Abstract
The deformation behavior of alumina ceramics with multi-level pore structure and strain accumulation during cyclic compression tests with increasing load has been studied. It is established that the creation of a block structure in alumina ceramics, due to multilevel porosity and the effect of "zonal segregation", allows moving from brittle deformation behavior to quasi-plastic. Cyclic tests indicated the presence a hysteresis and allowed to determine the residual deformation (the limit of proportionality). It is shown that the residual deformation occurs after a stress of 13 MPa, which is approximately 0.3 of fracture stresses. Microanalysis of the fracture surface indicates that the fracture goes along the boundaries of the blocks, or in other words, through the pore channels. Analysis of the stress-train curves before beginning of plasticity showed that it can be divided into three parts with different slopes which define a "technical" modulus under compression test. Cyclic tests with increasing load indicate high resistance of alumina ceramics with multilevel pore structure to defects arising in its volume, which is not typical of alumina ceramics with unimodal or bimodal porosity.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2019 |
| Editors | Victor E. Panin, Sergey G. Psakhie, Vasily M. Fomin |
| Publisher | American Institute of Physics Inc. |
| ISBN (Electronic) | 9780735419124 |
| DOIs | |
| Publication status | Published - 19 Nov 2019 |
| Event | International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2019 - Tomsk, Russian Federation Duration: 1 Oct 2019 → 5 Oct 2019 |
Publication series
| Name | AIP Conference Proceedings |
|---|---|
| Volume | 2167 |
| ISSN (Print) | 0094-243X |
| ISSN (Electronic) | 1551-7616 |
Conference
| Conference | International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2019 |
|---|---|
| Country | Russian Federation |
| City | Tomsk |
| Period | 1.10.19 → 5.10.19 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Low stress cycling of porous alumina metamaterial. / Grigoriev, M. V.; Kulkov, S. N.
Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2019. ed. / Victor E. Panin; Sergey G. Psakhie; Vasily M. Fomin. American Institute of Physics Inc., 2019. 020119 (AIP Conference Proceedings; Vol. 2167).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Low stress cycling of porous alumina metamaterial
AU - Grigoriev, M. V.
AU - Kulkov, S. N.
PY - 2019/11/19
Y1 - 2019/11/19
N2 - The deformation behavior of alumina ceramics with multi-level pore structure and strain accumulation during cyclic compression tests with increasing load has been studied. It is established that the creation of a block structure in alumina ceramics, due to multilevel porosity and the effect of "zonal segregation", allows moving from brittle deformation behavior to quasi-plastic. Cyclic tests indicated the presence a hysteresis and allowed to determine the residual deformation (the limit of proportionality). It is shown that the residual deformation occurs after a stress of 13 MPa, which is approximately 0.3 of fracture stresses. Microanalysis of the fracture surface indicates that the fracture goes along the boundaries of the blocks, or in other words, through the pore channels. Analysis of the stress-train curves before beginning of plasticity showed that it can be divided into three parts with different slopes which define a "technical" modulus under compression test. Cyclic tests with increasing load indicate high resistance of alumina ceramics with multilevel pore structure to defects arising in its volume, which is not typical of alumina ceramics with unimodal or bimodal porosity.
AB - The deformation behavior of alumina ceramics with multi-level pore structure and strain accumulation during cyclic compression tests with increasing load has been studied. It is established that the creation of a block structure in alumina ceramics, due to multilevel porosity and the effect of "zonal segregation", allows moving from brittle deformation behavior to quasi-plastic. Cyclic tests indicated the presence a hysteresis and allowed to determine the residual deformation (the limit of proportionality). It is shown that the residual deformation occurs after a stress of 13 MPa, which is approximately 0.3 of fracture stresses. Microanalysis of the fracture surface indicates that the fracture goes along the boundaries of the blocks, or in other words, through the pore channels. Analysis of the stress-train curves before beginning of plasticity showed that it can be divided into three parts with different slopes which define a "technical" modulus under compression test. Cyclic tests with increasing load indicate high resistance of alumina ceramics with multilevel pore structure to defects arising in its volume, which is not typical of alumina ceramics with unimodal or bimodal porosity.
UR - http://www.scopus.com/inward/record.url?scp=85075775288&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85075775288&partnerID=8YFLogxK
U2 - 10.1063/1.5131986
DO - 10.1063/1.5131986
M3 - Conference contribution
AN - SCOPUS:85075775288
T3 - AIP Conference Proceedings
BT - Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2019
A2 - Panin, Victor E.
A2 - Psakhie, Sergey G.
A2 - Fomin, Vasily M.
PB - American Institute of Physics Inc.
ER -