Mechanical behaviors of chromium- or niobium-modified Ni47.5Al25Fe27.5 alloy at elevated temperature

Chun Huei Tsau; Jien Wei Yeh; Jason Shian Ching Jang

doi:10.1007/s11661-006-0162-3

Mechanical behaviors of chromium- or niobium-modified Ni_47.5Al₂₅Fe_27.5 alloy at elevated temperature

Chun Huei Tsau
, Jien Wei Yeh
, Jason Shian Ching Jang

Graduate Institute of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The microstructure of the Ni_47.5Al₂₅Fe_27.5 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 Ni_47.03Al_24.75Fe_27.23NB₁ 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 Ni_47.03Al_24.75Fe_27.23Cr₁ and Ni_47.03Al_24.75Fe_27.23Nb₁ alloys exhibited a tensile elongation at room temperature of over 10 pct. However, temperature strongly affected the tensile properties. The brittleness of the Ni_47.03Al_24.75Fe_27.23Nb₁ alloy was effectively inhibited because of its lower temperature sensitivity at moderate temperatures.

Original language	English
Pages (from-to)	175-184
Number of pages	10
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	37
Issue number	1
DOIs	https://doi.org/10.1007/s11661-006-0162-3
State	Published - Jan 2006

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title = "Mechanical behaviors of chromium- or niobium-modified Ni47.5Al25Fe27.5 alloy at elevated temperature",

abstract = "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.",

author = "Tsau, \{Chun Huei\} and Yeh, \{Jien Wei\} and Jang, \{Jason Shian Ching\}",

note = "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.",

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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.

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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.

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Mechanical behaviors of chromium- or niobium-modified Ni47.5Al25Fe27.5 alloy at elevated temperature

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Mechanical behaviors of chromium- or niobium-modified Ni_47.5Al₂₅Fe_27.5 alloy at elevated temperature