Interfacial segregation and fracture
A brief review is given of the physical mechanisms which control nucleation, growth, and coalescence of intergranular cavities during deformation of polycrystalline materials at intermediate temperatures under low applied stress. Effects of interfacial solute segregation on creep ductility are discussed by considering its effects on interfacial energies and diffusivities. The available experimental data concerning detrimental and beneficial solute effects on creep rupture life of model alloy systems are found to be consistent with the calculated time to rupture. Our limited understanding of the grain boundary chemistry effects on creep embrittlement of commercial structural alloys is pointed out, and further experimental and theoretical studies for the better understanding of controlling mechanisms are suggested.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6270704
- Report Number(s):
- CONF-8310340-1; ON: DE85000971
- Resource Relation:
- Conference: ASM materials science seminar on flow and fracture at elevated temperature, Philadelphia, PA, USA, 1 Oct 1983; Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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