TY - JOUR
T1 - The effects of melting technologies on the microstructures and properties of Nb-16Si-22Ti-2Al-2Hf-17Cr alloy
AU - Li, Xiaojian
AU - Chen, Haifeng
AU - Sha, Jiangbo
AU - Zhang, Hu
PY - 2010
Y1 - 2010
N2 - This paper deals with the effects of vacuum non-consumable arc-melting (VCAM), vacuum induction melting (VIM) and induction skull melting (ISM) technologies on microstructures, mechanical properties and oxidation resistance of Nb-16Si-22Ti-2Al-2Hf-17Cr alloy. It is revealed that the microstructure of the Nb-16Si-22Ti-2Al-2Hf-17Cr alloy is composed of Nb solid solution (Nb,Ti)ss, silicide (Nb,Ti)5Si3 and Laves phase NbCr2. The ISM ingots exhibit the finest microstructure, while the VCAM ingot shows the coarsest microstructure. Refined at 1800°C for 10min, the VIM ingot with a 0.1% carbon addition shows the best room temperature toughness of 9.05MPam1/2 on average, however, the highest strength at 1250°C was obtained on the ISM sample refined at technology parameters of 140kw melting for 2min+160kw melting for 3min. In addition, oxidation resistance was greatly improved through the ISM technology compared with the VCAM technology.
AB - This paper deals with the effects of vacuum non-consumable arc-melting (VCAM), vacuum induction melting (VIM) and induction skull melting (ISM) technologies on microstructures, mechanical properties and oxidation resistance of Nb-16Si-22Ti-2Al-2Hf-17Cr alloy. It is revealed that the microstructure of the Nb-16Si-22Ti-2Al-2Hf-17Cr alloy is composed of Nb solid solution (Nb,Ti)ss, silicide (Nb,Ti)5Si3 and Laves phase NbCr2. The ISM ingots exhibit the finest microstructure, while the VCAM ingot shows the coarsest microstructure. Refined at 1800°C for 10min, the VIM ingot with a 0.1% carbon addition shows the best room temperature toughness of 9.05MPam1/2 on average, however, the highest strength at 1250°C was obtained on the ISM sample refined at technology parameters of 140kw melting for 2min+160kw melting for 3min. In addition, oxidation resistance was greatly improved through the ISM technology compared with the VCAM technology.
KW - Induction melting
KW - Induction skull melting
KW - Mechanical property
KW - Microstructure
KW - Nb-Si based alloys
KW - Oxidation resistance
UR - https://www.scopus.com/pages/publications/77955470491
U2 - 10.1016/j.msea.2010.04.046
DO - 10.1016/j.msea.2010.04.046
M3 - 文章
AN - SCOPUS:77955470491
SN - 0921-5093
VL - 527
SP - 6140
EP - 6152
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
IS - 23
ER -