Flow localization processes in austenitic alloys

Xianglin Wu, Xiao Pan, Meimei Li, James F. Stubbins

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Austenitic alloys are widely used for structural component applications in high irradiation environments. In general, they are more resistant to embrittlement than other classes of structural alloys, particularly at ambient and intermediate temperatures. Nevertheless, this class of materials suffers from highly localized flow when irradiated to moderate dose (- 1 to 5 dpa) at temperatures between 150 and 400°C. The loss of ductility is normally exhibited by very low values of uniform elongation in tensile tests. The processes that lead to plastic instability are examined here for several face centered cubic materials and alloys. It is found that there is a critical stress level at which necking initiates. This critical stress level is not influenced by irradiation exposure. However, irradiation exposure, which increases material yield strength, does result in proportional reductions in uniform elongation. Most of the materials examined here exhibit a bilinear strain hardening behavior. This leads to direct correlation between the material yield strength and the uniform elongation.

Original languageEnglish (US)
Title of host publicationEffects of Radiation on Materials
Subtitle of host publication22nd Symposium
PublisherAmerican Society for Testing and Materials
Pages314-327
Number of pages14
ISBN (Print)0803134010, 9780803134010
StatePublished - Jan 1 2006
Event22nd Symposium on Effects of Radiation on Materials - Boston, MA, United States
Duration: Jun 8 2004Jun 10 2004

Publication series

NameASTM Special Technical Publication
Volume1475 STP
ISSN (Print)0066-0558

Other

Other22nd Symposium on Effects of Radiation on Materials
CountryUnited States
CityBoston, MA
Period6/8/046/10/04

Keywords

  • Austenitic alloys
  • Flow localization
  • Tensile test
  • Uniform elongation

ASJC Scopus subject areas

  • Materials Science(all)

Fingerprint Dive into the research topics of 'Flow localization processes in austenitic alloys'. Together they form a unique fingerprint.

  • Cite this

    Wu, X., Pan, X., Li, M., & Stubbins, J. F. (2006). Flow localization processes in austenitic alloys. In Effects of Radiation on Materials: 22nd Symposium (pp. 314-327). (ASTM Special Technical Publication; Vol. 1475 STP). American Society for Testing and Materials.