574673 | Materials Science and Engineering: A | 2014 | 7 Pages |
Abstract
The Portevin-Le Chatelier effect manifests itself as an unstable plastic flow which occurs during tensile tests of some dilute materials in a certain range of temperatures and strain rates. This phenomenon is also exceptionally intense in nickel based superalloys used in the aerospace industry. The aim of this research was to investigate the Portevin-Le Chatelier effect in Inconel 718 solution strengthened superalloy. The tested material was subjected to tensile tests carried out within the temperature range 250-600 °C with three different strain rates 2Ã10â3 sâ1, 10â2 sâ1 and 5Ã10â2 sâ1. The strain curves were analyzed in terms of intensity and statistical behavior. A quantitative method to describe the phenomenon was used in the study. The results indicate the presence of clear trends with temperature and strain rates. Additional optical observations were carried out to assess the changes of the microstructure.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
P. Maj, J. Zdunek, M. Gizynski, J. Mizera, K.J. Kurzydlowski,