Mechanical Behaviors of Chromium- or Niobium-Modified Ni^sub 47.5^Al^sub 25^Fe^sub 27.5^ Alloy at Elevated Temperature

From: Metallurgical and Materials Transactions | Date: January 1, 2006| Author: | Copyright information

The microstructure of the Ni^sub 47.5^Al^sub 25^Fe^sub 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^sub 47.3^Al^sub 24.75^Fe^sub 27.23^Nb^sub 1^ alloy, because the element Nb reduces the number of γ/β' interfaces and strengthened both the y and β' phases and the γ/β' interfaces. Both the as-annealed ...

Read all of this article with a FREE trial to HighBeam Research

Related newspaper, magazine, and trade journal articles from HighBeam Research

(Including press releases, facts, information, and biographies)

Phase Equilibria of the Al^sub 2^O^sub 3^-CaF^sub 2^-FeO^sub n^ System
; ...preliminary experiments. FeO.Al^sub 2^O^sub 3^ was prepared by sintering the stoichiometric mixture of Al^sub 2^O^sub 3^, Fe^sub 2^O^sub 3^, and Fe at 1723 K for 20 hours in day Ar. The formation of FeO-Al^sub 2^O^sub 3^ was determined by X-ray powder...
Solid-Solid Reactions in the Ca^sub 3^(AsO^sub 4^)^sub 2^-Ca^sub 2^SiO^sub 4^-CaSO^sub 4^ Ternary System at Elevated Temperatures
; ...5^(AsO^sub 4^)^sub 2^(SiO^sub 4^) (1:1) and Ca^sub 8^(AsO^sub 4^)^sub 4^(SiO^sub 4^) (1:2). The formation of stable intermediate salts with...problematic. During the past few decades, regulations for SO^sub 2^ and CO2 emissions from nonferrous smelters have ...
Modeling of the Solubilities of NiO/NiAl^sub 2^O^sub 4^ and FeO/FeAl^sub 2^O^sub 4^ in Cryolite Melts at 1300 K
; ...Ni-containing complexes Na^sub 2^NiF^sub 4^ and Na^sub 4^NiF^sub 6^, and the Fe-containing solutes FeF^sub 2^, Na^sub 2^FeF^sub 4^, and Na...investigated. In the FeAl^sub 2^O^sub 4^ case, they failed to identify the Fe-containing solute species in ...
Reduction kinetics of Fe^sub 2^MoO^sub 4^ fine powder by hydrogen in a fluidized bed
; Iron molybdate (Fe^sub 2^MoO^sub 4^) powders with an average partiele...or - 17 kJ/mol. The crystal size of the Fe^sub 2^Mo powder produced at lower temperatures...feasibility of producing nanostructured Fe^sub 2^Mo in a fluidized-bed reactor by the reduction...
The Effect of Carbon in Slag on Steel Reoxidation and Carbon Analysis by X-Ray Photoelectron Spectroscopy in the CaO-SiO^sub 2^-Al^sub 2^O^sub 3^-MgO-MnO-Fe^sub t^O System
; ...carbon in CaO-SiO^sub 2^Al^sub 2^O^sub 3^-MgO-MnO-Fe^sub t^O slag systems on their Fe^sub t^O and MnO activity coefficients, representing the...for steel reoxidation. The activity coefficients of Fe^sub t^O and MnO showed not only a sharp increment but...
The Solubility of Cr^sub 2^O^sub 3^ in Calcium Ferrite Slags at 1573 K
; ...spinel containing Cr^sub 2^O^sub 3^, Fe^sub 2^O^sub 3^, and a small amount of MgO...the join CaO-Cr^sub 2^O^sub 3^-2CaO-Fe^sub 2^O^sub 3^ in the system CaO-Cr^sub 2^O^sub 3^-Fe^sub 2^O^sub 3^ at elevated temperature...
Orientation Analysis of Hexagonal Dendrite Formed from an Undercooled Melt of [alpha]-Fe^sub 2^Si^sub 5^
; ...containerless solidification of α-Fe^sub 2^Si^sub 5^ was conducted using an electromagnetic...despite the tetragonal structure of α-Fe^sub 2^Si^sub 5^. The growth velocity analysis...solidification in the anisotropic α-Fe^sub 2^Si^sub 5^ with c/a = ...
Quantitative characterization of the microstructure of two-phase TiB^sub 2^ + Al^sub 2^O^sub 3^ ceramics using mean integral curvature
; ...determined to quantitatively describe the connectivity of the TiB^sub 2^ minor phase around the Al^sub 2^O^sub 3^ major phase. The results illustrate that, in spite of partial...ceramic fabrication. For example, sintering aids such as B^sub 4^C assist in the pressureless sintering of ...
In-Situ Observation of Fe^sub 0.94^O Reduction at High Temperature with the Use of Optical Microscopy
; Highly (100) oriented Fe^sub 0.94^O, when physically contacted with...place anywhere on the surface of the Fe^sub 0.94^O at temperatures above 1173 K...nor spread from the point where the Fe^sub 0.94^O-graphite were in physical contact...
Thermodynamic Investigations of Cr^sub 3^C^sub 2^ and Reassessment of the Cr-C System
; ...e., Cr^sub 23^C^sub 6^, Cr^sub 7^C^sub 3^, and Cr^sub 3^C^sub 2^.[1,2] The carbides are all nonstoichiometric compounds...six determinations of the Gibbs energy of formation of Cr^sub 3^C^sub 2^ by the use of the galvanic cell technique (four of them using ...