Stress enhanced grain boundary segregation of impurity elements in a low alloy steel |
| |
| Affiliation: | 1. School of Mechanical Engineering, Purdue University, 500 Allison Road, West Lafayette, IN 47906, USA;2. Purdue Energetics Research Center, Purdue University, West Lafayette, IN 47906, USA;3. Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, USA;4. Notre Dame Integrated Imaging Facility, University of Notre Dame, Notre Dame, IN, 46556, USA;1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P.R. China;2. M.C. Gill Composites Center, Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089-0241, U.S.A |
| |
| Abstract: | Grain boundary segregation isotherms determined by Auger electron spectroscopy (AES) have been employed to elucidate the effect of applied stress on grain boundary chemistry of a low alloy 2.6 NiCrMoV steel. A comparison of grain boundary segregation isotherms of low alloy steel isothermally heat treated at 773 K under constant load and unstressed conditions strongly indicates that stress accelerates grain boundary segregation of impurity elements N, P and S. This enhancement of grain boundary coverage of elements N, P and S is explained in terms of structure of grain boundary, described commonly as an array of linked deltahedra containing holes of varying size and shape. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
