Near-threshold fatigue: an overview of the role of microstructure and environment
Conference
·
OSTI ID:5792708
An overview is presented of the salient micro-mechanisms, primarily involving crack closure, which can influence the growth of fatigue cracks at near-threshold levels. Examples are drawn from recent work on crack propagation in dual-phase and low alloys steels and in under/peak/overaged aluminium alloys. Factors such as duplex microstrucures, variations in slip mode, high pressure hydrogen environments and compression overloads are shown to modify changes in near-threshold crack growth behavior.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5792708
- Report Number(s):
- LBL-18457; CONF-8409121-2; ON: DE85009903
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
CRACK PROPAGATION
CRYSTAL STRUCTURE
ELEMENTS
ENVIRONMENT
FATIGUE
HARDENING
HYDROGEN
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NONMETALS
PRECIPITATION HARDENING
ROUGHNESS
STEELS
SURFACE PROPERTIES
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
CRACK PROPAGATION
CRYSTAL STRUCTURE
ELEMENTS
ENVIRONMENT
FATIGUE
HARDENING
HYDROGEN
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NONMETALS
PRECIPITATION HARDENING
ROUGHNESS
STEELS
SURFACE PROPERTIES