TY - JOUR
T1 - Mechanical behaviors of chromium- or niobium-modified Ni47.5Al25Fe27.5 alloy at elevated temperature
AU - Tsau, Chun Huei
AU - Yeh, Jien Wei
AU - Jang, Jason Shian Ching
N1 - Funding Information:
The authors thank the National Science Council of Taiwan, Republic of China, for the financial support of this research under Contract No. NSC 91-2216-E-034-008.
PY - 2006/1
Y1 - 2006/1
N2 - The microstructure of the Ni47.5Al25Fe27.5 alloy was modified by adding Cr or Nb to improve its tensile properties. Increasing the Cr content increased the volume fraction of the interdendritic regions and, subsequently, increased the tensile elongation at room temperature. Additionally, adding Nb significantly improved the tensile properties of the Ni47.03Al24.75Fe27.23NB1 alloy, because the element Nb reduces the number of γ/β′ interfaces and strengthened both the γ and β′ phases and the γ/β′ interfaces. Both the as-annealed Ni47.03Al24.75Fe27.23Cr1 and Ni47.03Al24.75Fe27.23Nb1 alloys exhibited a tensile elongation at room temperature of over 10 pct. However, temperature strongly affected the tensile properties. The brittleness of the Ni47.03Al24.75Fe27.23Nb1 alloy was effectively inhibited because of its lower temperature sensitivity at moderate temperatures.
AB - The microstructure of the Ni47.5Al25Fe27.5 alloy was modified by adding Cr or Nb to improve its tensile properties. Increasing the Cr content increased the volume fraction of the interdendritic regions and, subsequently, increased the tensile elongation at room temperature. Additionally, adding Nb significantly improved the tensile properties of the Ni47.03Al24.75Fe27.23NB1 alloy, because the element Nb reduces the number of γ/β′ interfaces and strengthened both the γ and β′ phases and the γ/β′ interfaces. Both the as-annealed Ni47.03Al24.75Fe27.23Cr1 and Ni47.03Al24.75Fe27.23Nb1 alloys exhibited a tensile elongation at room temperature of over 10 pct. However, temperature strongly affected the tensile properties. The brittleness of the Ni47.03Al24.75Fe27.23Nb1 alloy was effectively inhibited because of its lower temperature sensitivity at moderate temperatures.
UR - http://www.scopus.com/inward/record.url?scp=31544472092&partnerID=8YFLogxK
U2 - 10.1007/s11661-006-0162-3
DO - 10.1007/s11661-006-0162-3
M3 - 期刊論文
AN - SCOPUS:31544472092
SN - 1073-5623
VL - 37
SP - 175
EP - 184
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 1
ER -