Journal article
Compressive creep of fine and coarse-grained T 3SiC 2 in air in the 1100–1300 °C temperature range
Acta materialia, v 53(19), pp 4963-4973
2005
Abstract
Herein, we report on the compressive creep behavior of hot isostatically pressed (HIPed) fine-grained (FG) and coarse-grained (CG) Ti
3SiC
2 in the 1100–1300
°C temperature range. The creep behavior is characterized by three regimes, a primary, quasi-steady state and a tertiary. At lower stresses, the creep rates of the two microstructures are comparable suggesting that dislocation creep is operative. At ≈2, the stress exponents in the quasi-steady state regime are comparable to those measured in tension; the creep rates in compression, however, are roughly an order of magnitude lower. At relatively high stresses and/or temperatures, the stress exponents of the FG samples increase dramatically and the creep rates of the CG samples are higher than their FG counterparts. Both observations suggest a change of mechanism from dislocation creep to possibly sub-critical crack growth, in which delaminations play an important role. This conclusion is bolstered by post-deformation microstructural analysis that shows evidence for sub-critical crack growth. The minimum creep rates of pressureless sintered Ti
3SiC
2 samples were roughly an order of magnitude higher than HIPed samples, with comparable grain size strongly suggesting that some form of grain boundary related deformation, such as decohesion and/or sliding, is playing an important role in the sintered samples.
Metrics
Details
- Title
- Compressive creep of fine and coarse-grained T 3SiC 2 in air in the 1100–1300 °C temperature range
- Creators
- T. Zhen - Drexel UniversityM.W. Barsoum - Drexel UniversityS.R. Kalidindi - Drexel UniversityM. Radovic - Oak Ridge National LaboratoryZ.M. Sun - Drexel UniversityT. El-Raghy - 3-ONE-2, Voorhees, NJ, United States
- Publication Details
- Acta materialia, v 53(19), pp 4963-4973
- Publisher
- Elsevier; OXFORD
- Number of pages
- 11
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000232859000001
- Scopus ID
- 2-s2.0-26644471025
- Other Identifier
- 991021901312404721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Metallurgy & Metallurgical Engineering