Role of interfaces in cavity formation

Conference · Thu Oct 10 00:00:00 EDT 1985

OSTI ID:6149267

Yoo, M H; Trinkaus, H

Nucleation of intergranular and interfacial cavities in two-phase materials during deformation at elevated temperatures is examined using a classical nucleation model under time-dependent vacancy supersaturation. Various potential sites of cavity nucleation in structural alloys are reviewed. A predictive capability for the propensity of cavity nucleation is developed on the basis of the mobilities of dislocations involved in the stress concentration and relaxation process. If the mobility of interfacial dislocations at two-phase interfaces is increased to a level close to that of grain-boundary dislocations, cavity formation in two-phase materials can be generally suppressed.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6149267
• Report Number(s): CONF-8510160-14; ON: DE86004763
• Resource Relation: Conference: ASM metals congress/TMS-AIME fall meeting, Toronto, Canada, 13 Oct 1985
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALLOYS
CAVITATION
CAVITIES
DISLOCATIONS
GRAIN BOUNDARIES
INTERFACES
MICROSTRUCTURE
NUCLEATION
STRESS ANALYSIS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
LINE DEFECTS
360103* - Metals & Alloys- Mechanical Properties