Published January 25, 2011 | Version v1
Journal article Metadata-only

Boron effects on the ductility of a nano-cluster-strengthened ferritic steel

Creators

  • 1. Materials Research and Education Center, Auburn University, 275 Wilmore Labs, Auburn, AL 36849 (United States)
  • 2. Engineering Research Center of Materials Behavior and Design, Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094 (China)
  • 3. Department of Mechanical Engineering, the Hong Kong Polytechnic University, Hung Hom, Kowloon (Hong Kong)
  • 4. Institute for Materials Research, and World Premier International Research Center for Atoms, Molecules and Materials, Tohoku University, Sendai 980-8577 (Japan)
  • 5. Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208-3108 (United States)

Description

Research highlights: → Cu-rich nano-particle precipitation strengthens the ferritic steels. → Boron doping suppresses brittle intergranular fracture. → Moisture-induced environmental embrittlement can be alleviated by surface coating. - Abstract: The mechanical properties of Cu-rich nano-cluster-strengthened ferritic steels with and without boron doping were investigated. Tensile tests at room temperature in air showed that the B-doped ferritic steel has similar yield strength but a larger elongation than that without boron doping after extended aging at 500 deg. C. There are three mechanisms affecting the ductility and fracture of these steels: brittle cleavage fracture, week grain boundaries, and moisture-induced hydrogen embrittlement. Our study reveals that boron strengthens the grain boundary and suppresses the intergranular fracture. Furthermore, the moisture-induced embrittlement can be alleviated by surface coating with vacuum oil.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.msea.2010.10.058

Additional details

Identifiers

DOI
10.1016/j.msea.2010.10.058;
PII
S0921-5093(10)01223-2;

Publishing Information

Journal Title
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
Journal Volume
528
Journal Issue
3
Journal Page Range
p. 855-859
ISSN
0921-5093
CODEN
MSAPE3

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
44010528
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
AGING; BORON ADDITIONS; CLEAVAGE; DOPED MATERIALS; DUCTILITY; ELONGATION; FERRITIC STEELS; FRACTURES; GRAIN BOUNDARIES; HYDROGEN EMBRITTLEMENT; MOISTURE; PARTICLES; PRECIPITATION; SURFACE COATING; YIELD STRENGTH
Descriptors DEC
ALLOYS; BORON ALLOYS; CARBON ADDITIONS; DEFORMATION; DEPOSITION; EMBRITTLEMENT; FAILURES; IRON ALLOYS; IRON BASE ALLOYS; MATERIALS; MECHANICAL PROPERTIES; MICROSTRUCTURE; SEPARATION PROCESSES; STEELS; TENSILE PROPERTIES; TRANSITION ELEMENT ALLOYS

Optional Information

Copyright
Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.