Microstructure and mechanical properties of Nb-Ti-Si-Al-Hf-xCr-yV multi-element in situ composite
In: Materials science & engineering. A, Structural materials : properties, microstructure and processing, Jg. 534 (2012), S. 323-328
academicJournal
- print, 47 ref
Zugriff:
The objective of the paper is to investigate the microstructure, room-temperature fracture toughness and high-temperature compressive deformation behavior of Nb-Ti-Si-Al-Hf-Cr-V multi-component Nbss/Nb-silicide in situ composite materials with different Cr and V contents. Nb-silicide presented as the primary phase. Cr and V were assisted to stabilize β-Nb5Si3 to room temperature. The highest value room-temperature fracture toughness (KQ = 14.7 MPa m1/2) preformed in the test for the materials with lowest Cr and V composition. Crack bridging and crack deflection observed in the crack propagation path were benefit to improve the room temperature fracture toughness. Higher V contents up to 4 at.% was preferred to increase the strength of the studied multi-component system at 1250°C. A softening of materials phenomenon occurred after the peak stress during compressive tests at 1250°C.
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Microstructure and mechanical properties of Nb-Ti-Si-Al-Hf-xCr-yV multi-element in situ composite
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Autor/in / Beteiligte Person: | YONGWANG, KANG ; SHIYU, QU ; JINXIA, SONG ; QIANG, HUANG ; YAFANG, HAN |
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Zeitschrift: | Materials science & engineering. A, Structural materials : properties, microstructure and processing, Jg. 534 (2012), S. 323-328 |
Veröffentlichung: | Kidlington: Elsevier, 2012 |
Medientyp: | academicJournal |
Umfang: | print, 47 ref |
ISSN: | 0921-5093 (print) |
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