Effect of Cr Additions on Toughness, Strength, and Oxidation Resistance of an Nb-4Si-20Ti-6Hf Alloy at Room and/or High Temperatures
Effect of Cr Additions on Toughness, Strength, and Oxidation Resistance of an Nb-4Si-20Ti-6Hf Alloy at Room and/or High Temperatures
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Cr 添加量对 Nb-4Si-20Ti-6Hf 合金在室温和/或高温下韧性、强度和抗氧化性的影响
DOI：
10.1007/s11661-010-0549-z
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发表时间：
2011-06
期刊：
影响因子：
--
通讯作者：
Zhou, Chungen
中科院分区：
文献类型：
--
作者：
Sha, Jiangbo;Liu, Jun;Zhou, Chungen
The mechanical properties and oxidation resistance of Nb-4Si-20Ti-6Hf-yCr alloys (wherey= 6, 10, 14 at. pct) with an NbSS-dominant NbSS/Nb3Si/Nb5Si3microstructure at room and/or high temperatures were primarily studied. It was found that at room temperature, fracture toughness was decreased by Cr additions, the fracture mode of the NbSSphase was intergranularly cleavage, and the silicides (Nb3Si and Nb5Si3) fractured in a brittle manner. It is interesting that strength as a function of Cr content is dependent on temperature. Up to 1423 K (1150 °C), the strength was improved by Cr additions, whereas above that temperature, the strength decreased. As the Cr content increased from 6 to 14 at. pct, for example, the yield strengthσ0.2increased from 198 to 258 MPa at 1423 K (1150 °C) but decreased from 109 to 83 MPa at 1623K (1350 °C). Cr additions cannot improve the oxidation resistance of this NbSS-dominant microstructure considerably; the weight gain at 100 hours of air exposure at 1523 K (1250 °C) was 255 mg/cm2at a nominal Cr content of 6 at. pct and 220 mg/cm2at a Cr content of 14 at. pct.
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DOI：
10.1016/0921-5093(95)03299-1
发表时间：
1995-02-28
影响因子：
6.4
作者：
BEWLAY, BP;LIPSITT, HA;SUTLIFF, JA
通讯作者：
SUTLIFF, JA
DOI：
10.1007/bf02667370
发表时间：
1991-07-01
期刊：
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
影响因子：
--
作者：
MENDIRATTA, MG;LEWANDOWSKI, JJ;DIMIDUK, DM
通讯作者：
DIMIDUK, DM
影响因子：
2.2
作者：
F. Gesmundo;F. Viani;Y. Niu;D. Douglass
通讯作者：
F. Gesmundo;F. Viani;Y. Niu;D. Douglass
影响因子：
2.6
作者：
M. R. Jackson;B. Bewlay;Raymond Grant Rowe;David William Skelly;H. A. Lipsitt
通讯作者：
M. R. Jackson;B. Bewlay;Raymond Grant Rowe;David William Skelly;H. A. Lipsitt
热挤压多相Nb-10Si-2Fe原位复合材料的断裂韧性
影响因子：
6
作者：
K.F. Zhang;J.L. Yu
通讯作者：
J.L. Yu